Quantum entanglement of a tunneling spin with mechanical modes of a torsional resonator

Details 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

2011-04-06

arxiv.org/abs/1104.1170v1

Physical Review X 1, 011005 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevX.1.011005

We solve Schr\"odinger equation describing a tunneling macrospin coupled to a torsional oscillator. Energy spectrum is studied for various quantum regimes. Magnetic susceptibility and noise spectrum are computed. We show that entanglement of the spin with mechanical modes of a subnanometer oscillator results in the decoherence of spin tunneling. For larger oscillators the presence of a tunneling spin can be detected through splitting of the mechanical mode at the resonance. Our results apply to experiments with magnetic molecules coupled to nanoresonators.

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