Dissipation-Driven Transition of Particles from Dispersive to Flat Bands

• URL: http://arxiv.org/abs/2504.00796v3
• Date: Sun, 06 Apr 2025 07:53:15 GMT
• Title: Dissipation-Driven Transition of Particles from Dispersive to Flat Bands
• Authors: Yutao Hu, Chao Yang, Yucheng Wang,
• Abstract summary: We show that bond dissipation can drive particles from dispersive bands into flat bands.<n>This opens a new avenue for exploring FB physics in open quantum systems.
• Score: 11.179995894494072
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Flat bands (FBs) play a crucial role in condensed matter physics, offering an ideal platform to study strong correlation effects and enabling applications in diffraction-free photonics and quantum devices. However, the study and application of FB properties are susceptible to interference from dispersive bands. Here, we explore the impact of bond dissipation on systems hosting both flat and dispersive bands by calculating the steady-state density matrix. We demonstrate that bond dissipation can drive particles from dispersive bands into FBs and establish the general conditions for this phenomenon to occur. Our results demonstrate that dissipation can facilitate FB preparation, property measurement, and utilization. This opens a new avenue for exploring FB physics in open quantum systems, with potential implications for strongly correlated physics.

Related papers

• Stability of Floquet sidebands and quantum coherence in 1D strongly interacting spinless fermions [0.0]
  We investigate the impact of electron-electron interactions and perturbations in the coherence of the driving on the lifetime of Floquet-Bloch sidebands (FBs)<n>At high-frequency driving we obtain clearly separated, long-lived FBs of the full many-body excitation continuum.<n>The emerging picture is further elucidated by the behavior of real-space single-particle propagators.
  arXiv  Detail & Related papers  (2025-02-18T08:50:21Z)
• Solid-state platform for cooperative quantum dynamics driven by correlated emission [3.609024579243597]
  We set the stage for the exploration of analogous cooperative phenomena in hybrid solid-state platforms.<n>We develop a comprehensive formalism for the quantum many-body dynamics of an ensemble of solid-state spin defects.<n>Our work lays the foundation for a multi-qubit approach to quantum sensing of solid-state systems.
  arXiv  Detail & Related papers  (2023-09-16T13:12:42Z)
• Neural-network quantum states for ultra-cold Fermi gases [49.725105678823915]
  This work introduces a novel Pfaffian-Jastrow neural-network quantum state that includes backflow transformation based on message-passing architecture. We observe the emergence of strong pairing correlations through the opposite-spin pair distribution functions. Our findings suggest that neural-network quantum states provide a promising strategy for studying ultra-cold Fermi gases.
  arXiv  Detail & Related papers  (2023-05-15T17:46:09Z)
• Fractional Quantum Zeno Effect Emerging from Non-Hermitian Physics [12.706932285002544]
  We predict quantum non-Hermitian phenomena: the fractional quantum Zeno (FQZ) effect and FQZ-induced photon antibunching. We find FQZ-induced strong photon antibunching in the steady state of a driven emitter even for weak nonlinearities. Remarkably, we identify that the sub-Poissonian quantum statistics of photons, which has no classical analogs, stems here from the key role of non-Hermiticity.
  arXiv  Detail & Related papers  (2022-07-07T17:41:24Z)
• Formation of robust bound states of interacting microwave photons [148.37607455646454]
  One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
  arXiv  Detail & Related papers  (2022-06-10T17:52:29Z)
• Giant boost of the quantum metric in disordered one dimensional flat band systems [0.0]
  In flat band (FB) systems, the conductivity at the FB energy is robust against the disorder and can even be tremendously boosted. The singular behaviour of the quantum metric of the FB eigenstates is found to be at the heart of these unexpected and puzzling features. Our findings should have interesting fallout for other physical systems, and may as well open up engineering strategies to boost the critical temperature in two dimensional superconducting FB materials.
  arXiv  Detail & Related papers  (2022-05-12T15:37:15Z)
• Bridging the reality gap in quantum devices with physics-aware machine learning [0.0]
  Disorder induced by the unpredictable distribution of material defects is one of the major contributions to the reality gap. We bridge this gap using an approach combining a physical model, deep learning, Gaussian random field, and Bayesian inference. This approach has enabled us to infer the disorder potential of a nanoscale electronic device from electron transport data.
  arXiv  Detail & Related papers  (2021-11-22T15:45:01Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• Correlation engineering via non-local dissipation [0.0]
  Correlations are usually destroyed by dissipation arising from coupling between a system and its environment. We show that dissipation can instead be used to engineer a wide variety of correlation profiles in an easily tunable manner.
  arXiv  Detail & Related papers  (2021-01-16T13:08:38Z)
• Subdiffusion via Disordered Quantum Walks [52.77024349608834]
  We experimentally prove the feasibility of disordered quantum walks to realize a quantum simulator that is able to model general subdiffusive phenomena. Our experiment simulates such phenomena by means of a finely controlled insertion of various levels of disorder during the evolution of the walker. This allows us to explore the full range of subdiffusive behaviors, ranging from anomalous Anderson localization to normal diffusion.
  arXiv  Detail & Related papers  (2020-07-24T13:56:09Z)
• 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)
• Quantum transport in flat bands and super-metallicity [0.0]
  Quantum physics in flat-band (FB) systems embodies a variety of exotic phenomenon and even counter intuitive features. The quantum transport in several graphene based compounds that exhibit a flat band and a tunable gap is investigated.
  arXiv  Detail & Related papers  (2020-07-10T11:17:30Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.