Tuesday, May 21, 2013

1305.4252 (Alexia Auffèves et al.)

Single shot quantum non-demolition readout with a hybrid opto-mechanical
transducer
   [PDF]

Alexia Auffèves, Maxime Richard
A quantum emitter coupled to a nanomechanical oscillator is a hybrid system where a macroscopic degree of freedom can be manipulated quantum mechanically. Recent progress in nanotechnology has allowed to realize such devices by embedding single artificial atoms into vibrating wires or membranes, opening up new perspectives for quantum information technologies and for the exploration of the quantum-classical boundary. In this letter, we show that optical modulation of the quantum emitter state results in the build up of a large phonon field, potentially exceeding the Brownian motion even at room temperature. This efficient scheme can be exploited to perform single shot quantum non demolition readout of a quantum bit, both in superconducting and semiconductor systems.
View original: http://arxiv.org/abs/1305.4252

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