Decoherence-free subspace and entanglement sudden death of multi-photon polarization states in fiber channels

• URL: http://arxiv.org/abs/2212.07627v1
• Date: Thu, 15 Dec 2022 06:14:01 GMT
• Title: Decoherence-free subspace and entanglement sudden death of multi-photon polarization states in fiber channels
• Authors: Yiwen Liu
• Abstract summary: 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.
• Score: 5.259170150405252
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The construction of quantum networks requires long-distance teleportation of multi-qubit entangled states. Here, we investigate the entanglement dynamics of GHZ and W states in fiber channels. In a fiber channel, the two most important phenomena that affect polarization entanglement are polarization mode dispersion (PMD) and polarization-dependent loss (PDL). We theoretically characterize how PMD and PDL vectors affect three-qubit states. 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 (DSFs) in tripartite systems. Finally, we explore the evolution of GHZ and W state with an arbitrary number of photons in a fiber network and evaluate the expectation value of the entanglement witness.

Related papers

• Quantum optical scattering by macroscopic lossy objects: A general approach [55.2480439325792]
  We develop a general approach to describe the scattering of quantum light by a lossy macroscopic object placed in vacuum. We exploit the input-output relation to connect the output state of the field to the input one. We analyze the impact of the classical transmission and absorption dyadics on the transitions from ingoing to outgoing s-polariton.
  arXiv  Detail & Related papers  (2024-11-27T17:44:29Z)
• Deterministic generation of photonic entangled states using decoherence-free subspaces [0.0]
  We propose the use of collective states of matter as a resource for the deterministic generation of quantum states of light. Photon-mediated interactions between the emitters result in the emergence of bright and dark states. We demonstrate that sequential application of these gates leads to the generation of photonic entangled states.
  arXiv  Detail & Related papers  (2024-10-04T11:22:26Z)
• Study of multiple degrees of freedom entanglement in optical fiber [3.032065268204644]
  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.
  arXiv  Detail & Related papers  (2024-04-17T05:11:27Z)
• Tailoring population transfer between two hyperfine ground states of Rb87 [49.1574468325115]
  We investigate the coherent control over a complex multi-level atomic system using the stimulated Raman adiabatic passage (STIRAP) We demonstrate the ability to decompose the system into three- and four-level subsystems independently interacting with light beams.
  arXiv  Detail & Related papers  (2022-10-21T14:57:21Z)
• Disorder-enhanced transport in a chain of lossy dipoles strongly coupled to cavity photons [0.0]
  We study the interplay between disorder and light-matter coupling by considering a disordered one-dimensional chain of lossy dipoles coupled to a multimode optical cavity. Such a system, hosting polaritonic excitations, may be realized experimentally in a wide range of platforms under strong light-matter coupling.
  arXiv  Detail & Related papers  (2022-07-21T16:23:48Z)
• Formation of robust bound states of interacting microwave photons [148.37607455646454]
  One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
  arXiv  Detail & Related papers  (2022-06-10T17:52:29Z)
• 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)
• 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)
• Dark-state and loss-induced phenomena in the quantum-optical regime of $\Lambda$-type three-level systems [0.0]
  We study states with broad photon number distributions which allow processes with high-order Fock states. In our simulations we include several loss mechanisms, namely, dephasing, cavity, and radiative losses. We introduce and analyze a novel quantity, the quantum polarization, and demonstrate its fundamental difference.
  arXiv  Detail & Related papers  (2020-10-06T09:50:31Z)
• Collective radiation from distant emitters [63.391402501241195]
  We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
  arXiv  Detail & Related papers  (2020-06-22T19:03:52Z)

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.