Tuesday, August 6, 2013

1308.0831 (Miroslav Gavenda et al.)

Quantum noise eater for a single photonic qubit    [PDF]

Miroslav Gavenda, Lucie Čelechovská, Miloslav Dušek, Radim Filip
We propose a quantum noise eater for a single qubit and experimentally verify its performance for recovery of a superposition carried by a dual-rail photonic qubit. We consider a case when only one of the rails (e.g., one of interferometric arms) is vulnerable to noise. A coherent but randomly arriving photon penetrating into this single rail causes a change of its state, which results in an error in a subsequent quantum information processing. We theoretically prove and experimentally demonstrate a conditional full recovery of the superposition by this quantum noise eater.
View original: http://arxiv.org/abs/1308.0831

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