• In this talk I show how in Grand Unified Theories, and in the massless axion limit, only the QCD axion couples to photons. (dur.ac.uk)
  • Einstein's theory of relativity "just states that no particle can travel faster than a massless particle," Heeck said. (livescience.com)
  • In analogy with electromagnetism, for which the massless photon is the force carrier between charged particles, there could be a dark electromagnetism with a possibly massive dark photon that transmits the forces between dark particles [2] . (aps.org)
  • When introduced, its novelty was to provide a quantization of electromagnetic fields that provided a particle interpretation in terms of massless quanta called photons. (encyclopedia.com)
  • However, what is particularly important is that this time the high-energy photons have not only been recorded, but also their probable place of origin has been determined. (scitechdaily.com)
  • Observations of such high-energy photons are rare, and it is even rarer to identify the source. (scitechdaily.com)
  • The HHG process can be understood as a 3-step process: 1) the electron tunnels from the atom due to the strong laser field, 2) the electron propagates in the continuum driven by the laser field and 3) the electron recombines with the atom and emits short bursts of high-energy photons. (lu.se)
  • Essentially, he explained how a stream of photons can act both as a wave and particle. (zmescience.com)
  • According to the theory, it describes the value that a particle assumes if it were absolutely at rest. (absolutetheory.com)
  • Pevatrons - because this is what we are talking about here - are the largest natural particle accelerators in our galaxy, capable of accelerating protons and electrons to energies even many billions of times greater than the energy of photons of visible light. (scitechdaily.com)
  • Building on Mozumder's and Hatano's Charged Particle and Photon Interactions with Matter: Chemical, Physicochemical, and Biological Consequences with Applications (CRC Press, 2004), Charged Particle and Photon Interactions with Matter: Recent Advances, Applications, and Interfaces expands upon the scientific contents of the previous volume by covering state-of-the-art advances, novel applications, and future perspectives. (routledge.com)
  • Based on the Standard Model of particle physics , which governs the realm of the very tiny, Heeck calculated that photons in the visible spectrum would live for at least 1 quintillion years. (livescience.com)
  • Assuming photons have mass, "there is only one particle we know from the Standard Model of particle physics that might be even lighter - the lightest of the three neutrinos," Heeck said. (livescience.com)
  • The Standard Model is one of the most well-tested theories in particle physics. (symmetrymagazine.org)
  • In contemporary elementary particle physics, QED is actually only part of a more complete theory called the Standard Model that describes strong, weak, and electromagnetic interactions. (encyclopedia.com)
  • Furthermore, the electron density does give rise to a sufficiently large plasma frequency which cuts off the photon-axion mixing above microwave frequencies, shielding the cosmic microwave photons from axion conversions and significantly relaxing the lower bounds on the axion mass implied by the oscillation model. (harvard.edu)
  • The NIST team used a special circuit to generate microwave photons that were purified or stripped of intensity fluctuations, which reduced inadvertent heating of the drum. (nist.gov)
  • Dark photons' could be to blame. (space.com)
  • Intergalactic gas clouds are slightly hotter than they should be, new research claims, and theoretical particles called 'dark photons' could explain it. (space.com)
  • Recently, a team of astrophysicists have used sophisticated computer simulations to propose a radical solution: an exotic form of dark matter known as "dark photons" could be heating the place up. (space.com)
  • These strange particles would be the carriers of a new, fifth force of nature that normal matter does not experience, but occasionally these dark photons can flip their identities to become regular photons, providing a source of heat. (space.com)
  • We could find such dark photons by observing the intergalactic gas using what's known as the Lyman-alpha forest. (space.com)
  • One possible explanation for this discrepancy is the presence of "dark photons" in our universe , the study authors claim. (space.com)
  • However, the latest results from the BaBar collaboration offer no sign of dark photons, thus placing new limits on these types of models. (aps.org)
