Experimental inhibition of decoherence on flying qubits via "bang-bang" control.
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.
Damodarakurup
S
S
Dipartimento di Fisica, Università di Camerino, I-62032 Camerino (MC), Italy.
Lucamarini
M
M
Di Giuseppe
G
G
Vitali
D
D
Tombesi
P
P