Effective boson-spin model for nuclei-ensemble-based universal quantum memory

2004/09/30 by Z. Song, Peng Zhang, P. Zhang +4 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.71.205314

published as Phys. Rev. B 71, 205314 (2005) · 8 pages, 3 figures, new contents added

arxiv created 2005/02/01 · openalex publication_date 2005/05/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 spin information of the electron.

Citations

• Optical Pumping of Quantum-Dot Nuclear Spins
• Superradiance of low-density Frenkel excitons in a crystal slab of three-level atoms: The quantum interference effect
• Storage qubits and their potential implementation through a semiconductor double quantum dot
• Elementary gates for quantum computation
• Dynamics of the dissipative two-state system

Cited by

• Quantum information storage and state transfer based on spin systems