Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

A Single Mode Optical Cavity Containing Four (up to 1000) Independent Spin Waves

Kevin C. Cox, Zachary A. Castillo, David H. Meyer, Paul D. Kunz

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We present an experimental scheme for many-body quantum-electrodynamics by multiplexing of cavity-coupled spin-wave excitations. We experimentally observe the core phenomena and point the way toward creating many-body entanglement in a test-bed quantum network.
DOI
10.1364/cleo_qels.2020.fw4c.1

Related papers

Spin-Wave Multiplexed Atom-Cavity Electrodynamics

Kevin C. Cox, David H. Meyer, Zachary A. Castillo +2 more

We introduce multiplexed atom-cavity quantum electrodynamics with an atomic ensemble coupled to a single optical cavity mode. Multiple Raman dressing beams establish cavity-coupled spin-wave excitations with distinctive spatial profiles. Experimentally, we demonstrate the concept by observing spin-wave vacuum Rabi splittings, selective superradiance, and interference in the cavity-mediated interactions of two spin waves. We highlight that the current experimental configuration allows rapid, interchangeable cavity coupling to 4 profiles with an overlap parameter of less than 10%, enough to demonstrate, for example, a quantum repeater network simulation in the cavity. With further improvements to the optical multiplexing setup, we infer the ability to access more than 10^{3} independent spin-wave profiles.

arXiv:1907.04921•Physical Review Letters•Dec 24, 2019•21 citations

Quantum Many-Body Phenomena in Coupled Cavity Arrays

Hartmann, MJ, Brandão, FGSL, Martin Bodo Plenio

The increasing level of experimental control over atomic and optical systems gained in recent years has paved the way for the exploration of new physical regimes in quantum optics and atomic physics, characterised by the appearance of quantum many-body phenomena, originally encountered only in condensed-matter physics, and the possibility of experimentally accessing them in a more controlled manner. In this review article we survey recent theoretical studies concerning the use of cavity quantum electrodynamics to create quantum many-body systems. Based on recent experimental progress in the fabrication of arrays of interacting micro-cavities and on their coupling to atomic-like structures in several different physical architectures, we review proposals on the realisation of paradigmatic many-body models in such systems, such as the Bose-Hubbard and the anisotropic Heisenberg models. Such arrays of coupled cavities offer interesting properties as simulators of quantum many-body physics, including the full addressability of individual sites and the accessibility of inhomogeneous models. © 2008 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

•Aug 19, 2008•274 citations

Single- and multi-photon states in microwave cavity QED

S. Haroche, Alexia Auffèves, Tristan Meunier +5 more

Cavity QED experiments involving single- and multi-photon microwave fields and displaying atom-radiation entanglement will be described. These experiments reveal in a striking way the quantum nature of the field and its graininess.

Conference on Lasers and Electro-Optics•Jan 1, 2004•0 citations

Simulating cavity QED with spin-orbit coupled Bose-Einstein condensates revisited

Muhammad Sami Hasan, Karol Gietka

Abstract Simulating cavity quantum electrodynamics in synthetic platforms offers a route to studying light--matter physics without real photons. We reassess the frequently invoked analogy between harmonically trapped, spin--orbit-coupled atoms and the quantum Rabi and Dicke models, with particular emphasis on squeezing and entanglement. A single non-interacting atom realizes the quantum Rabi Hamiltonian exactly, up to elementary spin and phase-space rotations. For $N$ non-interacting atoms, however, the center-of-mass mode is only one member of a complete orthonormal set containing $N-1$ relative modes. We prove that, after all modes are included, the spin--spin terms generated by the collective mode cancel exactly against those generated by the relative modes. Equivalently, the original Hamiltonian is a sum of independent one-particle Hamiltonians and therefore cannot create interparticle entanglement from a separable state. Contact interactions invalidate this cancellation but do not remove the relative modes or turn the exact many-body Hamiltonian into a Dicke model. A one-mode Dicke description can arise only as a controlled low-energy approximation after all relevant relative excitations have been shown to be spectrally suppressed. We discuss this distinction together with experimental scales, finite temperature, and possible mode-selection strategies. We also distinguish the single-particle interference underlying density fringes from the interaction-stabilized stripe supersolid observed in many-body condensates.

arXiv:2603.28368•Journal of Physics B Atomic Molecular and Optical Physics•Oct 28, 2026•0 citations

