• Subir Sachdev is Herchel Smith Professor of Physics at Harvard University specializing in condensed matter. (wikipedia.org)
  • S Sachdev," Quantum Phase Transition " Cambridge University Press (1999). (ac.ir)
  • 8] Sachdev S 2011 Quantum Phase Transitions 2nd edn (Cambridge: Cambridge University Press). (ucm.es)
  • Physicist Subir Sachdev seeks to illuminate the boundary between the everyday world we live in and the arcane subatomic world of quantum physics. (harvard.edu)
  • Physicist Subir Sachdev still remembers the excitement that accompanied the discovery of high-temperature superconductors while he was working as a postdoctoral fellow at AT&T Bell Laboratories in 1986. (harvard.edu)
  • Our work can lead to quantum spin-OAM physics in twisted single-photon pulses and opens explorations for phases of light with long-range spin order. (nature.com)
  • To Sachdev, a condensed matter physicist who came to Harvard as a professor of physics in July, the excitement that pervaded the field with that discovery has not entirely dissipated, as it has resulted in a steady stream of new materials, new technology, and new findings that keep things interesting. (harvard.edu)
  • A Global Inversion-Symmetry-Broken Phase Inside the Pseudogap Region of YBa2Cu3Oy (L. Zhao, C. A. Belvin, R. Liang, D. A. Bonn, W.N. Hardy, N.P. Armitage, D. Hsieh) Nature Physics 13 , 250 (2017). (umich.edu)
  • We analytically derive the effective action in the large-N limit and show that an entanglement transition is caused by the symmetry breaking in the enlarged replica space. (aps.org)
  • In the noninteracting case with SYK2 chains, the model features a continuous O(2) symmetry between two replicas and a transition corresponding to spontaneous breaking of that symmetry upon varying the measurement rate. (aps.org)
  • In the symmetry broken phase at low measurement rate, the emergent replica criticality associated with the Goldstone mode leads to a log-scaling entanglement entropy that can be attributed to the free energy of vortices. (aps.org)
  • In the interacting case, the continuous O(2) symmetry is explicitly lowered to a discrete C4 symmetry, giving rise to volume-law entanglement entropy in the symmetry-broken phase due to the enhanced linear free energy cost of domain walls compared to vortices. (aps.org)
  • The interacting transition is described by C4 symmetry breaking. (aps.org)
  • In a superfluid phase, this symmetry is spontaneously broken. (encyclopedia.pub)
  • We demonstrate that a novel real-complex transition occurs upon MBL and profoundly affects the dynamical stability of non-Hermitian interacting systems with asymmetric hopping that respect time-reversal symmetry. (u-tokyo.ac.jp)
  • Furthermore, the real-complex transition is shown to be absent in non-Hermitian many-body systems with gain and/or loss that breaks time-reversal symmetry, even though the MBL transition still occurs. (u-tokyo.ac.jp)
  • Sachdev proposed a solvable model of a strange metal (a variant of which is now called the Sachdev-Ye-Kitaev (SYK) model), which was shown to saturate such a bound on the time to reach quantum chaos. (wikipedia.org)
  • Fermionic atoms confined in a potential created by standing wave light can undergo a phase transition to a superfluid state at a dramatically increased transition temperature. (harvard.edu)
  • The model rose to prominence in the 1980s after it was found to capture the essence of the superfluid-insulator transition in a way that was much more mathematically tractable than fermionic metal-insulator models. (encyclopedia.pub)
  • This is the case in the superfluid-Mott insulator transition in the Bose-Hubbard model, for example, which is due to interactions. (stackexchange.com)
  • He is particularly involved in studying microscopic models that display interesting quantum behavior in the bulk, such as superconducting, spin liquid, topological, superfluid or supersolid phases. (uwaterloo.ca)
  • 49. Quantum phase transition in a two-dimensional Kondo-Heisenberg model: a Schwinger-boson large-N approach, Jiangfan Wang, Yung-Yeh Chang, Chung-Yu Mou, Stefan Kirchner, and Chung-Hou Chung, Phys. (nycu.edu.tw)
  • In this paper, we have studied the dynamical phase diagram of the Su-Schrieffer-Heeger model using the notion of dynamical quantum phase transition in the ramped quench case. (ac.ir)
