10-1103-PhysRevA-91-033616.pdf (539.77 kB)
Heisenberg-limited metrology with a squeezed vacuum state, three-mode mixing, and information recycling
journal contribution
posted on 2023-06-09, 04:39 authored by Behnam Tonekaboni, Simon A Haine, Stuart S SzigetiWe have previously shown that quantum-enhanced atom interferometry can be achieved by mapping the quantum state of squeezed optical vacuum to one of the atomic inputs via a beamsplitter-like process [Phys. Rev. A 90, 063630 (2014)]. Here we ask the question: is a better phase sensitivity possible if the quantum state transfer (QST) is described by a three-mode-mixing model, rather than a beamsplitter? The answer is yes, but only if the portion of the optical state not transferred to the atoms is incorporated via information recycling. Surprisingly, our scheme gives a better sensitivity for lower QST efficiencies and with a sufficiently large degree of squeezing can attain near-Heisenberg-limited sensitivities for arbitrarily small QST efficiencies. Furthermore, we use the quantum Fisher information to demonstrate the near optimality of our scheme.
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Physical Review AISSN
1050-2947Publisher
American Physical SocietyExternal DOI
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3Volume
91Page range
3616Department affiliated with
- Physics and Astronomy Publications
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- Atomic, Molecular and Optical Physics Research Group Publications
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2017-01-12First Open Access (FOA) Date
2017-01-12First Compliant Deposit (FCD) Date
2017-01-12Usage metrics
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