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Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator.

Ovartchaiyapong P, Lee KW, Myers BA, Jayich AC - Nat Commun (2014)

Bottom Line: However, the nitrogen-vacancy spin-strain interaction has not been well characterized.Here, we demonstrate dynamic, strain-mediated coupling of the mechanical motion of a diamond cantilever to the spin of an embedded nitrogen-vacancy centre.Finally, we show how this spin-resonator system could enable coherent spin-phonon interactions in the quantum regime.

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Physics, University of California Santa Barbara, Broida Hall, Santa Barbara, California 93106, USA [2].

ABSTRACT
The development of hybrid quantum systems is central to the advancement of emerging quantum technologies, including quantum information science and quantum-assisted sensing. The recent demonstration of high-quality single-crystal diamond resonators has led to significant interest in a hybrid system consisting of nitrogen-vacancy centre spins that interact with the resonant phonon modes of a macroscopic mechanical resonator through crystal strain. However, the nitrogen-vacancy spin-strain interaction has not been well characterized. Here, we demonstrate dynamic, strain-mediated coupling of the mechanical motion of a diamond cantilever to the spin of an embedded nitrogen-vacancy centre. Via quantum control of the spin, we quantitatively characterize the axial and transverse strain sensitivities of the nitrogen-vacancy ground-state spin. The nitrogen-vacancy centre is an atomic scale sensor and we demonstrate spin-based strain imaging with a strain sensitivity of 3 × 10(-6) strain Hz(-1/2). Finally, we show how this spin-resonator system could enable coherent spin-phonon interactions in the quantum regime.

No MeSH data available.


Related in: MedlinePlus

A hybrid NV-cantilever system.(a) Strain modulates the spin levels of an NV centre embedded in a cantilever. The strain profile was simulated using a finite element method. (b) Schematic of experiment: a green laser is focused onto a single NV spin embedded in a cantilever via a confocal microscope for initialization and readout. Microwaves are used for pulsed spin manipulation. (c) Confocal image of a cantilever showing the presence of single embedded NV centres.
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f1: A hybrid NV-cantilever system.(a) Strain modulates the spin levels of an NV centre embedded in a cantilever. The strain profile was simulated using a finite element method. (b) Schematic of experiment: a green laser is focused onto a single NV spin embedded in a cantilever via a confocal microscope for initialization and readout. Microwaves are used for pulsed spin manipulation. (c) Confocal image of a cantilever showing the presence of single embedded NV centres.

Mentions: In this experiment, an NV interacts with the fundamental mechanical mode of the cantilever via strain (Fig. 1a). For small displacements of the cantilever, the strain felt by the NV centre is linear in cantilever position, and the total strain can be written as , where Xd is the amplitude of driven motion, x0 is the amplitude of zero point motion and is the strain induced by the zero point motion12. If the NV is in the presence of a static magnetic field aligned closely to its symmetry axis, equation (1) can be approximately diagonalized with eigenstates , and the energies can be expressed as a function of the normalized beam displacement,


Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator.

Ovartchaiyapong P, Lee KW, Myers BA, Jayich AC - Nat Commun (2014)

A hybrid NV-cantilever system.(a) Strain modulates the spin levels of an NV centre embedded in a cantilever. The strain profile was simulated using a finite element method. (b) Schematic of experiment: a green laser is focused onto a single NV spin embedded in a cantilever via a confocal microscope for initialization and readout. Microwaves are used for pulsed spin manipulation. (c) Confocal image of a cantilever showing the presence of single embedded NV centres.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109012&req=5

f1: A hybrid NV-cantilever system.(a) Strain modulates the spin levels of an NV centre embedded in a cantilever. The strain profile was simulated using a finite element method. (b) Schematic of experiment: a green laser is focused onto a single NV spin embedded in a cantilever via a confocal microscope for initialization and readout. Microwaves are used for pulsed spin manipulation. (c) Confocal image of a cantilever showing the presence of single embedded NV centres.
Mentions: In this experiment, an NV interacts with the fundamental mechanical mode of the cantilever via strain (Fig. 1a). For small displacements of the cantilever, the strain felt by the NV centre is linear in cantilever position, and the total strain can be written as , where Xd is the amplitude of driven motion, x0 is the amplitude of zero point motion and is the strain induced by the zero point motion12. If the NV is in the presence of a static magnetic field aligned closely to its symmetry axis, equation (1) can be approximately diagonalized with eigenstates , and the energies can be expressed as a function of the normalized beam displacement,

Bottom Line: However, the nitrogen-vacancy spin-strain interaction has not been well characterized.Here, we demonstrate dynamic, strain-mediated coupling of the mechanical motion of a diamond cantilever to the spin of an embedded nitrogen-vacancy centre.Finally, we show how this spin-resonator system could enable coherent spin-phonon interactions in the quantum regime.

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Physics, University of California Santa Barbara, Broida Hall, Santa Barbara, California 93106, USA [2].

ABSTRACT
The development of hybrid quantum systems is central to the advancement of emerging quantum technologies, including quantum information science and quantum-assisted sensing. The recent demonstration of high-quality single-crystal diamond resonators has led to significant interest in a hybrid system consisting of nitrogen-vacancy centre spins that interact with the resonant phonon modes of a macroscopic mechanical resonator through crystal strain. However, the nitrogen-vacancy spin-strain interaction has not been well characterized. Here, we demonstrate dynamic, strain-mediated coupling of the mechanical motion of a diamond cantilever to the spin of an embedded nitrogen-vacancy centre. Via quantum control of the spin, we quantitatively characterize the axial and transverse strain sensitivities of the nitrogen-vacancy ground-state spin. The nitrogen-vacancy centre is an atomic scale sensor and we demonstrate spin-based strain imaging with a strain sensitivity of 3 × 10(-6) strain Hz(-1/2). Finally, we show how this spin-resonator system could enable coherent spin-phonon interactions in the quantum regime.

No MeSH data available.


Related in: MedlinePlus