  • Mass and rest mass of the photon == Some scientists say that the photon has no mass because it has no rest mass. (absolutetheory.com)
  • According to Einstein, the rest mass of the photon is 0. (absolutetheory.com)
  • Mass of the photon not defined? (absolutetheory.com)
  • Since both tends towards zero for the photon or becomes zero, it was assumed that the mass of the photon was not defined. (absolutetheory.com)
  • The current upper limit for the mass of the photon is less than two-billionths of a billionth of a billionth of a billionth of a billionth of a billionth of a kilogram. (livescience.com)
  • For instance, photons are known to be susceptible to propagation loss (i.e., a loss of energy, radiation, or signals as it travels from one point to another) and do not interact with one another. (phys.org)
  • Sending in pulses containing two or more photons induce quantum correlations since only one photon at a time can interact with the quantum dot. (phys.org)
  • We developed a method to get photons to efficiently interact with each other mediated by the coupling to quantum dots ," Lodahl said. (phys.org)
  • Two photons may also interact with two W bosons in a quartic vertex (right), which is a four-point interaction. (cerncourier.com)
  • Despite photons being electrically neutral, the Standard Model (SM) allows two photons to interact via the exchange of virtual charged particles. (cerncourier.com)
  • Edited by preeminent scientists and with contributions from an esteemed group of international experts, this volume advances the field by offering greater insight into how charged particles and photons interact with matter. (routledge.com)
  • Quantum optics describes how individual quanta of light, the photons, interact with atoms, molecules and larger pieces of matter. (lu.se)
  • The x-ray photons can also interact directly with the spin of the electrons, and so they can scatter off the magnetic structure. (lu.se)
  • Researchers at University of Copenhagen in Denmark, Instituto de Física Fundamental IFF-CSIC in Spain, and Ruhr-Universität Bochum in Germany have recently devised a strategy that could help to overcome one of these challenges, namely the lack of photon-photon interactions. (phys.org)
  • In their new experiment, the researchers used the efficient and coherent coupling of a single quantum emitter with a nanophotonic waveguide to enable nonlinear quantum interactions between single-photon wave packets. (phys.org)
  • By identifying the deflected protons, one can determine whether such photon interactions took place and effectively turn the LHC into a photon collider. (cerncourier.com)
  • Quantum field theory is what's called a local theory: all interactions take place at a particular space-time point. (physlink.com)
  • Quantum electrodynamics, also known by its acronym, QED, is a relativistic quantum field theory that describes at a fundamental level the electro-magnetic interactions among electrically charged elementary particles such as electrons, positrons, muons, and quarks. (encyclopedia.com)
  • In addition, QED is essentially a complete theory of the electron's electromagnetic interactions and therefore provides a dynamical basis for atomic physics and all natural phenomena that spring from it, including chemistry, biology, and technology. (encyclopedia.com)
  • To appreciate the origins of gauge symmetries as fundamental descriptions of nature, it is instructive to consider how one introduces electromagnetic interactions into Dirac's theory of electrons. (encyclopedia.com)
  • It is shown that the electron-photon wave function is a unique functional of the electronic (current) density and the expectation values of photonic coordinates. (ehu.es)
  • Scientists generally assume photons do not break down, since they are thought to lack any mass with which to decay. (livescience.com)
  • Scientific projects such as the Planck mission, aimed at measuring the afterglow of the Big Bang, could potentially detect signs of the decay of photons. (livescience.com)
  • If photons do break down, the results of such decay must be even lighter particles, ones that would travel even faster than photons. (livescience.com)
  • In principle, each photon might decay into two of the lightest neutrinos. (livescience.com)
  • In a nonlinear medium, even a single photon would decay by down-converting (splitting) into lower-frequency photons with the same total energy 1 , at a rate given by Fermi's golden rule. (nature.com)
  • We generally applied these devices for deterministic single-photon sources and multi-photon entanglement sources, but another possible application would be to induce nonlinear operations on photons. (phys.org)
