Dephasing enhanced transport in boundary-driven quasiperiodic chains
- URL: http://arxiv.org/abs/2106.11406v2
- Date: Tue, 9 Nov 2021 12:33:10 GMT
- Title: Dephasing enhanced transport in boundary-driven quasiperiodic chains
- Authors: Artur M. Lacerda, John Goold, Gabriel T. Landi
- Abstract summary: We study dephasing-enhanced transport in boundary-driven quasi-periodic systems.
The interplay between dephasing and quasi-periodicity gives rise to a maximum of the diffusion coefficient for finite dephasing.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study dephasing-enhanced transport in boundary-driven quasi-periodic
systems. Specifically we consider dephasing modelled by current preserving
Lindblad dissipators acting on the non-interacting Aubry-Andr\'e-Harper (AAH)
and Fibonacci bulk systems. The former is known to undergo a critical
localization transition with a suppression of ballistic transport above a
critical value of the potential. At the critical point, the presence of
non-ergodic extended states yields anomalous sub-diffusion. The Fibonacci
model, on the other hand, yields anomalous transport with a continuously
varying exponent depending on the potential strength. By computing the
covariance matrix in the non-equilibrium steady-state, we show that
sufficiently strong dephasing always renders the transport diffusive. The
interplay between dephasing and quasi-periodicity gives rise to a maximum of
the diffusion coefficient for finite dephasing, which suggests the combination
of quasi-periodic geometries and dephasing can be used to control
noise-enhanced transport.
Related papers
- Dephasing-assisted transport in a tight-binding chain with a linear potential [0.0]
We study the interplay between bulk dephasing and a linear potential in a boundary-driven tight-binding chain.
A linear potential induces Wannier-Stark localization in the absence of noise, while dephasing induces diffusive transport in the absence of a tilt.
arXiv Detail & Related papers (2024-07-31T16:07:09Z) - Entanglement and operator correlation signatures of many-body quantum Zeno phases in inefficiently monitored noisy systems [49.1574468325115]
The interplay between information-scrambling Hamiltonians and local continuous measurements hosts platforms for exotic measurement-induced phase transition.
We identify a non-monotonic dependence on the local noise strength in both the averaged entanglement and operator correlations.
The analysis of scaling with the system size in a finite length chain indicates that, at finite efficiency, this effect leads to distinct MiPTs for operator correlations and entanglement.
arXiv Detail & Related papers (2024-07-16T13:42:38Z) - Universal stability of coherently diffusive 1D systems with respect to decoherence [0.0]
We show that transport is exceptionally stable against decoherent noise when coherent diffusion is present.
Our results might shed new light on the functionality of many biological systems, which often operate at the border between the ballistic and localized regimes.
arXiv Detail & Related papers (2023-07-11T15:49:51Z) - Noise Induced Universal Diffusive Transport in Fermionic Chains [0.0]
We develop a microscopic transport theory in a randomly driven fermionic model with and without linear potential.
The universal diffusive behavior is attributed to a noise-induced bound state arising in the operator equations of motion at small momentum.
We then characterize the fate of Stark localization in the presence of noise.
arXiv Detail & Related papers (2023-04-05T18:04:50Z) - Reminiscence of classical chaos in driven transmons [117.851325578242]
We show that even off-resonant drives can cause strong modifications to the structure of the transmon spectrum rendering a large part of it chaotic.
Results lead to a photon number threshold characterizing the appearance of chaos-induced quantum demolition effects.
arXiv Detail & Related papers (2022-07-19T16:04:46Z) - Large Random Arrowhead Matrices: Multifractality, Semi-Localization, and
Protected Transport in Disordered Quantum Spins Coupled to a Cavity [0.0]
We provide an exact solution of large random arrowhead Hamiltonians with diagonal disorder, a minimal model for inhomogeneously broadened quantum emitters coupled to a cavity mode.
We show that dark states can provide the major contribution to long-distance transport in disordered systems.
arXiv Detail & Related papers (2021-05-18T11:25:12Z) - Interplay between transport and quantum coherences in free fermionic
systems [58.720142291102135]
We study the quench dynamics in free fermionic systems.
In particular, we identify a function, that we dub emphtransition map, which takes the value of the stationary current as input and gives the value of correlation as output.
arXiv Detail & Related papers (2021-03-24T17:47:53Z) - Time-Dependent Dephasing and Quantum Transport [68.8204255655161]
We show that non-Markovian dephasing assisted transport manifests only in the non-symmetric configuration.
We find similar results by considering a controllable and experimentally implementable system.
arXiv Detail & Related papers (2021-02-20T22:44:08Z) - Probing eigenstate thermalization in quantum simulators via
fluctuation-dissipation relations [77.34726150561087]
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems.
Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations.
Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
arXiv Detail & Related papers (2020-07-20T18:00:02Z) - Long-range interaction in an open boundary-driven Heisenberg spin
lattice: A far-from-equilibrium transition to ballistic transport [62.997667081978825]
We study an open Heisenberg XXZ spin chain with long-range Ising-type interaction.
We find that the chain lengths for this transition are increasing with decreasing range of the Ising-type interactions between distant spins.
The transition can be explained by the suppression of ferromagnetic domains at the edges of the chain.
arXiv Detail & Related papers (2020-04-27T12:22:50Z)
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.