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Spin-electric Berry phase shift in triangular molecular magnets
Dept. of Mathematics, Faculty of Science, Univ. of Isfahan, Iran.
School of Computer Science, Physics and Mathematics, Linnaeus Univ., Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Uppsala universitet. (Quantum information theory)
2016 (English)Article in journal (Other academic) Submitted
Abstract [en]

We propose a Berry phase effect on the chiral degrees of freedom of a triangular single-molecule magnet (SMM). The phase is induced by adiabatically varying an external electric field in the plane of the molecule via a spin-electric coupling mechanism present in these frustrated SMMs. The Berry phase effect depends on the spin-orbit interaction splitting and on the electric dipole moment. By varying the amplitude of the applied electric field, the Berry phase difference between the two spin states can take any arbitrary value between 0 and π, which can be measured as a phase shift between the two chiral states by using spin-echo techniques. Our result can be used to realize an electric field induced geometric phase-shift gate acting on a chiral qubit encoded in the ground state manifold of the SMM.

Place, publisher, year, edition, pages
Keyword [en]
Molecular magnets, Berry phase
National Category
Condensed Matter Physics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
URN: urn:nbn:se:uu:diva-302656OAI: oai:DiVA.org:uu-302656DiVA: diva2:963053
Swedish Research Council, 621-2014-4785Swedish Research Council, D0413201
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2016-09-08

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Sjöqvist, Erik
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