Monitoring-induced Entanglement Entropy and Sampling Complexity

• URL: http://arxiv.org/abs/2201.12672v2
• Date: Fri, 22 Apr 2022 14:51:04 GMT
• Title: Monitoring-induced Entanglement Entropy and Sampling Complexity
• Authors: Mathias Van Regemortel, Oles Shtanko, Luis Pedro Garcia-Pintos, Abhinav Deshpande, Hossein Dehghani, Alexey V. Gorshkov, Mohammad Hafezi
• Abstract summary: We show how the recovery of information depends on the monitoring scheme applied to register decay clicks. We demonstrate how registering the sequence of clicks from spontaneously emitted photons through a linear optical interferometer induces entanglement.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The dynamics of open quantum systems is generally described by a master equation, which describes the loss of information into the environment. By using a simple model of uncoupled emitters, we illustrate how the recovery of this information depends on the monitoring scheme applied to register the decay clicks. The dissipative dynamics, in this case, is described by pure-state stochastic trajectories and we examine different unravelings of the same master equation. More precisely, we demonstrate how registering the sequence of clicks from spontaneously emitted photons through a linear optical interferometer induces entanglement in the trajectory states. Since this model consists of an array of single-photon emitters, we show a direct equivalence with Fock-state boson sampling and link the hardness of sampling the outcomes of the quantum jumps with the scaling of trajectory entanglement.

Related papers

• Non-Exponential Decay in Finite Photonic Waveguide Arrays [31.533307102463027]
  We study a lattice with a boundary defect that transitions between regimes controlled by a single parameter.<n>We establish a unified theory confirmed by experiments in integrated waveguide arrays.<n>This provides a benchmark for emulating infinite systems and studying open systems in photonic lattices.
  arXiv  Detail & Related papers  (2025-09-08T08:43:22Z)
• Observation of photonic dynamics in dissipative quantum Rabi models [5.792293600651519]
  An open quantum Rabi model (QRM) with a strong photonic dissipation has not been experimentally explored.<n>We present the first experimental demonstration of such an open system in circuit QED.<n>The results demonstrate that the system's behavior is significantly modified by photonic dissipation.
  arXiv  Detail & Related papers  (2025-06-19T06:40:16Z)
• Stochastic Schrödinger equation for a homodyne measurement setup of strongly correlated systems [0.0]
  We numerically study the Bose-Hubbard model under continuous observation.<n>We show that time-domain analysis of the measurement signal uncovers rich dynamical features, including quantum jumps, that are obscured in ensemble-averaged spectral data.
  arXiv  Detail & Related papers  (2025-02-17T20:26:39Z)
• Transition Path and Interface Sampling of Stochastic Schrödinger Dynamics [0.0]
  We study rare transitions in Markovian open quantum systems driven with Gaussian noise. We extend their domain to systems described by Schr"odinger equations. We note significant departures from the Arrhenius law at low temperatures due to the presence of an anti-Zeno effect.
  arXiv  Detail & Related papers  (2024-11-01T10:04:28Z)
• Photonic Simulation of Localization Phenomena Using Boson Sampling [0.0]
  We propose boson sampling as an alternative compact synthetic platform performing at room temperature. By mapping the time-evolution unitary of a Hamiltonian onto an interferometer via continuous-variable gate decompositions, we present proof-of-principle results of localization characteristics of a single particle.
  arXiv  Detail & Related papers  (2024-10-17T18:00:05Z)
• 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)
• Stochastic approach to evolution of a quantum system interacting with a wave packet in squeezed number state [0.0]
  We determine filtering and master equations for a quantum system interacting with wave packet of light in a continuous-mode squeezed number state. We formulate the problem of conditional evolution of a quantum system making use of model of repeated interactions and measurements.
  arXiv  Detail & Related papers  (2023-03-21T19:42:15Z)
• Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
  We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom. We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
  arXiv  Detail & Related papers  (2023-03-13T13:06:40Z)
• Continuous simultaneous measurement of position and momentum of a particle [0.0]
  We formulate a model of a quantum particle continuously monitored by detectors measuring simultaneously its position and momentum. For sparsely distributed detectors, we use methods from renewal theory of processes to obtain some semi-analytic results. For a semi-continuous spatial distribution of meters the emergence of classical trajectories is shown.
  arXiv  Detail & Related papers  (2022-09-04T12:51:55Z)
• Decimation technique for open quantum systems: a case study with driven-dissipative bosonic chains [62.997667081978825]
  Unavoidable coupling of quantum systems to external degrees of freedom leads to dissipative (non-unitary) dynamics. We introduce a method to deal with these systems based on the calculation of (dissipative) lattice Green's function. We illustrate the power of this method with several examples of driven-dissipative bosonic chains of increasing complexity.
  arXiv  Detail & Related papers  (2022-02-15T19:00:09Z)
• Three-fold way of entanglement dynamics in monitored quantum circuits [68.8204255655161]
  We investigate the measurement-induced entanglement transition in quantum circuits built upon Dyson's three circular ensembles. We obtain insights into the interplay between the local entanglement generation by the gates and the entanglement reduction by the measurements.
  arXiv  Detail & Related papers  (2022-01-28T17:21:15Z)
• Light-matter interactions near photonic Weyl points [68.8204255655161]
  Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerated at a single momentum point, labeled as Weyl point. We analyze the dynamics of a single quantum emitter coupled to a Weyl photonic bath as a function of its detuning with respect to the Weyl point.
  arXiv  Detail & Related papers  (2020-12-23T18:51:13Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)

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.