Physics – Quantum Physics
Scientific paper
2004-09-27
Phys. Rev. B 71, 205314 (2005)
Physics
Quantum Physics
8 pages, 3 figures, new contents added
Scientific paper
10.1103/PhysRevB.71.205314
We study the collective excitation of a macroscopic ensemble of polarized nuclei fixed in a quantum dot. Under the approximately homogeneous condition that we explicitly present in this paper, this many-particle system behaves as a single mode boson interacting with the spin of a single conduction band electron confined in this quantum dot. Within this effective spin-boson system, the quantum information carried by the electronic spin can be coherently transferred into the collective bosonic mode of excitation in the ensemble of nuclei. In this sense, the collective bosonic excitation can serve as a stable quantum memory to store the quantum information of spin state of electron.
Shi Tao
Song Zhankai
Sun Chang-Pu
Zhang Pei-Pei
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