Highly Retrievable Spin-Wave–Photon Entanglement Source

Sheng-Jun Yang, Xu-Jie Wang, Jun Li +3 more

Entanglement between a single photon and a quantum memory forms the building blocks for a quantum repeater and quantum network. Previous entanglement sources are typically with low retrieval efficiency, which limits future larger-scale applications. Here, we report a source of highly retrievable spin-wave-photon entanglement. Polarization entanglement is created through interaction of a single photon with an ensemble of atoms inside a low-finesse ring cavity. The cavity is engineered to be resonant for dual spin-wave modes, which thus enables efficient retrieval of the spin-wave qubit. An intrinsic retrieval efficiency up to 76(4)% has been observed. Such a highly retrievable atom-photon entanglement source will be very useful in future larger-scale quantum repeater and quantum network applications.

arXiv:1505.00405•Physical Review Letters•May 28, 2015•49 citations

Preparation of spin-like-many-cavity-field entangled states via atom-cavity-field-Raman interaction

Changyong Chen

A scheme is presented for preparing cavity-field entangled states through the Raman interaction of Λ-type three-level atom with many coherent state cavity-fields.

Chinese journal of atomic and molecular physics•Jan 1, 2002•0 citations
We introduce multiplexed atom-cavity quantum electrodynamics with an atomic ensemble coupled to a single optical cavity mode. Multiple Raman dressing beams establish cavity-coupled spin-wave excitations with distinctive spatial profiles. Experimentally, we demonstrate the concept by observing spin-wave vacuum Rabi splittings, selective superradiance, and interference in the cavity-mediated interactions of two spin waves. We highlight that the current experimental configuration allows rapid, interchangeable cavity coupling to 4 profiles with an overlap parameter of less than 10%, enough to demonstrate, for example, a quantum repeater network simulation in the cavity. With further improvements to the optical multiplexing setup, we infer the ability to access more than 10^{3} independent spin-wave profiles.
The increasing level of experimental control over atomic and optical systems gained in recent years has paved the way for the exploration of new physical regimes in quantum optics and atomic physics, characterised by the appearance of quantum many-body phenomena, originally encountered only in condensed-matter physics, and the possibility of experimentally accessing them in a more controlled manner. In this review article we survey recent theoretical studies concerning the use of cavity quantum electrodynamics to create quantum many-body systems. Based on recent experimental progress in the fabrication of arrays of interacting micro-cavities and on their coupling to atomic-like structures in several different physical architectures, we review proposals on the realisation of paradigmatic many-body models in such systems, such as the Bose-Hubbard and the anisotropic Heisenberg models. Such arrays of coupled cavities offer interesting properties as simulators of quantum many-body physics, including the full addressability of individual sites and the accessibility of inhomogeneous models. © 2008 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Abstract Simulating cavity quantum electrodynamics in synthetic platforms offers a route to studying light--matter physics without real photons. We reassess the frequently invoked analogy between harmonically trapped, spin--orbit-coupled atoms and the quantum Rabi and Dicke models, with particular emphasis on squeezing and entanglement. A single non-interacting atom realizes the quantum Rabi Hamiltonian exactly, up to elementary spin and phase-space rotations. For NNN non-interacting atoms, however, the center-of-mass mode is only one member of a complete orthonormal set containing N−1N-1N−1 relative modes. We prove that, after all modes are included, the spin--spin terms generated by the collective mode cancel exactly against those generated by the relative modes. Equivalently, the original Hamiltonian is a sum of independent one-particle Hamiltonians and therefore cannot create interparticle entanglement from a separable state. Contact interactions invalidate this cancellation but do not remove the relative modes or turn the exact many-body Hamiltonian into a Dicke model. A one-mode Dicke description can arise only as a controlled low-energy approximation after all relevant relative excitations have been shown to be spectrally suppressed. We discuss this distinction together with experimental scales, finite temperature, and possible mode-selection strategies. We also distinguish the single-particle interference underlying density fringes from the interaction-stabilized stripe supersolid observed in many-body condensates.
Entanglement between a single photon and a quantum memory forms the building blocks for a quantum repeater and quantum network. Previous entanglement sources are typically with low retrieval efficiency, which limits future larger-scale applications. Here, we report a source of highly retrievable spin-wave-photon entanglement. Polarization entanglement is created through interaction of a single photon with an ensemble of atoms inside a low-finesse ring cavity. The cavity is engineered to be resonant for dual spin-wave modes, which thus enables efficient retrieval of the spin-wave qubit. An intrinsic retrieval efficiency up to 76(4)% has been observed. Such a highly retrievable atom-photon entanglement source will be very useful in future larger-scale quantum repeater and quantum network applications.