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Tolerance in the Ramsey interference of a trapped nanodiamond
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Wan, C., Scala, M., Bose, S., Frangeskou, Angelo, Rahman, A. T. M. A., Morley, Gavin, Barker, P. F. and Kim, M. S. (2016) Tolerance in the Ramsey interference of a trapped nanodiamond. Physical Review A, 93 (4). 043852. doi:10.1103/PhysRevA.93.043852
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WRAP_1074372-px-300516-accepted_version_before_proofs_wan_pra16.pdf - Accepted Version - Requires a PDF viewer. Download (897Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevA.93.043852
Abstract
In the scheme recently proposed by M. Scala et al. [Phys. Rev. Lett. 111, 180403 (2013)], a gravity-dependent phase shift is induced on the spin of a nitrogen-vacancy (NV) center in a trapped nanodiamond by the interaction between its magnetic moment and the quantized motion of the particle. This provides a way to detect spatial quantum superpositions by means of only spin measurements. Here, the effect of unwanted coupling with other motional degrees of freedom is considered, and we show that it does not affect the validity of the scheme. Both this coupling and the additional error source due to misalignment between the quantization axis of the NV center spin and the trapping axis are shown not to change the qualitative behavior of the system, so that a proof-of-principle experiment can be neatly performed. Our analysis, which shows that the scheme retains the important features of not requiring ground-state cooling and of being resistant to thermal fluctuations, can be useful for several schemes which have been proposed recently for testing macroscopic superpositions in trapped microsystems.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Nanodiamonds -- Experiments, Quantum theory, Microphysics | ||||||||
| Journal or Publication Title: | Physical Review A | ||||||||
| Publisher: | American Physical Society | ||||||||
| ISSN: | 1050-2947 | ||||||||
| Official Date: | 17 April 2016 | ||||||||
| Dates: |
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| Volume: | 93 | ||||||||
| Number: | 4 | ||||||||
| Article Number: | 043852 | ||||||||
| DOI: | 10.1103/PhysRevA.93.043852 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain), Chinese Scholarship Council (CSC) | ||||||||
| Grant number: | EP/J014664/1, EP/M013243/1 |
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