• Corpus ID: 247957808

Prominent quantum many-body scars in a truncated Schwinger model

  title={Prominent quantum many-body scars in a truncated Schwinger model},
  author={Jean-Yves Desaules and Ana Hudomal and Debasish Banerjee and Arnab Sen and Zlatko Papi'c and Jad C. Halimeh},
The high level of control and precision achievable in current synthetic quantum matter setups has enabled first attempts at quantum-simulating various intriguing phenomena in condensed matter physics, including those probing thermalization or its absence in closed quantum systems. In a recent work [Desaules et al. , arXiv:2203.08830], we have shown that quantum many-body scars— special low-entropy eigenstates that weakly break ergodicity in nonintegrable systems—arise in spinS quantum link… 
Tuning the Topological $\theta$-Angle in Cold-Atom Quantum Simulators of Gauge Theories
Jad C. Halimeh, 2, ∗ Ian P. McCulloch, Bing Yang, and Philipp Hauke 6, † Department of Physics and Arnold Sommerfeld Center for Theoretical Physics (ASC), Ludwig-Maximilians-Universität München,
Weak Ergodicity Breaking in the Schwinger Model
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
Stabilizing Gauge Theories in Quantum Simulators: A Brief Review
Quantum simulation is at the heart of the ongoing “second” quantum revolution, with various synthetic quantum matter platforms realizing evermore exotic condensed matter and particle physics
Driving quantum many-body scars
Periodic driving has been established as a powerful technique for engineering novel phases of matter and intrinsically out-of-equilibrium phenomena such as time crystals. Recent work by Bluvstein et
Tuning the Topological θ -Angle in Cold-Atom Quantum Simulators of Gauge Theories
(Dated: The topological θ -angle in gauge theories engenders a series of fundamental phenomena, including violations of charge-parity (CP) symmetry, dynamical topological transitions, and confinement–


Weak ergodicity breaking from quantum many-body scars
The thermodynamic description of many-particle systems rests on the assumption of ergodicity, the ability of a system to explore all allowed configurations in the phase space. Recent studies on
Proposal for Realizing Quantum Scars in the Tilted 1D Fermi-Hubbard Model.
It is demonstrated that correlated fermions in tilted optical lattices provide a platform for understanding the interplay of many-body scarring and other forms of ergodicity breaking, such as localization and Hilbert space fragmentation.
Quantum Many-Body Scars and Hilbert Space Fragmentation: A Review of Exact Results.
The discovery of Quantum Many-Body Scars (QMBS) both in Rydberg atom simulators and in the Affleck-Kennedy-Lieb-Tasaki (AKLT) spin-1 chain model, have shown that a weak violation of ergodicity can
Weak Ergodicity Breaking and Quantum Many-Body Scars in Spin-1 XY Magnets.
We study the spin-1 XY model on a hypercubic lattice in d dimensions and show that this well-known nonintegrable model hosts an extensive set of anomalous finite-energy-density eigenstates with
Quantum Scars from Zero Modes in an Abelian Lattice Gauge Theory on Ladders.
We consider the spectrum of a U(1) quantum link model where gauge fields are realized as S=1/2 spins and demonstrate a new mechanism for generating quantum many-body scars (high-energy eigenstates
Periodic Orbits, Entanglement, and Quantum Many-Body Scars in Constrained Models: Matrix Product State Approach.
A manifold of locally entangled spin states is introduced, representable by low-bond dimension matrix product states, and it is found that they feature isolated, unstable periodic orbits, which capture the recurrences and represent nonergodic dynamical trajectories.
Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.
A weak quasilocal deformation of the Rydberg-blockaded Hamiltonian is constructed, which makes the revivals virtually perfect and suggests the existence of an underlying nonintegrable Hamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-body Hilbert space.
Observation of unconventional many-body scarring in a quantum simulator
The ongoing quest for understanding nonequilibrium dynamics of complex quantum systems underpins the foundation of statistical physics as well as the development of quantum technology. Quantum
Observing non-ergodicity due to kinetic constraints in tilted Fermi-Hubbard chains
Using analytical calculations, this work experimentally studies the relaxation of an initial charge-density wave and finds a remarkably long-lived initial-state memory over a wide range of parameters, which can be attributed to emergent kinetic constraints.
Correspondence Principle for Many-Body Scars in Ultracold Rydberg Atoms
The theory of quantum scarring -- a remarkable violation of quantum unique ergodicity -- rests on two complementary pillars: the existence of unstable classical periodic orbits and the so-called