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Single-shot realization of nonadiabatic holonomic quantum gates in decoherence-free subspaces
Department of Physics, Shandong University, Jinan 250100, China.
Department of Physics, Shandong University, Jinan 250100, China.
Department of Physics, Shandong University, Jinan 250100, China.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Uppsala universitet. (Quantum information theory)
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2017 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622Article in journal (Refereed) Published
Abstract [en]

Nonadiabatic holonomic quantum computation in decoherence-free subspaces has attracted increasing attention recently, as it allows for high-speed implementation and combines both the robustness of holonomic gates and the coherence stabilization of decoherence-free subspaces. Since the first protocol of nonadiabatic holonomic quantum computation in decoherence-free subspaces, a number of schemes for its physical imple- mentation have been put forward. However, all previous schemes require two noncommuting gates to realize an arbitrary one-qubit gate, which doubles the exposure time of gates to error sources as well as the resource expenditure. In this paper, we propose an alternative protocol for nonadiabatic holonomic quantum computation in decoherence-free subspaces, in which an arbitrary one-qubit gate in decoherence-free subspaces is realized by a single-shot implementation. The present protocol not only maintains the merits of the original protocol, but it also reduces the exposure time to other error sources as well as it avoids the extra resource spending associated with the need of combining two gates to implement an arbitrary one-qubit gate. 

Place, publisher, year, edition, pages
2017.
Keyword [en]
Quantum computation, geometric phase, decoherence free subspaces
National Category
Atom and Molecular Physics and Optics Other Physics Topics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-322383DOI: 10.1103/PhysRevA.95.062310OAI: oai:DiVA.org:uu-322383DiVA: diva2:1097001
Funder
Swedish Research Council, D0413201Carl Tryggers foundation , 14:441
Available from: 2017-05-21 Created: 2017-05-21 Last updated: 2017-06-06

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CiteExportLink to record
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