  • Lodahl and his colleagues realized the first proof-of-concept demonstration of nonlinear operations using individual photons back in 2015. (phys.org)
  • When they investigated this effect further, however, they encountered difficulties in thoroughly understanding the fundamental physics underlying this complex, single-photon and nonlinear interaction. (phys.org)
  • In our previous work, we found that the physics governing the nonlinear interaction of pulses of light was remarkably rich and gave rise to some novel opportunities for constructing photonic quantum gates and photon sorters," Lodahl said. (phys.org)
  • In other words, they successfully realized a nonlinear photon-photon interaction. (phys.org)
  • At the moment, Lodahl, Le Jeannic and their colleagues are trying to exploit the nonlinear photon-photon interaction realized in their recent study to simulate the vibrational dynamics of molecules. (phys.org)
  • I will present recent theoretical results on strongly correlated photons in arrays of nonlinear cavities, described by a driven-dissipative Bose-Hubbard model [2,3]. (mpg.de)
  • These mixed states occur when n pump photons have the same energy as n interacting photons inside the nonlinear cavity and survive up to a critical tunneling coupling strength, above which a crossover to a classical coherent state takes place. (mpg.de)
  • A detailed knowledge of single-photon detection, lidar, and/or Poisson processes is preferred. (merl.com)
  • Based on the single-photon ranging theory, the dead time, measurement accuracy, and detection probability model of single-photon LiDAR are studied. (hindawi.com)
  • The advantage of photon-counting laser ranging technology is that it can obtain distance information of long-distance targets with lower laser pulse energy, thereby increasing the number of beams, reducing the system's requirements for space-based satellite platforms such as power consumption and telescope aperture, and improving system performance, time resolution accuracy, and detection accuracy. (hindawi.com)
  • The single-photon detection efficiency and dark count are determined by the dead time of the system. (hindawi.com)
  • Thus, the dead time of the single-photon detector directly affects the detection of the system. (hindawi.com)
  • In this paper, according to the working principle of single-photon detection, the relationship model between the dead time of the single-photon detector, ranging accuracy, and detection probability is established, and the correctness of the relationship model is verified by simulation under different contrasts. (hindawi.com)
  • Theory of optical detection, communication, including quantum limits. (arizona.edu)
  • Within physics, the Hybrid Theory for photon transport in tissue uses the advantages and eliminates the deficiencies of both the Monte Carlo method and the diffusion theory for photon transport to model photons traveling through tissue both accurately and efficiently. (wikipedia.org)
  • A new project called the CMS-TOTEM Precision Proton Spectrometer (CT-PPS) has now taken up the challenge of making photon-photon physics possible at the LHC when operating at nominal luminosity. (cerncourier.com)
  • According to quantum physics that beam is made of zillions of tiny packets of light, called photons, streaming through the air. (zmescience.com)
  • For photons, this is an extreme value, one hundred trillion times greater than the energy typical of photons perceived by our eyes," says Dr. Sabrina Casanova from the Institute of Nuclear Physics of the Polish Academy of Sciences (IFJ PAN) in Cracow. (scitechdaily.com)
  • Quantum physics is regarded by many as the most powerful predictive theory science has produced. (philosophytalk.org)
  • The new NIST theory and experiments, described in the Jan. 12, 2017, issue of Nature , showed that a microscopic mechanical drum-a vibrating aluminum membrane-could be cooled to less than one-fifth of a single quantum, or packet of energy, lower than ordinarily predicted by quantum physics. (nist.gov)
  • Photon counting detectors are showing great potential for pre-clinical and clinical applications as outlined by [ 13 - 16 ]. (frontiersin.org)
  • Compared to protons and electrons, photons have a pleasant feature: they ignore magnetic fields and run to their target along the shortest path that space-time allows. (scitechdaily.com)
