Experimental certification of nonclassicality via phase-space inequalities

• URL: http://arxiv.org/abs/2010.00259v2
• Date: Thu, 28 Jan 2021 14:41:26 GMT
• Title: Experimental certification of nonclassicality via phase-space inequalities
• Authors: Nicola Biagi, Martin Bohmann, Elizabeth Agudelo, Marco Bellini, Alessandro Zavatta
• Abstract summary: We present the first experimental implementation of the recently introduced phase-space inequalities for nonclassicality certification. We demonstrate the practicality and sensitivity of this approach by studying nonclassicality of a family of noisy and lossy quantum states of light.
• Score: 58.720142291102135
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In spite of its fundamental importance in quantum science and technology, the experimental certification of nonclassicality is still a challenging task, especially in realistic scenarios where losses and noise imbue the system. Here, we present the first experimental implementation of the recently introduced phase-space inequalities for nonclassicality certification, which conceptually unite phase-space representations with correlation conditions. We demonstrate the practicality and sensitivity of this approach by studying nonclassicality of a family of noisy and lossy quantum states of light. To this end, we experimentally generate single-photon-added thermal states with various thermal mean photon numbers and detect them at different loss levels. Based on the reconstructed Wigner and Husimi Q functions, the inequality conditions detect nonclassicality despite the fact that the involved distributions are nonnegative, which includes cases of high losses (93%) and cases where other established methods do not reveal nonclassicality. We show the advantages of the implemented approach and discuss possible extensions that assure a wide applicability for quantum science and technologies.

Related papers

• Nonclassicality in Two-Mode Stabilized Squeezed Coherent State: Quantum-to-Classical transition [0.0]
  We introduce the $Pi_rm N$ indicator, a novel measure for characterizing nonclassicality in the resulting EPR-entangled state. Our work deepens the understanding of the intricate dependence of nonclassicality on system parameters in the context of SSCS. The potential of $Pi_rm N$ holds significant promise for advancements in quantum optics and information science.
  arXiv  Detail & Related papers  (2024-04-19T10:02:13Z)
• Simulating Gaussian boson sampling quantum computers [68.8204255655161]
  We briefly review recent theoretical methods to simulate experimental Gaussian boson sampling networks. We focus mostly on methods that use phase-space representations of quantum mechanics. A brief overview of the theory of GBS, recent experiments and other types of methods are also presented.
  arXiv  Detail & Related papers  (2023-08-02T02:03:31Z)
• Experimental assessment of non-classicality in a solid-state spin qutrit [0.0]
  Non-classicality, encapsulated by negative quasiprobabilities, has been shown to underlie metrological and thermodynamical advantages. In this work, we use a nitrogen-vacancy center in diamond to realize the experimental implementation of a weak two-point measurement scheme. We experimentally show work extraction, empowered by non-classicality, beyond the classical case.
  arXiv  Detail & Related papers  (2022-07-26T15:07:48Z)
• Experimental violations of Leggett-Garg's inequalities on a quantum computer [77.34726150561087]
  We experimentally observe the violations of Leggett-Garg-Bell's inequalities on single and multi-qubit systems. Our analysis highlights the limits of nowadays quantum platforms, showing that the above-mentioned correlation functions deviate from theoretical prediction as the number of qubits and the depth of the circuit grow.
  arXiv  Detail & Related papers  (2021-09-06T14:35:15Z)
• Conditional preparation of non-Gaussian quantum optical states by mesoscopic measurement [62.997667081978825]
  Non-Gaussian states of an optical field are important as a proposed resource in quantum information applications. We propose a novel approach involving displacement of the ancilla field into the regime where mesoscopic detectors can be used. We conclude that states with strong Wigner negativity can be prepared at high rates by this technique under experimentally attainable conditions.
  arXiv  Detail & Related papers  (2021-03-29T16:59:18Z)
• Identifying nonclassicality from experimental data using artificial neural networks [52.77024349608834]
  We train an artificial neural network to classify classical and nonclassical states from their quadrature-measurement distributions. We show that the network is able to correctly identify classical and nonclassical features from real experimental quadrature data for different states of light.
  arXiv  Detail & Related papers  (2021-01-18T15:12:47Z)
• Dual form of the phase-space classical simulation problem in quantum optics [0.0]
  In quantum optics, nonclassicality of quantum states is commonly associated with negativities of phase-space quasiprobability distributions. We argue that the impossibility of any classical simulations with phase-space functions is a necessary and sufficient condition of nonclassicality.
  arXiv  Detail & Related papers  (2020-09-12T18:29:35Z)
• Neural network quantum state tomography in a two-qubit experiment [52.77024349608834]
  Machine learning inspired variational methods provide a promising route towards scalable state characterization for quantum simulators. We benchmark and compare several such approaches by applying them to measured data from an experiment producing two-qubit entangled states. We find that in the presence of experimental imperfections and noise, confining the variational manifold to physical states greatly improves the quality of the reconstructed states.
  arXiv  Detail & Related papers  (2020-07-31T17:25:12Z)
• Evaluating Single-mode Nonclassicality [0.0]
  We apply the measure to evaluate and categorize different classes of nonclassical states. We discover a class of states that can achieve the maximum nonclassicality in the limit of large mean number of excitations. We also discover that the nonclassicality of certain states can be greatly improved with a single-photon addition.
  arXiv  Detail & Related papers  (2020-06-30T11:31:18Z)
• Verifying single-mode nonclassicality beyond negativity in phase space [0.0]
  We establish a framework of nonclassicality in phase space that addresses nonclassical states comprehensively. We prove that it detects all nonclassical Gaussian states and all non-Gaussian states of arbitrary dimension remarkably. This approach can be adapted to constitute practical tests in two directions looking into particle and wave nature of bosonic systems.
  arXiv  Detail & Related papers  (2020-05-12T13:12:14Z)

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.