Entanglement robustness via spatial deformation of identical particle wave functions

• URL: http://arxiv.org/abs/2104.09714v1
• Date: Tue, 20 Apr 2021 01:51:39 GMT
• Title: Entanglement robustness via spatial deformation of identical particle wave functions
• Authors: Matteo Piccolini, Farzam Nosrati, Giuseppe Compagno, Patrizia Livreri, Roberto Morandotti, and Rosario Lo Franco
• Abstract summary: We take two initially separated and entangled identical qubits interacting with two independent noisy environments. After the interaction, we deform the wave functions of the two qubits to make them spatially overlap. We show that spatial indistinguishability of identical qubits can be utilized within the sLOCC operational framework to partially recover the quantum correlations spoiled by the environment.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We address the problem of entanglement protection against surrounding noise by a procedure suitably exploiting spatial indistinguishability of identical subsystems. To this purpose, we take two initially separated and entangled identical qubits interacting with two independent noisy environments. Three typical models of environments are considered: amplitude damping channel, phase damping channel and depolarizing channel. After the interaction, we deform the wave functions of the two qubits to make them spatially overlap before performing spatially localized operations and classical communication (sLOCC) and eventually computing the entanglement of the resulting state. This way, we show that spatial indistinguishability of identical qubits can be utilized within the sLOCC operational framework to partially recover the quantum correlations spoiled by the environment. A general behavior emerges: the higher the spatial indistinguishability achieved via deformation, the larger the amount of recovered entanglement.

Related papers

• Correlated noise enhances coherence and fidelity in coupled qubits [5.787049285733455]
  Noise correlation can enhance the fidelity and purity of a maximally entangled (Bell) state. These observations may be useful in the design of high-fidelity quantum gates and communication protocols.
  arXiv  Detail & Related papers  (2023-08-01T21:13:35Z)
• Spectral Enhanced Rectangle Transformer for Hyperspectral Image Denoising [64.11157141177208]
  We propose a spectral enhanced rectangle Transformer to model the spatial and spectral correlation in hyperspectral images. For the former, we exploit the rectangle self-attention horizontally and vertically to capture the non-local similarity in the spatial domain. For the latter, we design a spectral enhancement module that is capable of extracting global underlying low-rank property of spatial-spectral cubes to suppress noise.
  arXiv  Detail & Related papers  (2023-04-03T09:42:13Z)
• Autonomous coherence protection of a two-level system in a fluctuating environment [68.8204255655161]
  We re-examine a scheme originally intended to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits) We demonstrate that this scheme is far more powerful and can also protect a single (or even an ensemble) qubit's energy levels from noise which depends on both time and space.
  arXiv  Detail & Related papers  (2023-02-08T01:44:30Z)
• Dynamical transitions from slow to fast relaxation in random open quantum systems [0.0]
  We study a model in which the system Hamiltonian and its couplings to the noise are random matrices whose entries decay as power laws of distance. The steady state is always featureless, but the rate at which it is approached exhibits three phases depending on $alpha_H$ and $alpha_L$. Within perturbation theory, the phase boundaries in the $(alpha_H, alpha_L)$ plane differ for weak and strong dissipation, suggesting phase transitions as a function of noise strength.
  arXiv  Detail & Related papers  (2022-11-23T20:56:46Z)
• Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication [0.0]
  We exploit spatial indistinguishability of identical particles to recover the spoiled entanglement between two qubits interacting with Markovian noisy environments. We find the entanglement to be restored in an amount proportional to the degree of spatial indistinguishability.
  arXiv  Detail & Related papers  (2022-01-31T17:24:29Z)
• Robust Macroscopic Matter-Wave Interferometry with Solids [1.90365714903665]
  We exploit the spatial correlations that are inherent in perturbations due to distant sources to reduce their impact on the visibility of interference patterns. We develop a general framework that makes use of N+1 interferometers that may differ in their masses to correct for potential environmental fields up to order N. We also show that the same ideas can be extended to the protection of entanglement between pairs of interferometers.
  arXiv  Detail & Related papers  (2021-07-30T17:52:48Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Continuous and time-discrete non-Markovian system-reservoir interactions: Dissipative coherent quantum feedback in Liouville space [62.997667081978825]
  We investigate a quantum system simultaneously exposed to two structured reservoirs. We employ a numerically exact quasi-2D tensor network combining both diagonal and off-diagonal system-reservoir interactions with a twofold memory for continuous and discrete retardation effects. As a possible example, we study the non-Markovian interplay between discrete photonic feedback and structured acoustic phononovian modes, resulting in emerging inter-reservoir correlations and long-living population trapping within an initially-excited two-level system.
  arXiv  Detail & Related papers  (2020-11-10T12:38:35Z)
• Dynamics of spatially indistinguishable particles and entanglement protection [0.0]
  We study the dynamics of two identical qubits under paradigmatic Markovian noises. We find that spatial inability of identical qubits is a controllable intrinsic property of the system.
  arXiv  Detail & Related papers  (2020-08-17T16:55:22Z)
• Radiative topological biphoton states in modulated qubit arrays [105.54048699217668]
  We study topological properties of bound pairs of photons in spatially-modulated qubit arrays coupled to a waveguide. For open boundary condition, we find exotic topological bound-pair edge states with radiative losses. By joining two structures with different spatial modulations, we find long-lived interface states which may have applications in storage and quantum information processing.
  arXiv  Detail & Related papers  (2020-02-24T04:44:12Z)

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.