  • We now know of two mechanisms that can explain the existence of photons with energies of 200 TeV and above," explains Dr. Salesa Greus, before elaborating: "According to the first, the source of such energetic photons could be electrons with slightly higher energies, emitted by supernova remnants or pulsars and then interacting with the microwave background radiation filling the Universe. (scitechdaily.com)
  • In its simplest form, which will primarily be discussed here, QED combines James Maxwell's equations for electric and magnetic fields with Paul Dirac's quantum theory of electrons. (encyclopedia.com)
  • Thus, pure QED can be viewed as a fundamental theory of interacting electrons, positrons, and photons. (encyclopedia.com)
  • Our motivation for this is to create and study hybridized quantum states between electrons and photons. (lu.se)
  • The research focus of both experiment and theory is on generating and controlling long-lived coherent states and entanglement in different systems on the nanoscale. (lu.se)
  • Among them, the axion-photon coupling is of particular interest experimentally. (dur.ac.uk)
  • More generally - and due to kinetic or mass mixing - additional, light axion-like particles can appear but with an enormously suppressed coupling to photons. (dur.ac.uk)
  • We have recently proposed a mechanism of photon-axion oscillations as a way of rendering supernovae dimmer without cosmic acceleration. (harvard.edu)
  • Therefore the energy dependence of the photon-axion oscillations is consistent with experiment, and the oscillation model remains a viable alternative to the accelerating Universe for explaining the supernova observations. (harvard.edu)
  • Scientists have confirmed a decades-old theory about the non-uniform distribution of electron density in aromatic molecules, expanding the possibilities for designing new nanomaterials. (scitechdaily.com)
  • Space is from photon energy on expansion-contraction at light speed twice having a static concept to time without a beginning or end in an infinite universe while finite energy with matter have a moving physical concept of time from gravitational pull. (linusosullivan.com)
  • The arrangement of nanostructures within a light-trapping layer dramatically affects how photon energy is coupled into the plasmonic and waveguide modes confined in the active layer of a solar cell 20 . (nature.com)
  • The two parent protons remain completely intact, continuing their path in the LHC, but the photon-photon interaction removes a fraction of their initial energy and causes them to be slightly deflected from their original trajectories. (cerncourier.com)
  • As per Einstein's light quantum theory, photons have energy equal to their oscillation frequency times Planck's constant. (zmescience.com)
  • Einstein proved that light is a flow of photons, the energy of these photons is the height of their oscillation frequency, and the intensity of the light corresponds to the number of photons. (zmescience.com)
  • Photons with an energy of 200 teraelectronvolts are most likely emitted by protons colliding with interstellar gas. (scitechdaily.com)
  • How do we measure the energy of a photon? (thenakedscientists.com)
  • And what has post #806 got to do with photon energy? (thenakedscientists.com)
  • The book first explores the latest studies on primary processes (the physical stage), particularly on the energy deposition spectra and oscillator strength distributions of molecules interacting with charged particles and photons. (routledge.com)
  • How does a photon carry energy in itself? (sciforums.com)
  • Energy is completely unlike water, or steel, or even a box full of photons. (sciforums.com)
  • In this study, a post-image reconstruction material decomposition method is constructed for a low-energy micro-CT setup using a photon counting x-ray detector. (frontiersin.org)
  • The low photon energy range (4-11 keV) allows for K-edge contrast separation of naturally occurring materials in organic tissue without the need of additional contrast agents. (frontiersin.org)
  • With the photon counting detector, this data was obtained by acquiring two energy window images on each side of the K-edge of one material in the sample. (frontiersin.org)
  • A different approach is to use a photon counting detector with multiple energy-discriminating thresholds as shown by [ 9 - 11 ]. (frontiersin.org)
  • The resulting interaction attempts to convert a single photon excitation into a shower of low-energy photons but fails owing to the many-body localization mechanism, which manifests as a striking spectral fine structure of multiparticle resonances at the standing-wave-mode frequencies of the cavity. (nature.com)
