title: Optimizing a phase gate using quantum interference.
abstract: A controlled interference is proposed to reduce, by two orders of magnitude, the decoherence of a quantum gate for which the gate fidelity is limited by coupling to states other than the /0> and /1> qubit states. This phenomenon is demonstrated in an ultracold neutral atom implementation of a phase gate using qubits based on motional states in individual wells of an optical lattice.
authors.affiliation: Laboratoire de Photophysique Moléculaire du CNRS, Université Paris XI, 91405 Orsay Cedex, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Charron
authors.forename: Eite
authors.initials: E
authors.lastname: Tiesinga
authors.forename: Frederick
authors.initials: F
authors.lastname: Mies
authors.forename: Carl
authors.initials: C
authors.lastname: Williams