Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication

• URL: http://arxiv.org/abs/2201.13365v1
• Date: Mon, 31 Jan 2022 17:24:29 GMT
• Title: Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication
• Authors: Matteo Piccolini, Farzam Nosrati, Roberto Morandotti, Rosario Lo Franco
• Abstract summary: 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We extend a procedure exploiting spatial indistinguishability of identical particles to recover the spoiled entanglement between two qubits interacting with Markovian noisy environments. Here, the spatially localized operations and classical communication (sLOCC) operational framework is used to activate the entanglement restoration from the indistinguishable constituents. We consider the realistic scenario where noise acts for the whole duration of the process. Three standard types of noises are considered: a phase damping, a depolarizing, and an amplitude damping channel. Within this general scenario, we find the entanglement to be restored in an amount proportional to the degree of spatial indistinguishability. These results elevate sLOCC to a practical framework for accessing and utilizing quantum state protection within a quantum network of spatially indistinguishable subsystems.

Related papers

• Virtual entanglement purification via noisy entanglement [0.16777183511743468]
  We present a protocol utilizing virtual operations that purifies noisy entanglement at the level of expectation values. Our protocol bridges the gap between DQC with entanglement and with circuit knitting, thus providing a flexible way for further scalability in the presence of hardware limitations.
  arXiv  Detail & Related papers  (2024-11-15T08:09:36Z)
• 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)
• Entanglement and localization in long-range quadratic Lindbladians [49.1574468325115]
  Signatures of localization have been observed in condensed matter and cold atomic systems. We propose a model of one-dimensional chain of non-interacting, spinless fermions coupled to a local ensemble of baths. We show that the steady state of the system undergoes a localization entanglement phase transition by tuning $p$ which remains stable in the presence of coherent hopping.
  arXiv  Detail & Related papers  (2023-03-13T12:45:25Z)
• 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)
• Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
  We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
  arXiv  Detail & Related papers  (2022-09-06T18:18:41Z)
• Frequency estimation under non-Markovian spatially correlated quantum noise: Restoring superclassical precision scaling [0.0]
  We study the Ramsey estimation precision attainable by entanglement-enhanced interferometry in the presence of correlatedly non-classical noise. In a paradigmatic case of spin-boson dephasovian noise from a thermal environment, we find that it is possible to suppress, on average, the effect of correlations by randomizing the location of probes.
  arXiv  Detail & Related papers  (2022-04-22T16:25:16Z)
• Probing tripartite entanglement and coherence dynamics in pure and mixed independent classical environments [0.40631409309544836]
  We address the dynamics of entanglement and coherence for three non-interacting qubits initially prepared as maximally entangled GHZ-like state. We show that the current mixed noise cases are more detrimental than pure ones where entanglement and coherence are found short-lived.
  arXiv  Detail & Related papers  (2021-07-23T14:18:40Z)
• Entanglement robustness via spatial deformation of identical particle wave functions [0.0]
  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.
  arXiv  Detail & Related papers  (2021-04-20T01:51:39Z)
• 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)
• Non-Local Part-Aware Point Cloud Denoising [55.50360085086123]
  This paper presents a novel non-local part-aware deep neural network to denoise point clouds. We design the non-local learning unit (NLU) customized with a graph attention module to adaptively capture non-local semantically-related features. To enhance the denoising performance, we cascade a series of NLUs to progressively distill the noise features from the noisy inputs.
  arXiv  Detail & Related papers  (2020-03-14T13:51:50Z)

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.