  • Each departing photon takes with it one mechanical unit of energy-one phonon-from the drum's motion. (nist.gov)
  • The laser echo pulse contains at least thousands of photons of energy [ 1 ]. (hindawi.com)
  • The single-photon multimode LiDAR detector adopts a new single-photon system with the detector output energy according to photons [ 2 ]. (hindawi.com)
  • Evaluation of confounding and selection bias in epidemiological studies of populations exposed to low-dose, high-energy photon radiation. (cdc.gov)
  • In collaboration with Caltech and Fermilab, we have designed and optimised it to reject photonuclear reactions, and the most difficult of those when a bremsstrahlung photon transfers its entire energy to a small number of neutrons. (lu.se)
  • If the incident photon energy is just right, it can excite a core atomic electron into the valence band. (lu.se)
  • The key experimental necessity to exploit this feature is the ability to select the desired incident photon energy, according to the content of a given sample. (lu.se)
  • A photon is the smallest discrete amount or quantum of electromagnetic radiation. (zmescience.com)
  • Time-dependent (current) density functional theory for many-electron systems strongly coupled to quantized electromagnetic modes of a microcavity is proposed. (ehu.es)
  • Both represent the quantized field of a fundamental force: photons the electromagnetic field and gravitons the gravitational field. (physlink.com)
  • In spite of being the first testing ground of Quantum Mechanics, almost hundred years ago, Atomic Structure Theory is a vibrant and active area. (lu.se)
  • Using their experimental method, Lodahl and his colleagues were essentially able to control a photon using a second photon, which was mediated by their quantum emitter. (phys.org)
  • Here, we propose a platform based on an optimized five-dipole-coupled-emitter system coupled to a cavity which enables perfect I at high T. Within our scheme the realization of perfect I single photon emission with dissipative QDs is possible using well established photonic platforms. (mdpi.com)
  • Here we implement such an experiment using a superconducting multimode cavity, the nonlinearity of which was tailored to strongly violate the photon-number conservation. (nature.com)
  • The drumbeats generate light particles, or photons, which naturally match the higher resonance frequency of the cavity. (nist.gov)
  • These photons leak out of the cavity as it fills up. (nist.gov)
  • Recent attosecond experiments, based on laser-assisted photoionization (LAP), has allowed for direct measurements of photoionization delays, where diagrammatic many-body perturbation theory has been used to understand electron-electron correlation effects in photoionization. (lu.se)
  • The parameters of photon transport, including the step size and deflection angle due to scattering, are determined by random sampling from probability distributions. (wikipedia.org)
  • Since the probability of emitting photons scales with the square of the electrical charge, the cross-section for lead-lead collisions is significantly higher than for proton-proton collisions. (cerncourier.com)
  • The MCML is a numerical way to simulate photon transport in biological tissue. (wikipedia.org)
  • The Diffusion Theory is an approximation of the radiative transfer equation (RTE), and an analytical way to simulate photon transport. (wikipedia.org)
  • Researchers have experimentally verified a longstanding theory that posited that electron density is unevenly distributed in aromatic molecules. (scitechdaily.com)
  • The idea of neutrinos that move faster than photons would seem to violate the notion, based on Einstein's theory of relativity, that nothing can travel faster than light. (livescience.com)
  • Einstein's theory of relativity suggests when particles travel extraordinarily quickly, the fabric of space and time warps around them, meaning they experience time as passing more slowly than objects moving relatively slowly. (livescience.com)
  • The familiar photon is the force carrier of electromagnetism - it's what creates electricity, magnetism, and light. (space.com)
  • Quasi-random nanostructures have attracted significant interests for photon management purposes. (nature.com)
  • Each resonance was identified as a many-body state of radiation composed of photons from a broad frequency range and not obeying Fermi's golden rule theory. (nature.com)
  • Two photons propagating in a waveguide interacting with a single quantum emitter. (phys.org)
  • In such systems, the coupling is deterministic, so that even one photon launched into the waveguide is interacting with the quantum dot," Lodahl explained. (phys.org)
