Experimental inhibition of decoherence on flying qubits via bang-bang control

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.

5 pages, 3 figures

References in corpus (3)

• Bang-bang control of fullerene qubits using ultra-fast phase gates
• Experimental Demonstration of Decoherence-Free One-Way Information Transfer
• Reducing Polarization Mode Dispersion With Controlled Polarization Rotations

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