Space-time correlations in monitored kinetically constrained discrete-time quantum dynamics
- URL: http://arxiv.org/abs/2408.09872v1
- Date: Mon, 19 Aug 2024 10:24:07 GMT
- Title: Space-time correlations in monitored kinetically constrained discrete-time quantum dynamics
- Authors: Marcel Cech, María Cea, Mari Carmen Bañuls, Igor Lesanovsky, Federico Carollo,
- Abstract summary: We show a kinetically constrained many-body quantum system that has a natural implementation on Rydberg quantum simulators.
Despite featuring an uncorrelated infinite-temperature average stationary state, the dynamics displays coexistence of fast and slow space-time regions.
Our work establishes the large deviation framework for discrete-time open quantum many-body systems as a means to characterize complex dynamics and collective phenomena in quantum processors and simulators.
- Score: 0.0
- License: http://creativecommons.org/licenses/by-sa/4.0/
- Abstract: State-of-the-art quantum simulators permit local temporal control of interactions and midcircuit readout. These capabilities open the way towards the exploration of intriguing nonequilibrium phenomena. We illustrate this with a kinetically constrained many-body quantum system that has a natural implementation on Rydberg quantum simulators. The evolution proceeds in discrete time and is generated by repeatedly entangling the system with an auxiliary environment that is monitored and reset after each time-step. Despite featuring an uncorrelated infinite-temperature average stationary state, the dynamics displays coexistence of fast and slow space-time regions in stochastic realizations of the system state. The time-record of measurement outcomes on the environment serves as natural probe for such dynamical heterogeneity, which we characterize using tools from large deviation theory. Our work establishes the large deviation framework for discrete-time open quantum many-body systems as a means to characterize complex dynamics and collective phenomena in quantum processors and simulators.
Related papers
- Engineering Transport via Collisional Noise: a Toolbox for Biology
Systems [44.99833362998488]
We study a generalised XXZ model in the presence of collision noise, which allows to describe environments beyond the standard Markovian formulation.
Results constitute an example of the essential building blocks for the understanding of quantum transport in noisy and warm disordered environments.
arXiv Detail & Related papers (2023-11-15T12:55:28Z) - Quantum simulations of interacting systems with broken time-reversal
symmetry [0.0]
We realize quantum simulations of interacting, time-reversal broken quantum systems in a universal trapped-ion quantum processor.
Our results open a path towards simulation of time-reversal broken many-body systems with a wide range of features and coupling geometries.
arXiv Detail & Related papers (2022-05-23T10:29:34Z) - Neural-Network Quantum States for Periodic Systems in Continuous Space [66.03977113919439]
We introduce a family of neural quantum states for the simulation of strongly interacting systems in the presence of periodicity.
For one-dimensional systems we find very precise estimations of the ground-state energies and the radial distribution functions of the particles.
In two dimensions we obtain good estimations of the ground-state energies, comparable to results obtained from more conventional methods.
arXiv Detail & Related papers (2021-12-22T15:27:30Z) - Observation of Time-Crystalline Eigenstate Order on a Quantum Processor [80.17270167652622]
Quantum-body systems display rich phase structure in their low-temperature equilibrium states.
We experimentally observe an eigenstate-ordered DTC on superconducting qubits.
Results establish a scalable approach to study non-equilibrium phases of matter on current quantum processors.
arXiv Detail & Related papers (2021-07-28T18:00:03Z) - Time periodicity from randomness in quantum systems [0.0]
Many complex systems can spontaneously oscillate under non-periodic forcing.
We show that this behavior can emerge within the repeated-interaction description of open quantum systems.
Specifically, we consider a many-body quantum system that undergoes dissipation due to sequential coupling with auxiliary systems at random times.
arXiv Detail & Related papers (2021-04-27T18:02:31Z) - Influence functional of many-body systems: temporal entanglement and
matrix-product state representation [0.0]
Feynman-Vernon influence functional (IF) was originally introduced to describe the effect of a quantum environment on the dynamics of an open quantum system.
We apply the IF approach to describe quantum many-body dynamics in isolated spin systems.
arXiv Detail & Related papers (2021-03-25T10:41:15Z) - Preparing random states and benchmarking with many-body quantum chaos [48.044162981804526]
We show how to predict and experimentally observe the emergence of random state ensembles naturally under time-independent Hamiltonian dynamics.
The observed random ensembles emerge from projective measurements and are intimately linked to universal correlations built up between subsystems of a larger quantum system.
Our work has implications for understanding randomness in quantum dynamics, and enables applications of this concept in a wider context.
arXiv Detail & Related papers (2021-03-05T08:32:43Z) - Continuous-time dynamics and error scaling of noisy highly-entangling
quantum circuits [58.720142291102135]
We simulate a noisy quantum Fourier transform processor with up to 21 qubits.
We take into account microscopic dissipative processes rather than relying on digital error models.
We show that depending on the dissipative mechanisms at play, the choice of input state has a strong impact on the performance of the quantum algorithm.
arXiv Detail & Related papers (2021-02-08T14:55:44Z) - Bridging the Gap Between the Transient and the Steady State of a
Nonequilibrium Quantum System [58.720142291102135]
Many-body quantum systems in nonequilibrium remain one of the frontiers of many-body physics.
Recent work on strongly correlated electrons in DC electric fields illustrated that the system may evolve through successive quasi-thermal states.
We demonstrate an extrapolation scheme that uses the short-time transient calculation to obtain the retarded quantities.
arXiv Detail & Related papers (2021-01-04T06:23:01Z) - Quantum time crystals with programmable disorder in higher dimensions [0.0]
We present fresh evidence for the presence of discrete quantum time crystals in two spatial dimensions.
They are intricate quantum systems that break discrete time translation symmetry in driven quantum many-body systems undergoing non-equilibrium dynamics.
arXiv Detail & Related papers (2020-04-15T18:02:07Z) - Many-Body Dephasing in a Trapped-Ion Quantum Simulator [0.0]
How a closed interacting quantum many-body system relaxes and dephases as a function of time is a fundamental question in thermodynamic and statistical physics.
We analyse and observe the persistent temporal fluctuations after a quantum quench of a tunable long-range interacting transverse-field Ising Hamiltonian realized with a trapped-ion quantum simulator.
arXiv Detail & Related papers (2020-01-08T12:33:28Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.