Quantifying entanglement of parametric down-converted states in all degrees of freedom

• URL: http://arxiv.org/abs/2004.06412v1
• Date: Tue, 14 Apr 2020 10:51:28 GMT
• Title: Quantifying entanglement of parametric down-converted states in all degrees of freedom
• Abstract summary: We quantify the amount of entanglement by the Schmidt number of the state, represented as a pure bipartite state. A quantitative example with reasonably achievable experimental conditions is considered to demonstrate that extremely large Schmidt numbers are achievable.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The amount of entanglement that exists in a parametric down-converted state is investigated in terms of all the degrees of freedom of the state. We quantify the amount of entanglement by the Schmidt number of the state, represented as a pure bipartite state by tagging the down-converted photons in terms of orthogonal states of polarization with the aid of type II phase-matching. To facilitate our calculations, we use a Wigner functional approach, which allows the incorporation of the full infinite dimensional spatiotemporal degrees of freedom. A quantitative example with reasonably achievable experimental conditions is considered to demonstrate that extremely large Schmidt numbers are achievable.

Related papers

• Maximum heralding probabilities of non-classical state generation from two-mode Gaussian state via photon counting measurements [0.0]
  Non-classical states of light can be generated via photon counting measurements on selected modes.<n>We show that the maximum heralding probability for the two-mode setting can be calculated analytically.<n>Our results show that the generation of highly complex optical quantum states with high stellar rank is practically feasible in this setting.
  arXiv  Detail & Related papers  (2025-10-02T12:21:18Z)
• SU(1,1)-displaced coherent states, photon counting and squeezing [0.0]
  We revisit the Perelomov SU (1,1) displaced coherent states as possible quantum states of light. We study the counting and squeezing properties of the states in terms of k and the number of photons in the original displaced state.
  arXiv  Detail & Related papers  (2023-04-17T07:30:37Z)
• Two-mode photon-added entangled coherent states and their entanglement properties [0.0]
  An entangled quantum state is considered by applying a local photon excitation to each mode of an entangled coherent state. It is shown that applying a photon addition can improve the amount of entanglement.
  arXiv  Detail & Related papers  (2023-04-11T08:50:51Z)
• Macroscopic maximally entangled state preparation between two atomic ensembles [0.0]
  We prepare a macroscopic maximally entangled state (MMES) between two atomic ensembles using adaptive quantum nondemolition (QND) measurements. The quantum state of the system is evolved using a sequence of QND measurements followed by adaptive unitaries.
  arXiv  Detail & Related papers  (2023-02-15T08:47:31Z)
• Entanglement phase diagrams from partial transpose moments [0.0]
  We analyze the entanglement properties of bipartite reduced states of a tripartite pure state. We show that this ratio takes well-defined values in the thermodynamic limit for various families of entangled states. Our results can be used to experimentally test necessary conditions for different types of mixed-state randomness.
  arXiv  Detail & Related papers  (2022-12-20T11:39:02Z)
• Experimental demonstration of optimal unambiguous two-out-of-four quantum state elimination [52.77024349608834]
  A core principle of quantum theory is that non-orthogonal quantum states cannot be perfectly distinguished with single-shot measurements. Here we implement a quantum state elimination measurement which unambiguously rules out two of four pure, non-orthogonal quantum states.
  arXiv  Detail & Related papers  (2022-06-30T18:00:01Z)
• Stroboscopic quantum nondemolition measurements for enhanced entanglement generation between atomic ensembles [3.0734813171130204]
  We develop a measurement operator formalism to handle quantum nondemolition (QND) measurement induced entanglement generation between two atomic gases. We show several mathematical identities which greatly simplify the state evolution in the projection sequence. Our formalism does not use the Holstein-Primakoff approximation as is conventionally done, and treats the spins of the atomic gases in an exact way.
  arXiv  Detail & Related papers  (2021-10-18T06:30:20Z)
• Catalytic Transformations of Pure Entangled States [62.997667081978825]
  Entanglement entropy is the von Neumann entropy of quantum entanglement of pure states. The relation between entanglement entropy and entanglement distillation has been known only for the setting, and the meaning of entanglement entropy in the single-copy regime has so far remained open. Our results imply that entanglement entropy quantifies the amount of entanglement available in a bipartite pure state to be used for quantum information processing, giving results an operational meaning also in entangled single-copy setup.
  arXiv  Detail & Related papers  (2021-02-22T16:05:01Z)
• 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)
• Quantum Discrimination of Two Noisy Displaced Number States [68.2727599930504]
  We first consider the quantum discrimination of two noiseless displaced number states. We then address the problem of discriminating between two noisy displaced number states.
  arXiv  Detail & Related papers  (2020-12-09T16:56:16Z)
• Bose-Einstein condensate soliton qubit states for metrological applications [58.720142291102135]
  We propose novel quantum metrology applications with two soliton qubit states. Phase space analysis, in terms of population imbalance - phase difference variables, is also performed to demonstrate macroscopic quantum self-trapping regimes.
  arXiv  Detail & Related papers  (2020-11-26T09:05:06Z)
• Gaussian Process States: A data-driven representation of quantum many-body physics [59.7232780552418]
  We present a novel, non-parametric form for compactly representing entangled many-body quantum states. The state is found to be highly compact, systematically improvable and efficient to sample. It is also proven to be a universal approximator' for quantum states, able to capture any entangled many-body state with increasing data set size.
  arXiv  Detail & Related papers  (2020-02-27T15:54:44Z)

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.