title: Quantum Logic with Cavity Photons From Single Atoms.
abstract: We demonstrate quantum logic using narrow linewidth photons that are produced with an a priori nonprobabilistic scheme from a single ^{87}Rb atom strongly coupled to a high-finesse cavity. We use a controlled-not gate integrated into a photonic chip to entangle these photons, and we observe nonclassical correlations between photon detection events separated by periods exceeding the travel time across the chip by 3 orders of magnitude. This enables quantum technology that will use the properties of both narrow-band single photon sources and integrated quantum photonics.
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Annemarie
authors.initials: A
authors.lastname: Holleczek
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Oliver
authors.initials: O
authors.lastname: Barter
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: Allison
authors.initials: A
authors.lastname: Rubenok
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Jerome
authors.initials: J
authors.lastname: Dilley
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Peter B R
authors.initials: PB
authors.lastname: Nisbet-Jones
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Gunnar
authors.initials: G
authors.lastname: Langfahl-Klabes
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: Graham D
authors.initials: GD
authors.lastname: Marshall
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.|Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom.
authors.forename: Chris
authors.initials: C
authors.lastname: Sparrow
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: Jeremy L
authors.initials: JL
authors.lastname: O'Brien
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Poulios
authors.affiliation: University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Axel
authors.initials: A
authors.lastname: Kuhn
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: Jonathan C F
authors.initials: JC
authors.lastname: Matthews