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

arXiv:quant-ph/0309009 · Physical Review A

Atom-photon entanglement generation and distribution

Baoqing Sun, Michael Chapman, Li You

Published Apr 21, 2004• 30 citations
arXivHTMLPDF

Abstract

We extend an earlier model by Law and Kimble [J. Mod. Opt.44, 2067 (1997)] for a cavity QED based single-photon-gun to atom-photon entanglement generation and distribution. We illuminate the importance of a small critical atom number on the fidelity of the proposed operation in the strong-coupling limit. Our result points to a promisingly high purity and efficiency using currently available cavity QED parameters, and sheds new light on constructing quantum computing and communication devices with trapped atoms, and high-$Q$ optical cavities.

DOI
10.1103/physreva.69.042316

Related papers

High-purity single-photon generation based on cavity QED

Seigo Kikura, Rui Asaoka, Masato Koashi +1 more

We propose a scheme for generating a high-purity single photon on the basis of cavity QED. This scheme employs an atom as a four-level system and the structure allows the suppression of the reexcitation process due to the atomic decay, which is known to significantly degrade the single-photon purity in state-of-the-art photon sources using a three-level system. Our analysis shows that the reexcitation probability arbitrarily approaches zero without sacrificing the photon generation probability when increasing the power of a driving laser between two excited states. This advantage is achievable by using current cavity-QED technologies. Our scheme can contribute to developing distributed quantum computation or quantum communication with high accuracy.

arXiv:2403.00072•Physical Review Research•Mar 7, 2025•11 citations

Cavity QED with Single Atoms and Photons

Tracy E. Northup

Recent experimental advances in the field of cavity quantum electrodynamics (QED) have opened new possibilities for control of atom‐photon interactions. A laser with “one and the same atom” demonstrates the theory of laser operation pressed to its conceptual limit. The generation of single photons on demand and the realization of cavity QED with well defined atomic numbers N = 0, 1, 2,… both represent important steps toward realizing diverse protocols in quantum information science. Coherent manipulation of the atomic state via Raman transitions provides a new tool in cavity QED for in situ monitoring and control of the atom‐cavity system. All of these achievements share a common point of departure: the regime of strong coupling. It is thus interesting to consider briefly the history of the strong coupling criterion in cavity QED and to trace out the path that research has taken in the pursuit of this goal.

AIP conference proceedings•Jan 1, 2005•3 citations

Single photon generation "on demand" from a single trapped atom strongly coupled to an optical cavity

Jason McKeever, Andreea Boca, A. David. Boozer +2 more

Optically trapped atoms in the strong coupling regime of cavity QED have been used to generate single photons deterministically. Referenced to the total cavity output, the generation efficiency for polarized photons is 16%.

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

Generating entangled photon pairs from a cavity-QED system

Dong Zhou, Baoqing Sun, C. P. Sun +1 more

We propose a scheme for the controlled generation of Einstein-Podosky-Rosen entangled photon pairs from an atom coupled to a high $Q$ optical cavity, extending the prototype system as a source for deterministic single photons. A thorough theoretical analysis confirms the promising operating conditions of our scheme as afforded by currently available experimental setups. Our result demonstrates the cavity QED system as an efficient and effective source for entangled photon pairs, and shines new light on its important role in quantum information science.

arXiv:quant-ph/0509165•Physical Review A•Oct 13, 2005•27 citations

Photon-Photon Entanglement with a Single Trapped Atom

B. Weber, Holger Specht, Tina Müller +4 more

An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomography, resulting in a fidelity exceeding F=90%. The combination of cavity-QED and trapped atom techniques makes our protocol inherently deterministic--an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.

arXiv:0811.3612•Physical Review Letters•Jan 20, 2009•121 citations

Generation of entangled photon pairs in optical cavity-QED: operating in the bad cavity limit

R. García-Maraver, K. Eckert, R. Corbalán +1 more

We propose an optical cavity-QED scheme for the deterministic generation of polarization entangled photon pairs that operates with high fidelity even in the bad cavity limit. The scheme is based on the interaction of an excited four-level atom with two empty optical cavity modes via an adiabatic passage process. Monte-Carlo wave function simulations are used to evaluate the fidelity of the cavity-QED source and its entanglement capability in the presence of decoherence. In the bad cavity limit, fidelities close to one are predicted for state-of-the-art experimental parameter values.

arXiv:0812.4824•Journal of Physics B Atomic Molecular and Optical Physics•Feb 12, 2008•3 citations
We extend an earlier model by Law and Kimble [J. Mod. Opt.44, 2067 (1997)] for a cavity QED based single-photon-gun to atom-photon entanglement generation and distribution. We illuminate the importance of a small critical atom number on the fidelity of the proposed operation in the strong-coupling limit. Our result points to a promisingly high purity and efficiency using currently available cavity QED parameters, and sheds new light on constructing quantum computing and communication devices with trapped atoms, and high-QQQ optical cavities.
We propose a scheme for generating a high-purity single photon on the basis of cavity QED. This scheme employs an atom as a four-level system and the structure allows the suppression of the reexcitation process due to the atomic decay, which is known to significantly degrade the single-photon purity in state-of-the-art photon sources using a three-level system. Our analysis shows that the reexcitation probability arbitrarily approaches zero without sacrificing the photon generation probability when increasing the power of a driving laser between two excited states. This advantage is achievable by using current cavity-QED technologies. Our scheme can contribute to developing distributed quantum computation or quantum communication with high accuracy.
Recent experimental advances in the field of cavity quantum electrodynamics (QED) have opened new possibilities for control of atom‐photon interactions. A laser with “one and the same atom” demonstrates the theory of laser operation pressed to its conceptual limit. The generation of single photons on demand and the realization of cavity QED with well defined atomic numbers N = 0, 1, 2,… both represent important steps toward realizing diverse protocols in quantum information science. Coherent manipulation of the atomic state via Raman transitions provides a new tool in cavity QED for in situ monitoring and control of the atom‐cavity system. All of these achievements share a common point of departure: the regime of strong coupling. It is thus interesting to consider briefly the history of the strong coupling criterion in cavity QED and to trace out the path that research has taken in the pursuit of this goal.
We propose a scheme for the controlled generation of Einstein-Podosky-Rosen entangled photon pairs from an atom coupled to a high QQQ optical cavity, extending the prototype system as a source for deterministic single photons. A thorough theoretical analysis confirms the promising operating conditions of our scheme as afforded by currently available experimental setups. Our result demonstrates the cavity QED system as an efficient and effective source for entangled photon pairs, and shines new light on its important role in quantum information science.
An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomography, resulting in a fidelity exceeding F=90%. The combination of cavity-QED and trapped atom techniques makes our protocol inherently deterministic--an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.
We propose an optical cavity-QED scheme for the deterministic generation of polarization entangled photon pairs that operates with high fidelity even in the bad cavity limit. The scheme is based on the interaction of an excited four-level atom with two empty optical cavity modes via an adiabatic passage process. Monte-Carlo wave function simulations are used to evaluate the fidelity of the cavity-QED source and its entanglement capability in the presence of decoherence. In the bad cavity limit, fidelities close to one are predicted for state-of-the-art experimental parameter values.