Second-order magnetic field gradient-induced strong coupling between nitrogen-vacancy centers and a mechanical oscillator

We consider a cantilever mechanical oscillator （MO） made of diamond. A nitrogen-vacancy （NV） center lies at the end of the cantilever. Two magnetic tips near the NV center induce a strong second-order magnetic field gradient. Under coherent driving of the MO, we find that the coupling between the MO...

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Bibliographic Details
Published inScience China. Physics, mechanics & astronomy Vol. 60; no. 7; pp. 17 - 24
Main Authors Cai, Kang, Wang, RuiXia, Yin, ZhangQi, Long, GuiLu
Format Journal Article
LanguageEnglish
Published Beijing Science China Press 01.07.2017
Springer Nature B.V
Subjects
Astronomy
Classical and Continuum Physics
Compressing
Coupling
Diamonds
Electrons
Information processing
Magnetic fields
Mechanical oscillators
Nitrogen
Observations and Techniques
Physics
Physics and Astronomy
mechanical oscillator
second-order magnetic field gradient
squeezing
state transfer
NV center
entanglement
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Summary:We consider a cantilever mechanical oscillator （MO） made of diamond. A nitrogen-vacancy （NV） center lies at the end of the cantilever. Two magnetic tips near the NV center induce a strong second-order magnetic field gradient. Under coherent driving of the MO, we find that the coupling between the MO and the NV center is greatly enhanced. We studied how to generate entanglement between the MO and the NV center and realize quantum state transfer between them. We also propose a scheme to generate two-mode squeezing between different MO modes by coupling them to the same NV center. The decoherence and dissipation effects for both the MO and the NV center are numerically calculated using the present parameter values of the experimental configuration. We have achieved high fidelity for entanglement generation, quantum state transfer, and large two- mode squeezing.
Bibliography:second-order magnetic field gradient, NV center, mechanical oscillator, entanglement, state transfer, squeezing
We consider a cantilever mechanical oscillator （MO） made of diamond. A nitrogen-vacancy （NV） center lies at the end of the cantilever. Two magnetic tips near the NV center induce a strong second-order magnetic field gradient. Under coherent driving of the MO, we find that the coupling between the MO and the NV center is greatly enhanced. We studied how to generate entanglement between the MO and the NV center and realize quantum state transfer between them. We also propose a scheme to generate two-mode squeezing between different MO modes by coupling them to the same NV center. The decoherence and dissipation effects for both the MO and the NV center are numerically calculated using the present parameter values of the experimental configuration. We have achieved high fidelity for entanglement generation, quantum state transfer, and large two- mode squeezing.
11-5849/N
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-017-9039-0