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Spectrum Estimation of Density Operators with Alkaline-Earth Atoms

Beverland, Michael E. and Haah, Jeongwan and Alagic, Gorjan and Campbell, Gretchen K. and Rey, Ana Maria and Gorshkov, Alexey V. (2018) Spectrum Estimation of Density Operators with Alkaline-Earth Atoms. Physical Review Letters, 120 (2). Art. No. 025301. ISSN 0031-9007. doi:10.1103/PhysRevLett.120.025301.

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We show that Ramsey spectroscopy of fermionic alkaline-earth atoms in a square-well trap provides an efficient and accurate estimate for the eigenspectrum of a density matrix whose n copies are stored in the nuclear spins of n such atoms. This spectrum estimation is enabled by the high symmetry of the interaction Hamiltonian, dictated, in turn, by the decoupling of the nuclear spin from the electrons and by the shape of the square-well trap. Practical performance of this procedure and its potential applications to quantum computing and time keeping with alkaline-earth atoms are discussed.

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Additional Information:© 2018 American Physical Society. Received 5 August 2016; revised manuscript received 25 October 2017; published 9 January 2018. We thank S. P. Jordan, J. Preskill, K. R. A. Hazzard, M. Foss-Feig, P. Richerme, M. Maghrebi, and R. de Wolf for discussions. This work was supported by NSF JQI-PFC, NSF IQIM-PFC-1125565, NSF JILA-PFC-1734006, NSF-QIS, NIST, ARO, ARO MURI, ARL CDQI, DARPA (W911NF-16-1-0576 through the ARO), AFOSR, and the Gordon and Betty Moore foundations. M. E. B. and A. V. G. acknowledge the Centro de Ciencias de Benasque Pedro Pascual for hospitality. J. H. is supported by a Pappalardo Fellowship in Physics at MIT.
Group:Institute for Quantum Information and Matter
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National Institute of Standards and Technology (NIST)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Army Research Laboratory (ARL)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)W911NF-16-1-0576
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Massachusetts Institute of Technology (MIT)UNSPECIFIED
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Record Number:CaltechAUTHORS:20170123-122232253
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73621
Deposited By: Melissa Ray
Deposited On:24 Jan 2017 15:47
Last Modified:11 Nov 2021 05:19

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