Decoherence may significantly affect the polarization state of optical pulses propagating in dispersive media because of the unavoidable presence of more than a single frequency in the envelope of the pulse. Here we report on the suppression of polarization decoherence in a ring cavity obtained by properly retooling for photonic qubits the “bang-bang” protection technique already employed for nuclear spins and nuclear-quadrupole qubits. Our results show that bang-bang control can be profitably extended to quantum information processes involving flying polarization qubits.

Experimental Inhibition of Decoherence on Flying Qubits via “Bang-Bang” Control

DAMODARAKURUP, SAJEEV;LUCAMARINI, MARCO;DI GIUSEPPE, Giovanni;VITALI, David;TOMBESI, Paolo
2009-01-01

Abstract

Decoherence may significantly affect the polarization state of optical pulses propagating in dispersive media because of the unavoidable presence of more than a single frequency in the envelope of the pulse. Here we report on the suppression of polarization decoherence in a ring cavity obtained by properly retooling for photonic qubits the “bang-bang” protection technique already employed for nuclear spins and nuclear-quadrupole qubits. Our results show that bang-bang control can be profitably extended to quantum information processes involving flying polarization qubits.
2009
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/115083
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