Signatures of superradiance as a witness to multipartite entanglement

• URL: http://arxiv.org/abs/2303.12515v2
• Date: Thu, 15 Jun 2023 10:43:17 GMT
• Title: Signatures of superradiance as a witness to multipartite entanglement
• Authors: Frederik Lohof, Daniel Schumayer, David A. W. Hutchinson, Christopher Gies
• Abstract summary: We discuss whether or not signatures of superradiance from semiconductor nanolasers, manifesting themselves as a modification of the spontaneous-emission time, can be interpreted as a witness to detect entanglement in the underlying state of the emitters.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Generation and detection of entanglement is at the forefront of most quantum information technologies. There is a plethora of techniques that reveal entanglement on the basis of only partial information about the underlying quantum state, including entanglement witnesses. Superradiance refers to the phenomenon of highly synchronized photon emission from an ensemble of quantum emitters that is caused by correlations among the individual particles and has been connected by Dicke himself to the presence of multipartite entangled states. We investigate this connection in a quantitative way and discuss, whether or not signatures of superradiance from semiconductor nanolasers, manifesting themselves as a modification of the spontaneous-emission time, can be interpreted as a witness to detect entanglement in the underlying state of the emitters.

Related papers

• Superactivation and Incompressibility of Genuine Multipartite Entanglement [0.832184180529969]
  Two copies of a quantum state may exhibit forms of correlations which are absent on the single-copy level.<n>We develop a systematic approach towards a full understanding of this phenomenon using the paradigm of genuine multipartite entanglement.<n>We prove the existence of incompressible entanglement, meaning that there are quantum states for which superactivated multipartite entanglement cannot be reduced to the single-copy level.
  arXiv  Detail & Related papers  (2024-12-24T10:35:04Z)
• Detecting entanglement from macroscopic measurements of the electric field and its fluctuations [0.0]
  We introduce a family of entanglement witnesses for open quantum systems. Their efficiency is demonstrated by detecting, from almost any direction, the entanglement of single-photon states. These electric-field-based witnesses can be used on any set of emitters described by the Pauli group.
  arXiv  Detail & Related papers  (2024-04-24T16:47:42Z)
• Successive quasienergy collapse and breakdown of photon blockade in the few-emitter limit [0.0]
  emergent behavior that arises in many-body systems of increasing size follows universal laws. Recent progress allows for the exploration of the few-emitter limit. We explore this limit in the driven and damped Tavis--Cummings model.
  arXiv  Detail & Related papers  (2024-03-04T19:11:39Z)
• Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
  Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them. Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
  arXiv  Detail & Related papers  (2023-12-04T15:35:41Z)
• The strongly driven Fermi polaron [49.81410781350196]
  Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems. We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons. We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
  arXiv  Detail & Related papers  (2023-08-10T17:59:51Z)
• Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware [62.997667081978825]
  We observe partial and infinite-temperature thermalization on a quantum superconducting processor. We show that the convergence does not tend to a completely mixed (infinite-temperature) state, but to a block-diagonal state in the observable basis.
  arXiv  Detail & Related papers  (2022-11-14T15:18:11Z)
• Observation of a superradiant phase transition with emergent cat states [18.801683138820948]
  Superradiant phase transitions (SPTs) are important for understanding light-matter interactions at the quantum level. We report an experimental demonstration of the SPT featuring the emergence of a highly nonclassical photonic field.
  arXiv  Detail & Related papers  (2022-07-12T13:12:23Z)
• 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)
• Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles [68.8204255655161]
  We consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser.
  arXiv  Detail & Related papers  (2022-05-10T06:54:54Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• Quantum particle across Grushin singularity [77.34726150561087]
  We study the phenomenon of transmission across the singularity that separates the two half-cylinders. All the local realisations of the free (Laplace-Beltrami) quantum Hamiltonian are examined as non-equivalent protocols of transmission/reflection. This allows to comprehend the distinguished status of the so-called bridging' transmission protocol previously identified in the literature.
  arXiv  Detail & Related papers  (2020-11-27T12:53:23Z)
• Super- and subradiance by entangled free particles [0.0]
  We show how a pair of path-entangled electrons can demonstrate either super- or subradiant light emission. By choosing different free-electron Bell-states, the spectrum and emission pattern of the light can be reshaped. Our findings suggest that light emission can be sensitive to the explicit quantum state of the emitting matter wave.
  arXiv  Detail & Related papers  (2020-11-04T21:26:44Z)
• Quantum coherence and speed limit in the mean-field Dicke model of superradiance [0.0]
  We discuss the quantifying of quantum coherence for the Dicke model of superradiance in the mean-field approximation. We find the single-atom $l_1$-norm of coherence is given by the square root of the normalized average intensity of radiation emitted by the superradiant system.
  arXiv  Detail & Related papers  (2020-07-06T16:35:53Z)

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.