  • The NIST theory and experiments indicate that squeezed light removes the generally accepted cooling limit, Teufel said. (nist.gov)
  • Thanks to the HAWC Observatory for Cosmic Radiation, another probable trace of their existence has just been found: photons with some of the highest energies. (scitechdaily.com)
  • If this packet of photon hits the boundary during the propagation, it is either reflected or transmitted, determined by a pseudorandom number. (wikipedia.org)
  • As such, it has the ability to model photon propagation through tissue quickly. (wikipedia.org)
  • The photon packet must still be in the center region after one transport mean free path l t ′ {\displaystyle l_{t}'} along the direction of the photon packet propagation for it to be converted to a point source, otherwise the Monte Carlo simulation continues. (wikipedia.org)
  • More specifically, physicists have been exploring the possibility of creating photonic qubits (quantum units of information) that can be transmitted over long distances using photons. (phys.org)
  • We think this could open new directions for making photon-photon quantum gates (which is the difficult gate in photonic quantum computing) or deterministic photon sorter devices that are essential, e.g., for quantum repeaters. (phys.org)
  • We can 'prove' the existence of quantized photons by many different experiments, such as the photoelectric effect. (physlink.com)
  • Photons, particles that represent a quantum of light, have shown great potential for the development of new quantum technologies. (phys.org)
  • The interaction between two photons can produce a lepton pair of opposite charge (left), while light-by-light scattering (middle) involves a loop of virtual charged particles and therefore the corresponding cross-section is very low. (cerncourier.com)
  • Photons are the stuff light is made of. (zmescience.com)
  • That's remarkably similar to our modern theory of light and its composing photons, a term coined thousands of years later in 1926 by a chemist named Gilbert Lewis and an optical physicist called Frithiof Wolfers. (zmescience.com)
  • Newton wasn't fond at all of the wave theory since that would mean light would be able to stray too far into the shadow. (zmescience.com)
  • For much of the 18th century, corpuscular theory dominated the debate around the nature of light. (zmescience.com)
  • The source of the 200 TeV photons turned out to be a region of the recently discovered pulsar eHWC J1825-134, visible in the southern hemisphere in the background of the Vela constellation, and lying at a distance of about 13 thousand light years from Earth. (scitechdaily.com)
  • Physicists have found that particles of light, or photons, may live for at least 1 quintillion years, and if they can die, photons may give off very light particles that could travel faster than light. (livescience.com)
  • The particles that make up light, photons, may live for at least 1 quintillion (1 billion multiplied by 1 billion) years, new research suggests. (livescience.com)
  • If photons can die, they could give off particles that travel faster than light . (livescience.com)
  • The lightest neutrino, being lighter than light, would then actually travel faster than photons," Heeck said. (livescience.com)
  • We are squeezing the light at a 'magic' level-in a very specific direction and amount-to make perfectly correlated photons with more stable intensity. (nist.gov)
  • We focus on studies of light interacting with nanoscale systems, in both experiment and theory. (lu.se)
  • In more recent times, however, QED has been viewed as an effective theory that must break down at very short distances (high energies) and be subsumed by a larger more complete theory. (encyclopedia.com)
  • If two protons travelling in opposite directions pass very close to one another, photons radiated from each proton can collide and produce new particles. (cerncourier.com)
  • The second variant of the course of events assumes that photons are born due to the interaction of protons emitted by a pulsar with matter in interstellar space. (scitechdaily.com)
  • What is particularly interesting in this scenario is that the energies of the protons must be at least an order of magnitude greater than the energies of the observed photons! (scitechdaily.com)
  • The candidate should have experience with statistical modeling and estimation theory. (merl.com)
  • Statistically sufficient numbers of photon packets must be simulated to obtain the expected values accurately. (wikipedia.org)
