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Matter-wave interferometry of a levitated thermal nano-oscillator induced and probed by a spin
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Scala, M., Kim, M. S., Morley, Gavin, Barker, P. F. and Bose, S. (2013) Matter-wave interferometry of a levitated thermal nano-oscillator induced and probed by a spin. Physical Review Letters, Volume 111 (Number 18). Article: 180403. doi:10.1103/PhysRevLett.111.180403 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.111.180403
Abstract
We show how the interference between spatially separated states of the center of mass (c.m.) of a mesoscopic harmonic oscillator can be evidenced by coupling it to a spin and performing solely spin manipulations and measurements (Ramsey interferometry). We propose to use an optically levitated diamond bead containing a nitrogen-vacancy center spin. The nanoscale size of the bead makes the motional decoherence due to levitation negligible. The form of the spin-motion coupling ensures that the scheme works for thermal states so that moderate feedback cooling suffices. No separate control or observation of the c.m. state is required and thereby one dispenses with cavities, spatially resolved detection, and low-mass-dispersion ensembles. The controllable relative phase in the Ramsey interferometry stems from a gravitational potential difference so that it uniquely evidences coherence between states which involve the whole nanocrystal being in spatially distinct locations.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 1 November 2013 | ||||
Dates: |
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Volume: | Volume 111 | ||||
Number: | Number 18 | ||||
Page Range: | Article: 180403 | ||||
DOI: | 10.1103/PhysRevLett.111.180403 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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