Long-lived memory for mesoscopic quantum bits

Details Long-lived memory for mesoscopic quantum bits Long-lived memory for mesoscopic quantum bits

2003-01-17

arxiv.org/abs/cond-mat/0301323v1

Phys. Rev. Lett. 90, 206803 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.90.206803

We describe a technique to create long-lived quantum memory for quantum bits in mesoscopic systems. Specifically we show that electronic spin coherence can be reversibly mapped onto the collective state of the surrounding nuclei. The coherent transfer can be efficient and fast and it can be used, when combined with standard resonance techniques, to reversibly store coherent superpositions on the time scale of seconds. This method can also allow for ``engineering'' entangled states of nuclear ensembles and efficiently manipulating the stored states. We investigate the feasibility of this method through a detailed analysis of the coherence properties of the system.

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