  • We have shown that, when the quench crosses both the critical points of the model, the phase diagram of the model includes two regions with dynamical quantum phase transition and no dynamical quantum phase transition. (ac.ir)
  • We have shown that if the sweep velocity is smaller than the critical value, the system shows dynamical quantum phase transition. (ac.ir)
  • Multifractality and quantum-to-classical crossover in the Coulomb anomaly at the Mott-Anderson metal-insulator transition, M. Amini, V. Kravtsov, and M. Müller, New J. Phys. (psi.ch)
  • 45. Tunable topological semi-metallic phases in Kondo lattice systems, Yen-Wen Lu , Po-Hao Chou , Chung-Hou Chung , Chung-Yu Mou *, Phys. (nycu.edu.tw)
  • Quantum phase transitions (QPTs) involve transformations between different states of matter that are driven by quantum fluctuations. (harvard.edu)
  • In a quantum phase transition, the role of heat is played by the fluctuations demanded by Heisenberg's uncertainty principle. (harvard.edu)
  • Classical phase transitions are driven by thermal fluctuations which die out at $T = 0$ , hence classical phase transitions don't happen at zero temperature. (stackexchange.com)
  • Quantum phase transitions are driven by quantum fluctuations which prevail at $T = 0$ and thus can lead to macroscopic change in the system (quantum phase transition). (stackexchange.com)
  • Topics include classical interatomic potentials and machine learning methods, quantum first-principles electronic structure models based on wave functions and density functional theory, Monte Carlo sampling and molecular dynamics simulations of phase transitions and free energies, fluctuations and transport properties. (harvard.edu)
  • Professor Zhao's group is interested in probing, understanding, and eventually controlling emergent electronic and magnetic phases in quantum materials, including both three-dimensional (3D) bulk and two-dimensional (2D) atomic and moire crystals. (umich.edu)
  • Dr. Melko's research interests involve strongly-correlated many-body systems, with a focus on emergent phenomena, ground state phases, phase transitions, quantum criticality, and entanglement. (uwaterloo.ca)
  • Finally, in the su(3) case we construct in detail the phase diagram of the ground state in parameter space, showing that it is determined in a simple way by the weights of the fundamental representation of su(3). (ucm.es)
  • Many of these contributions have been linked to experiments, especially to the rich phase diagrams of the high temperature superconductors. (wikipedia.org)
  • The existence of such RVB ground states, and of the deconfinement of fractionalized excitations was first established by Read and Sachdev and Wen by the connection to a Z2 gauge theory. (wikipedia.org)
  • Sachdev was also the first to show that the RVB state is an odd Z2 gauge theory, as described in Research. (wikipedia.org)
  • We construct Brownian Sachdev-Ye-Kitaev (SYK) chains subjected to continuous monitoring and explore possible entanglement phase transitions therein. (aps.org)
  • In the symmetric phase at higher measurement rate, the entanglement entropy obeys area-law scaling. (aps.org)
  • And this similarity to quantum matter without quasiparticles is not a co-incidence: for the SYK models, Sachdev had argued that the strange metal has a holographic dual description in terms of the quantum theory of black holes in a curved spacetime with 1 space dimension. (wikipedia.org)
  • A quantum phase transition is a phase transition that takes place in a system that lives in $d$ -dimensional space, but whose universal properties are described by a $(d+1)$ -dimensional field theory. (stackexchange.com)
  • Away from the transition, the quantum effects are certainly important even at finite temperature, as the corresponding classical system is described by a completely different $d$ -dimensional field theory with no imaginary time direction. (stackexchange.com)
  • The Kibble-Zurek mechanism (KZM) predicts that the average number of topological defects generated upon crossing a continuous or quantum phase transition obeys a universal scaling law with the quench time. (journaltocs.ac.uk)
  • These phases are characterized by the presence of gapless surface (or edge) states. (typeset.io)
  • Another analogy used by Sachdev, perhaps less familiar, is the change caused by heating a magnet to a high temperature, causing it to lose its magnetism. (harvard.edu)
