title: Photon-photon gates in Bose-Einstein condensates.
abstract: It has recently been shown that light can be stored in Bose-Einstein condensates for over a second. Here we propose a method for realizing a controlled phase gate between two stored photons. The photons are both stored in the ground state of the effective trapping potential inside the condensate. The collision-induced interaction is enhanced by adiabatically increasing the trapping frequency and by using a Feshbach resonance. A controlled phase shift of π can be achieved in 1 s or less.
authors.affiliation: Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary T2N 1N4, Alberta, Canada.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Rispe
authors.forename: Bing
authors.initials: B
authors.lastname: He
authors.forename: Christoph
authors.initials: C
authors.lastname: Simon