  • However, because of its statistical nature, this method requires tracking a large number of photon packets, making it computationally expensive. (wikipedia.org)
  • When a photon packet is within a critical depth z c {\displaystyle z_{c}} the Monte Carlo simulation tracks all packets but within the center region the photon packet is transformed to an isotropic source and subsequently treated with Diffusion Theory. (wikipedia.org)
  • The Heisenberg uncertainty principle assumes that even if a test object is bombarded with a photon, this makes the measurement blurred. (absolutetheory.com)
  • The simulation results demonstrate that the model can accurately perform the relationship between dead time and single-photon LiDAR system parameters. (hindawi.com)
  • Photon and Gravitation == According to Einstein, the photon, i.e. sun rays, is subject to gravity. (absolutetheory.com)
  • Of course we know gravity exists -- so if you believe that gravity is described by a quantum field theory we've 'detected' gravitons. (physlink.com)
  • Since, according to the theory of relativity, nothing occurs in absolute calm, it is only of a theoretical nature. (absolutetheory.com)
  • These properties make them suitable candidates for Single Photon Sources (SPS) and Entangled Photons Sources (EPS). (mdpi.com)
  • Single photon sources (SPS) based on semiconductor quantum dot (QD) platforms are restricted to low temperature (T) operation due to the presence of strong dephasing processes. (mdpi.com)
  • In this case, the fate of the photon becomes the long-standing question of many-body localization, originally formulated as a gedanken experiment for the lifetime of a single Fermi-liquid quasiparticle confined to a quantum dot 2 . (nature.com)
  • Different components in typical beamline and neutron guide are introduced in addition to the optical theory that describes them and underliing design and optimisation of beamline and neutron guide. (lu.se)
  • Spectroscopic signatures of localization with interacting photons in superconducting qubits. (nature.com)
  • It used to be said that the photon has an undefined mass, since it is divided by zero according to the connection between mass and rest mass. m = m (0) / relativistic root. (absolutetheory.com)
  • The Hybrid Theory combines the Diffusion Theory and the Monte Carlo method in order to increase accuracy near the source and boundaries while reducing computation time. (wikipedia.org)
  • When a photon packet is scattered into the center zone z c ≤ z ≤ − z c {\displaystyle z_{c}\leq z\leq -z_{c}} , it is conditionally converted to an isotropic point source. (wikipedia.org)
  • Before the conversion to an isotropic point source, the photon packet reduces its weight due to its interaction with the scattering medium. (wikipedia.org)
  • Based on data collected by the HAWC, we were able to determine the source of photons with energies of about 200 teraelectronvolts. (scitechdaily.com)
  • So, once the direction from which the photons are coming is identified within a galaxy, it is usually possible to determine their source. (scitechdaily.com)
  • We have been working on the deterministic interfacing of single quantum emitters (quantum dots) to single photons for over 15 years and have developed a very powerful method based on nanophotonic waveguides ," Peter Lodahl, one of the researchers who carried out the study, told Phys.org. (phys.org)
  • The Computational Sensing Team at MERL is seeking an intern to work on estimation algorithms for single-photon lidar. (merl.com)
  • Compared with the impulse LiDAR, the single-photon LiDAR has higher measurement sensitivity in the prominent feature, especially for space-based long-distance imaging. (hindawi.com)
  • The ranging of single-photon LiDAR is mainly different from the photon ranging of pulsed LiDAR. (hindawi.com)
  • The research results can prove the design and verification of single-photon LiDAR dead time. (hindawi.com)
  • It is worth noting that the single-photon LiDAR can be used for relative position and velocity control in spacecraft rendezvous and docking with high precision, which can also be adopted in distributed space systems, e.g., satellite constellation, satellite swarm, and federated satellite, including many satellites distributed in different orbits cooperating with each other to perform a very complex space mission [ 3 - 5 ]. (hindawi.com)
  • However, the measurement of single-photon LiDAR may cause measurement errors or input delay. (hindawi.com)
  • In fact, the single-photon LiDAR can make sense to provide the state information [ 7 - 9 ]. (hindawi.com)