Quantum many body scar

Author: gapo

August undefined, 2024

WebDec 21, 2024 · Weakly interacting quasiparticles play a central role in the low-energy description of many phases of quantum matter. At higher energies, however, quasiparticles cease to be well defined in generic many-body systems owing to a proliferation of decay channels. In this review, we discuss the phenomenon of quantum many-body scars, which … WebOct 1, 2024 · It is shown that the nearby many-body scar states can be well approximated as "quasiparticle excitations" on top of the exact E=0 scar states and proposed a quasiparticles explanation of the strong oscillations observed in experiments. A recent experiment in the Rydberg atom chain observed unusual oscillatory quench dynamics with a charge density …

Prominent quantum many-body scars in a truncated Schwinger …

WebAug 11, 2024 · First, we show that the quantum many-body scar states can be tracked to a set of quantum critical states, whose nature can be understood as pair-wisely occupied Fermi sea states. Second, we show ... WebNov 6, 2024 · I will present simple structure underlying many models with quantum many-body scar towers such as the AKLT chain and the spin-1 XY model. In the latter case, the mechanism can be also stated as a particular removal of symmetry, and I will discuss new examples of electronic extended Hubbard models with eta-pairing states as true scars … deaths in lebanon ohio

Weak ergodicity breaking from quantum many-body scars

WebJan 10, 2024 · Quantum many-body scarring (QMBS) -- a recently discovered form of weak ergodicity breaking in strongly-interacting quantum systems -- presents opportunities for … WebOct 13, 2024 · Quantum many-body scarring (QMBS) is a recently discovered form of weak ergodicity breaking in strongly interacting quantum systems, which presents opportunities … WebSep 23, 2024 · When J R ≫ Ω, a kinematic constraint develops that leads to the formation of quantum many-body scars. (b) Diagram of the dynamical regimes obtained in this work as … deaths in las vegas nv in the last 2 weeks

Quantum many body scar

WebIn most quantum sensing schemes, interactions between the constituent particles of the sensor are expected to degrade sensitivity. We show that the phenomenon of many-body scarring can be exploited for quantum sensing that is robust against certain strong interactions. In the ideal case of perfect scars with harmonic energy gaps, the optimal … WebNov 18, 2024 · Recent discovery of persistent revivals in quantum simulators based on Rydberg atoms have pointed to the existence of a new type of dynamical behavior that …

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WebMay 14, 2024 · We show that many-body scars appear in the Fibonacci chain, a model with a constrained local Hilbert space that has recently been experimentally realized in a … WebApr 12, 2024 · Quantum many-body scars [6{9] provide yet another example, without any conservation laws (but generically also without any notion of robustness). Still more recently, it was realized that the interplay of nitely many ‘multipolar’ conservation laws could break ergodicity [10], a result that was

WebApr 29, 2024 · Quantum many-body scar states are special eigenstates of nonintegrable models with distinctive entanglement features that give rise to infinitely long-lived coherent dynamics under quantum ... WebJun 28, 2024 · Quantum many-body scars states in such a system were first observed experimentally on, where the initial state is N ́eel state. Surprisingly, instead of evolving into a thermal state, the time evolution state oscillates between two N ́eel states. To investigate the Many body scar states, one feasible way to do it is using quantum computers ...

WebDec 19, 2024 · Quantum many-body scar (QMBS) and quantum integrability (QI) have been recognized as two distinct mechanisms for the breakdown of eigenstate thermalization … The area of quantum many-body scars is a subject of active research. Scars have occurred in investigations for potential applications of Rydberg states to quantum computing, specifically acting as qubits for quantum simulation. The particles of the system in an alternating ground state-Rydberg state configuration continually entangled and disentangled rather than remaining entangled and undergoing thermalization. Systems of the same atoms prepared …

WebFeb 8, 2024 · Halfway between one-body and many-body models, one finds systems such as two-dimensional harmonic oscillators and the Dicke model 29, where quantum scars have also been observed 30,31.

WebAbstract. As a paradigm of weak ergodicity breaking in disorder-free nonintegrable models, quantum many-body scars (QMBS) can offer deep insights into the thermalization dynamics of gauge theories. Having been first discovered in a spin- 1/2 quantum link formulation of the Schwinger model, it is a fundamental question as to whether QMBS persist ... genetic history of breast cancerWebSep 23, 2024 · These oscillations have been attributed to a special set of nonergodic states, referred to as quantum many-body scars. Although these states have enriched our understanding of thermalization in ... deaths in last 24 hours from coronavirusWebJul 1, 2024 · The discovery of quantum many-body scars (QMBS) both in Rydberg atom simulators and in the Affleck–Kennedy–Lieb–Tasaki spin-1 chain model, have shown that a weak violation of ergodicity can still lead to rich experimental and theoretical physics. deaths in leamington spaWebNov 15, 2024 · Fate of quantum many-body scars in the presence of disorder Nov 2024 Experiments performed on strongly interacting … deaths in lebanon county paWebQuantum many-body scars are analogous to the phenomenon of classical scars in single-particle quantum chaos, where scars represent a concentration of some eigenfunctions … genetic history of europeansWebMar 7, 2024 · Robust quantum many-body scars in the one-dimensional spin-1 Kitaev model. Experimental observation of coherent oscillations in a Rydberg atom chain [Bernien et al., … genetic history of scotlandWebQuantum many-body scars are analogous to the phenomenon of classical scars in single-particle quantum chaos, where scars represent a concentration of some eigenfunctions along the trajectory of classical periodic orbits. Similarly, in the quantum many-body case, the initial Neel state has a large component of these specific scar states. genetic history of the african diaspora