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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1507.03358 (cond-mat)
[Submitted on 13 Jul 2015]

Title:Simple operation sequences to couple and interchange quantum information between spin qubits of different kinds

Authors:Sebastian Mehl, David P. DiVincenzo
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Abstract:Efficient operation sequences to couple and interchange quantum information between quantum dot spin qubits of different kinds are derived using exchange interactions. In the qubit encoding of a single-spin qubit, a singlet-triplet qubit, and an exchange-only (triple-dot) qubit, some of the single-qubit interactions remain on during the entangling operation; this greatly simplifies the operation sequences that construct entangling operations. In the ideal setup, the gate operations use the intra-qubit exchange interactions only once. The limitations of the entangling sequences are discussed, and it is shown how quantum information can be converted between different kinds of quantum dot spin qubits.
Comments: 9 pages, 4 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)
Cite as: arXiv:1507.03358 [cond-mat.mes-hall]
  (or arXiv:1507.03358v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1507.03358
Related DOI: https://doi.org/10.1103/PhysRevB.92.115448

Submission history

From: Sebastian Mehl [view email]
[v1] Mon, 13 Jul 2015 08:47:11 UTC (510 KB)
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