  • In atomic systems, hyperfine transitions are typically driven through a two-photon Raman process by a laser field which is amplitude modulated at the hyperfine qubit frequency. (amazon.science)
  • Does undiscovered and novel universal behavior exist at certain phase transitions? (uwaterloo.ca)
  • Using nuclear spins to probe and tune quantum phases in rare earth pyrochlores, since 2018. (psi.ch)
  • My real objective is to present an experimental strategy to test critically whether these principles are actually at work, revolving around the famous linear resistivity characterizing the strange metal phase. (scipost.org)
  • In particular, a real-complex transition of eigenenergies of non-Hermitian systems has recently attracted growing interest motivated by their experimental realizations [1]. (u-tokyo.ac.jp)
  • Phase transitions are fascinating because they give us a window into "universal" phenomena - quantitative connections that occur between very disparate natural systems, in condensed matter and beyond. (uwaterloo.ca)
  • In the chronic phase, motoric manifestations typically include spasticity or, more unusually, akinesia and rigidity. (medscape.com)
  • So ( only when you are extremely close to the transition), the imaginary time dimension becomes unimportant and the quantum statistical properties become identical to that of the corresponding classical critical system. (stackexchange.com)
  • The RPMBT-20 Conference Website, which contains more information, is available to view [https://20thrpmbt.sciencesconf.org/resource/page?forward-action=page&forward-controller=resource&id=2&lang=en here]. (indiana.edu)
  • Sachdev argued instead that it is better to examine how rapidly the system loses quantum phase coherence, or reaches local thermal equilibrium in response to general external perturbations. (wikipedia.org)
  • I will discuss the evolution of angle-resolved transport nonreciprocity in the phase space of multi-layer graphene samples, where the flat energy band enhances Coulomb correlation and stabilizes a host of exotic quantum phases. (uky.edu)
  • However, very close the transition, the correlation length $\xi$ diverges. (stackexchange.com)
  • We show that both of these entropies scale as a log L when L tends to infinity, where the coefficient a is equal to (m − k)/2 in the ground state phase with k vanishing magnon densities. (ucm.es)
  • Sachdev has made extensive contributions to the description of the diverse varieties of entangled states of quantum matter. (wikipedia.org)
  • This connection, and other related work by Sachdev and collaborators, have led to valuable insights on the properties of electronic quantum matter, and on the nature of Hawking radiation from black holes. (wikipedia.org)
  • Atmospheric mercury in the vapor phase, and in fine and course particulate matter at Perch River, New York. (cdc.gov)
  • In one example, Sachdev said, putting a high-temperature superconductor into a weak magnetic field prompts it to switch from being a superconductor, with no resistance to an electrical current, to an insulator, with infinite resistance to an electrical current. (harvard.edu)
  • A real phase transition (not a crossover) from classical thermal gas to a condensate happens at non-zero temperature. (stackexchange.com)
  • Consider an infinitely large quantum system (at any temperature, zero or otherwise) that is near, but not necessarily at, a phase transition. (stackexchange.com)
  • Similarly, with quantum phase transitions, adding some external perturbation to a superconductor - such as applying pressure or putting it in a magnetic field - can cause its properties to change, sometimes dramatically. (harvard.edu)
  • In the two-dimensional quantum spin-Hall phase and the three-dimensional strong topological insulator, these states are robust and are insensitive to weak disorder and interactions. (typeset.io)
  • That keeps the field fresh," Sachdev said. (harvard.edu)
  • request you in free Céu Azul Verde of early or range typologies for Phase people? (bettywrightjones.com)
  • Operando characterization of heterogeneously catalyzed gas-and multi-phase reactions using nuclear magnetic resonance imaging. (uni-bremen.de)
  • We are interesting, commercial and new projects with recently conventional reliable information days as major as 2 postschool in one lending to 50 therapies nature Transition there in the decoration. (nilsvolkmann.de)