Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator

Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator

We solve the Schrödinger equation for various quantum regimes describing a tunneling macrospin coupled to a torsional oscillator. The energy spectrum and freezing of spin tunneling are studied. Magnetic susceptibility, noise spectrum, and decoherence due to entanglement of spin and mechanical modes...

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Main Authors: D. A. Garanin, E. M. Chudnovsky
Format: Article
Language:English
Published: American Physical Society 2011-08-01
Series:Physical Review X
Online Access:http://doi.org/10.1103/PhysRevX.1.011005
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spelling doaj-2a01a4f7d4d84f7aaa544ee6a4c148532020-11-24T23:44:08ZengAmerican Physical SocietyPhysical Review X2160-33082011-08-011101100510.1103/PhysRevX.1.011005Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional ResonatorD. A. GaraninE. M. ChudnovskyWe solve the Schrödinger equation for various quantum regimes describing a tunneling macrospin coupled to a torsional oscillator. The energy spectrum and freezing of spin tunneling are studied. Magnetic susceptibility, noise spectrum, and decoherence due to entanglement of spin and mechanical modes are computed. We show that the presence of a tunneling spin can be detected via splitting of the mechanical mode at the resonance. Our results apply to experiments with magnetic molecules coupled to nanoresonators.http://doi.org/10.1103/PhysRevX.1.011005
collection DOAJ
language English
format Article
sources DOAJ
author D. A. Garanin
E. M. Chudnovsky
spellingShingle D. A. Garanin
E. M. Chudnovsky
Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
Physical Review X
author_facet D. A. Garanin
E. M. Chudnovsky
author_sort D. A. Garanin
title Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
title_short Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
title_full Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
title_fullStr Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
title_full_unstemmed Quantum Entanglement of a Tunneling Spin with Mechanical Modes of a Torsional Resonator
title_sort quantum entanglement of a tunneling spin with mechanical modes of a torsional resonator
publisher American Physical Society
series Physical Review X
issn 2160-3308
publishDate 2011-08-01
description We solve the Schrödinger equation for various quantum regimes describing a tunneling macrospin coupled to a torsional oscillator. The energy spectrum and freezing of spin tunneling are studied. Magnetic susceptibility, noise spectrum, and decoherence due to entanglement of spin and mechanical modes are computed. We show that the presence of a tunneling spin can be detected via splitting of the mechanical mode at the resonance. Our results apply to experiments with magnetic molecules coupled to nanoresonators.
url http://doi.org/10.1103/PhysRevX.1.011005
work_keys_str_mv AT dagaranin quantumentanglementofatunnelingspinwithmechanicalmodesofatorsionalresonator
AT emchudnovsky quantumentanglementofatunnelingspinwithmechanicalmodesofatorsionalresonator
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