Information Scrambling Versus Quantum Revival Through the Lens of Operator Entanglement

• URL: http://arxiv.org/abs/2112.00802v1
• Date: Wed, 1 Dec 2021 19:48:44 GMT
• Title: Information Scrambling Versus Quantum Revival Through the Lens of Operator Entanglement
• Authors: Kanato Goto, Ali Mollabashi, Masahiro Nozaki, Kotaro Tamaoka and Mao Tian Tan
• Abstract summary: We look for quantum revivals in conformal field theories on a spatially compact manifold by using operator entanglement. We propose a modification of an effective model known as the line tension picture to explain the entanglement dynamics due to the strong scrambling effect.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this paper, we look for signatures of quantum revivals in two-dimensional conformal field theories (2d CFTs) on a spatially compact manifold by using operator entanglement. It is believed that thermalization does not occur on spatially compact manifolds as the quantum state returns to its initial state which is a phenomenon known as quantum revival. We find that in CFTs such as the free fermion CFT, the operator mutual information exhibits quantum revival in accordance with the relativistic propagation of quasiparticles while in holographic CFTs, the operator mutual information does not exhibit this revival and the quasiparticle picture breaks down. Furthermore, by computing the tripartite operator mutual information, we find that the information scrambling ability of holographic CFTs can be weakened by the finite size effect. We propose a modification of an effective model known as the line tension picture to explain the entanglement dynamics due to the strong scrambling effect and find a close relationship between this model and the wormhole (Einstein-Rosen Bridge) in the holographic bulk dual.

Related papers

• Bipartite OTOC in open quantum systems: information scrambling and irreversibility [0.0]
  We use bipartite OTOC to study information scrambling in atom-field interaction models. A relationship between information scrambling, using bipartite OTOC, and irreversibility, using entropy production, is probed under unitary dynamics.
  arXiv  Detail & Related papers  (2024-05-06T19:48:00Z)
• Demonstration of Lossy Linear Transformations and Two-Photon Interference on a Photonic Chip [78.1768579844556]
  We show that engineered loss, using an auxiliary waveguide, allows one to invert the spatial statistics from bunching to antibunching. We study the photon statistics within the loss-emulating channel and observe photon coincidences, which may provide insights into the design of quantum photonic integrated chips.
  arXiv  Detail & Related papers  (2024-04-09T06:45:46Z)
• Emergent Holographic Forces from Tensor Networks and Criticality [0.0]
  We formulate an efficiently implementable multi-scale entanglement renormalization ansatz model of AdS/CFT. We show that the bulk theory arising from this optimized tensor network furnishes excitations with attractive interactions.
  arXiv  Detail & Related papers  (2024-01-24T17:03:03Z)
• 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)
• Large-$N$ Chern insulators: lattice field theory and quantum simulation approaches to correlation effects in the quantum anomalous Hall effect [0.0]
  We give a detailed description of our multidisciplinary approach to understand the fate of the quantum anomalous Hall (QAH) phases. We show that tensor-network algorithms based on projected entangled pairs can be used to improve our understanding of the strong-coupling limit. We also present a detailed scheme that uses ultra-cold atoms in optical lattices with synthetic spin-orbit coupling to build quantum simulators.
  arXiv  Detail & Related papers  (2021-11-08T13:22:14Z)
• 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)
• Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
  We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
  arXiv  Detail & Related papers  (2021-01-21T22:18:49Z)
• Quantum gravity states, entanglement graphs and second-quantized tensor networks [0.0]
  In recent years, the import of quantum information techniques in quantum gravity opened new perspectives in the study of the microscopic structure of spacetime. We contribute to such a program by establishing a precise correspondence between the quantum information formalism of tensor networks (TN), in the case of projected entangled-pair states (PEPS) generalised to a second-quantized framework, and group field theory (GFT) states.
  arXiv  Detail & Related papers  (2020-12-23T12:20:25Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)
• Tensor network models of AdS/qCFT [69.6561021616688]
  We introduce the notion of a quasiperiodic conformal field theory (qCFT) We show that qCFT can be best understood as belonging to a paradigm of discrete holography.
  arXiv  Detail & Related papers  (2020-04-08T18:00:05Z)
• Open quantum systems and Schwinger-Keldysh holograms [0.0]
  We consider a quantum field theory coupled to a holographic field theory at finite temperature. We compute real-time correlation functions using holographic methods in strongly correlated thermal environments. Our results also provide a principled of Schwinger-Keldysh observables in gravity and holography.
  arXiv  Detail & Related papers  (2020-04-06T18:00:01Z)

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.