Quantum-enhanced spectroscopy with entangled multiphoton states

Hossein T. Dinani, Manish K. Gupta, Jonathan P. Dowling, Dominic W. Berry

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Traditionally, spectroscopy is performed by examining the position of absorption lines. However, at frequencies near the transition frequency, additional information can be obtained from the phase shift. In this work we consider the information about the transition frequency obtained from both the absorption and the phase shift, as quantified by the Fisher information in an interferometric measurement. We examine the use of multiple single-photon states, NOON states, and numerically optimized states that are entangled and have multiple photons. We find the optimized states that improve over the standard quantum limit set by independent single photons for some atom number densities.

LanguageEnglish
Article number063804
Pages1-6
Number of pages6
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume93
Issue number6
DOIs
Publication statusPublished - 7 Jun 2016

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photons
phase shift
spectroscopy
Fisher information
atoms

Cite this

Dinani, Hossein T. ; Gupta, Manish K. ; Dowling, Jonathan P. ; Berry, Dominic W. / Quantum-enhanced spectroscopy with entangled multiphoton states. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2016 ; Vol. 93, No. 6. pp. 1-6.
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Quantum-enhanced spectroscopy with entangled multiphoton states. / Dinani, Hossein T.; Gupta, Manish K.; Dowling, Jonathan P.; Berry, Dominic W.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 93, No. 6, 063804, 07.06.2016, p. 1-6.

Research output: Contribution to journalArticleResearchpeer-review

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