Cavity-based quantum networks with single atoms and optical photons
Top Cited Papers
Open Access
- 1 December 2015
- journal article
- research article
- Published by American Physical Society (APS) in Reviews of Modern Physics
- Vol. 87 (4), 1379-1418
- https://doi.org/10.1103/revmodphys.87.1379
Abstract
Distributed quantum networks will allow users to perform tasks and to interact in ways which are not possible with present-day technology. Their implementation is a key challenge for quantum science and requires the development of stationary quantum nodes that can send and receive as well as store and process quantum information locally. The nodes are connected by quantum channels for flying information carriers, i.e., photons. These channels serve both to directly exchange quantum information between nodes and to distribute entanglement over the whole network. In order to scale such networks to many particles and long distances, an efficient interface between the nodes and the channels is required. This article describes the cavity-based approach to this goal, with an emphasis on experimental systems in which single atoms are trapped in and coupled to optical resonators. Besides being conceptually appealing, this approach is promising for quantum networks on larger scales, as it gives access to long qubit coherence times and high light-matter coupling efficiencies. Thus, it allows one to generate entangled photons on the push of a button, to reversibly map the quantum state of a photon onto an atom, to transfer and teleport quantum states between remote atoms, to entangle distant atoms, to detect optical photons nondestructively, to perform entangling quantum gates between an atom and one or several photons, and even provides a route toward efficient heralded quantum memories for future repeaters. The presented general protocols and the identification of key parameters are applicable to other experimental systems.Keywords
Funding Information
- Bundesministerium für Bildung und Forschung (IKT 2020 (QK_QuOReP), Q.com-Q)
- European Union (SIQS)
This publication has 220 references indexed in Scilit:
- Heralded Entanglement of Two Ions in an Optical CavityPhysical Review Letters, 2013
- Ultrafast optical control of individual quantum dot spin qubitsReports on Progress in Physics, 2013
- All-Optical Switch and Transistor Gated by One Stored PhotonScience, 2013
- Generation of single photons from an atom-cavity systemPhysical Review A, 2013
- Quantum-state transfer from an ion to a photonNature Photonics, 2013
- Heralded Entanglement Between Widely Separated AtomsScience, 2012
- Cavity Cooling Below the Recoil LimitScience, 2012
- Quantum simulations with ultracold quantum gasesNature Physics, 2012
- On-chip quantum simulation with superconducting circuitsNature Physics, 2012
- Giant optical Faraday rotation induced by a single-electron spin in a quantum dot: Applications to entangling remote spins via a single photonPhysical Review B, 2008