Phys. Rev. Lett. 88, 077901 (2002) [4 pages]Optimizing a Phase Gate Using Quantum InterferenceReceived 16 July 2001; revised 21 November 2001; published 29 January 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.077901
DOI:
10.1103/PhysRevLett.88.077901
PACS:
03.67.Lx, 32.80.Pj, 32.80.Qk
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