TY - JOUR
T1 - Interaction-free quantum optical fredkin gates in χ (2) Microdisks
AU - Huang, Yu Ping
AU - Kumar, Prem
PY - 2012
Y1 - 2012
N2 - We present novel interaction-free realizations of quantum optical Fredkin gates that do not rely on direct physical coupling between the target light (signal) and the control light (pump). The interaction-free feature of such gates allow to overcome the fundamental limits of photon loss and quantum-state decoherence imposed by the signal-pump coupling. This advantage, together with the low inherent quantum-noise level in χ (2) microdisks, gives rise to substantially improved performance over the existing Fredkin-gate designs. Explicitly using lithium-niobate mircrodisks, we present two kinds of interaction-free Fredkin gates, a phase gate and an optical-path gate, both of which are designed with telecom-band applications in mind. For both gates, the threshold pump peak power to achieve a gate contrast >100 and a signal loss <10% is hundreds of microwatts for practical parameters of the devices.
AB - We present novel interaction-free realizations of quantum optical Fredkin gates that do not rely on direct physical coupling between the target light (signal) and the control light (pump). The interaction-free feature of such gates allow to overcome the fundamental limits of photon loss and quantum-state decoherence imposed by the signal-pump coupling. This advantage, together with the low inherent quantum-noise level in χ (2) microdisks, gives rise to substantially improved performance over the existing Fredkin-gate designs. Explicitly using lithium-niobate mircrodisks, we present two kinds of interaction-free Fredkin gates, a phase gate and an optical-path gate, both of which are designed with telecom-band applications in mind. For both gates, the threshold pump peak power to achieve a gate contrast >100 and a signal loss <10% is hundreds of microwatts for practical parameters of the devices.
KW - Fredkin gate
KW - lithium niobate
KW - microdisk
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U2 - 10.1109/JSTQE.2011.2116111
DO - 10.1109/JSTQE.2011.2116111
M3 - Article
AN - SCOPUS:84856167940
SN - 1077-260X
VL - 18
SP - 600
EP - 611
JO - IEEE Journal of Selected Topics in Quantum Electronics
JF - IEEE Journal of Selected Topics in Quantum Electronics
IS - 2
M1 - 5740561
ER -