Quantum scars and bulk coherence in a symmetry-protected topological phase

  title={Quantum scars and bulk coherence in a symmetry-protected topological phase},
  author={Jared Jeyaretnam and Jonas Richter and Arijeet Pal},
  journal={Physical Review B},
Formation of quantum scars in many-body systems provides a novel mechanism for enhancing coherence of weakly entangled states. At the same time, coherence of edge modes in certain symmetry protected topological (SPT) phases can persist away from the ground state. In this work we show the existence of many-body scars and their implications on bulk coherence in such an SPT phase. To this end, we study the eigenstate properties and the dynamics of an interacting spin-$1/2$ chain with three-site… Expand
1 Citations
Multiple quantum scar states and emergent slow thermalization in a flat-band system
Quantum many-body scars (QMBS) appear in a flat-band model with interactions on the sawtooth lattice. The flat-band model includes a compact support localized eigenstates, called compact localizedExpand


Localization and topology protected quantum coherence at the edge of hot matter.
This work demonstrates the coherent revival of an edge spin over a time scale that grows exponentially with system size, in sharp contrast to the general expectation that quantum bits strongly coupled with a hot many-body system will rapidly lose coherence. Expand
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 onExpand
Observation of a symmetry-protected topological phase of interacting bosons with Rydberg atoms
The experimental realization of a symmetry-protected topological phase of interacting bosons in a one-dimensional lattice is reported and a robust ground state degeneracy attributed to protected zero-energy edge states is demonstrated. Expand
Probing many-body dynamics on a 51-atom quantum simulator
This work demonstrates a method for creating controlled many-body quantum matter that combines deterministically prepared, reconfigurable arrays of individually trapped cold atoms with strong, coherent interactions enabled by excitation to Rydberg states, and realizes a programmable Ising-type quantum spin model with tunable interactions and system sizes of up to 51 qubits. Expand
Symmetry Protected Topological phases of Quantum Matter
We describe recent progress in our understanding of the interplay between interactions, symmetry, and topology in states of quantum matter. We focus on a minimal generalization of the celebratedExpand
Quantum Chaos and Thermalization in Isolated Systems of Interacting Particles
This review is devoted to the problem of thermalization in a small isolated conglomerate of interacting constituents. A variety of physically important systems of intensive current interest belong toExpand
Random Matrix Theory and Entanglement in Quantum Spin Chains
We compute the entropy of entanglement in the ground states of a general class of quantum spin-chain Hamiltonians — those that are related to quadratic forms of Fermi operators — between the first NExpand
Many-Body Localization and Thermalization in Quantum Statistical Mechanics
We review some recent developments in the statistical mechanics of isolated quantum systems. We provide a brief introduction to quantum thermalization, paying particular attention to the eigenstateExpand
Quantum phase transition between cluster and antiferromagnetic states
We study a Hamiltonian system describing a three spin-1/2 cluster-like interaction competing with an Ising-like exchange. We show that the ground state in the cluster phase possesses symmetryExpand
Criticality in correlated quantum matter
At quantum critical points (QCPs) quantum fluctuations exist on all length scales, from microscopic to macroscopic, which, remarkably, can be observed at finite temperatures—the regime to which allExpand