TY - JOUR
T1 - Quantum phase-gate operation based on nonlinear optics
T2 - Full quantum analysis
AU - Ottaviani, C.
AU - Rebić, S.
AU - Vitali, D.
AU - Tombesi, P.
PY - 2006
Y1 - 2006
N2 - We present a full quantum treatment of a five-level atomic system coupled to two quantum and two classical light fields. The two quantum fields undergo a cross-phase-modulation induced by electromagnetically induced transparency. The performance of this configuration as a two-qubit quantum phase gate for traveling single photons is examined. A trade-off between the size of the conditional phase shift and the fidelity of the gate is found. Nonetheless, a satisfactory gate performance is still found to be possible in the transient regime, corresponding to a fast gate operation.
AB - We present a full quantum treatment of a five-level atomic system coupled to two quantum and two classical light fields. The two quantum fields undergo a cross-phase-modulation induced by electromagnetically induced transparency. The performance of this configuration as a two-qubit quantum phase gate for traveling single photons is examined. A trade-off between the size of the conditional phase shift and the fidelity of the gate is found. Nonetheless, a satisfactory gate performance is still found to be possible in the transient regime, corresponding to a fast gate operation.
UR - http://www.scopus.com/inward/record.url?scp=33144488584&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.73.010301
DO - 10.1103/PhysRevA.73.010301
M3 - Article
AN - SCOPUS:33144488584
SN - 1050-2947
VL - 73
SP - 010301-1-010301-4
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 1
M1 - 010301
ER -