Study of multiple degrees of freedom entanglement in optical fiber

• URL: http://arxiv.org/abs/2404.11073v1
• Date: Wed, 17 Apr 2024 05:11:27 GMT
• Title: Study of multiple degrees of freedom entanglement in optical fiber
• Authors: Huimin Zhang, Chaoying Zhao,
• Abstract summary: orbital angular momentum (OAM) has attracted widespread attention due to its ability to carry information in multiple dimensions. Ensuring the stability and high fidelity of entangled states after transmission is a crucial part of quantum communication.
• Score: 3.032065268204644
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The orbital angular momentum (OAM) has attracted widespread attention due to its ability to carry information in multiple dimensions. However, a high-dimensional entanglement carrying OAM can be affected by environment and undergoes decoherence. Ensuring the stability and high fidelity of entangled states after transmission is a crucial part of quantum communication. How to control the entangled states are essential. In this paper, we produce the polarization entangled photon pairs by type I BBO crystals by means of spontaneous parametric down-conversion (SPDC), we achieve the polarization-OAM hybrid entangled states by q-plate (QP) by means of manipulating the multi-degrees of freedom of the quantum state after passing through the APD communication channel. The polarization entangled photon pairs have the characteristics of OAM. We use polarization degree of freedom to modulate OAM degree of freedom, our polarization-OAM hybrid entangled states can slow down the reduction of the fidelity in the during of transmission process. Our quantum states exhibit a superior level of fidelity contrast with the conventional situation. This method will provide a theoretical guidance for improving the transmission fidelity of OAM states in fiber.

Related papers

• Sharing quantum nonlocality and teleportation over long distance using optical hybrid states [0.0]
  We show that the optical hybrid states can efficiently generate a polarization-entangled state that violates Clauser-Horne-Shimony-Holt (CHSH) Bell-inequality well over a metropolitan distance. We further assess the quality of the shared entangled state in the information processing task of quantum teleportation of an unknown polarization qubit.
  arXiv  Detail & Related papers  (2025-02-02T07:46:02Z)
• The Multimode Character of Quantum States Released from a Superconducting Cavity [0.0]
  We study the release of complex quantum states from a superconducting resonator. We quantify the multi-mode character of the output state and discuss how to optimize the fidelity of a quantum state transfer process.
  arXiv  Detail & Related papers  (2023-06-21T09:16:39Z)
• Decoherence-free subspace and entanglement sudden death of multi-photon polarization states in fiber channels [5.259170150405252]
  In a fiber channel, the two most important phenomena that affect polarization entanglement are polarization mode dispersion (PMD) and polarization-dependent loss (PDL) In particular, upon quantifying the entanglement at the output states using concurrence and entanglement witness, we reveal the occurrence of entanglement sudden death (ESD) and the appearance of decoherence-free subspaces (DSF) in tripartite systems.
  arXiv  Detail & Related papers  (2022-12-15T06:14:01Z)
• Orbital angular momentum based intra- and inter- particle entangled states generated via a quantum dot source [0.0]
  This work employs a bright QD single-photon source to generate a complete set of quantum states for information processing with OAM photons. We first study the hybrid intra-particle entanglement between the OAM and the polarization degree of freedom of a single-photon. Then, we investigate the hybrid inter-particle entanglement, by exploiting a probabilistic two qudit OAM-based entangling gate.
  arXiv  Detail & Related papers  (2022-11-09T19:20:49Z)
• Spectral Engineering of Cavity-Protected Polaritons in an Atomic Ensemble with Controlled Disorder [0.0]
  We observe the transition from a disordered regime to a polaritonic one with only two resonances. We realize a dynamically modulated Tavis-Cumming model to produce a comb of narrow polariton resonances protected from the disorder.
  arXiv  Detail & Related papers  (2022-08-25T13:40:32Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• Regression of high dimensional angular momentum states of light [47.187609203210705]
  We present an approach to reconstruct input OAM states from measurements of the spatial intensity distributions they produce. We showcase our approach in a real photonic setup, generating up-to-four-dimensional OAM states through a quantum walk dynamics.
  arXiv  Detail & Related papers  (2022-06-20T16:16:48Z)
• Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
  We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array. Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
  arXiv  Detail & Related papers  (2021-12-10T18:52:07Z)
• Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source [49.06242674127539]
  We experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DoFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
  arXiv  Detail & Related papers  (2021-12-06T21:37:43Z)
• Fibre polarization state compensation in entanglement-based quantum key distribution [62.997667081978825]
  Quantum Key Distribution (QKD) using polarisation encoding can be hard to implement over deployed telecom fibres. We show a technique for dynamically compensating fibre-induced alteration in a QKD system over deployed fibre.
  arXiv  Detail & Related papers  (2021-07-16T00:53:48Z)
• Tunable Anderson Localization of Dark States [146.2730735143614]
  We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system. We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes. The experiment opens the door to the study of various localization phenomena on a new platform.
  arXiv  Detail & Related papers  (2021-05-25T07:52:52Z)
• Steering Interchange of Polariton Branches via Coherent and Incoherent Dynamics [1.9573380763700712]
  We propose the control of single- and two-body Jaynes-Cummings systems in a non-equilibrium scenario. Our findings provide a systematic approach to manipulate polaritons interchange, that we apply to reveal new insights in the transition between Mott Insulator- and Super-like states.
  arXiv  Detail & Related papers  (2020-10-07T16:31:03Z)

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.