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arXiv quant-ph/0409120quant-phcond-mat.mes-hall
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基于自旋波的电子自旋环形阵列量子存储

Spin wave based quantum storage of electronic spin with a ring array of nuclear spins

Y. D. Wang, Y. Li, Z. Song, C. P. Sun

摘要:

提出了一种基于固态的电子自旋量子比特通用存储协议。该方案中的量子存储器是量子点中原子核环形阵列中的自旋波激发。我们证明了电子自旋的任意态所携带的量子信息可以相干地映射到自旋波激发或磁振子态上。通过适当的外部控制,可以可逆地读出存储在量子存储器中的量子态。我们还详细讨论了由于电子自旋与核自旋之间的非均匀耦合而引起的量子退相干机制。

英文摘要:

We propose a solid state based protocol to implement the universal quantum storage for electronic spin qubit. The quantum memory in this scheme is the spin wave excitation in the ring array of nuclei in a quantum dot. We show that the quantum information carried by an arbitrary state of the electronic spin can be coherently mapped onto the spin wave excitations or the magnon states. With an appropriate external control, the stored quantum state in quantum memory can be read out reversibly. We also explore in detail the quantum decoherence mechanism due to the inhomogeneous couplings between the electronic spin and the nuclear spins.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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