Quantum-enhanced interferometry with weak thermal light
Creators
-
1.
Boeing (United States)
-
2.
Louisiana State University
-
3.
Lehman College
-
4.
University of Rochester
Abstract
We propose and implement a procedure for enhancing the sensitivity with which one can determine the phase shift experienced by a thermal light beam possessing on average fewer than four photons in passing through an interferometer. Our procedure entails subtracting exactly one (which can be generalized to m) photon from the light field exiting an interferometer containing a phase-shifting element in one of its arms. As a consequence of the process of photon subtraction, the mean photon number and signal-to-noise ratio (SNR) of the resulting light field are increased, leading to an enhancement of the SNR of the interferometric signal for that fraction of the incoming data that leads to photon subtraction.
Additional Information
© 2017 Optical Society of America. Received 22 August 2016; revised 16 February 2017; accepted 27 March 2017 (Doc. ID 274217); published 20 April 2017. We acknowledge funding from the Defense Advanced Research Projects Agency. Funding: Defense Advanced Research Projects Agency (DARPA).Attached Files
Published - optica-4-4-487.pdf
Submitted - 1605.05424.pdf
Supplemental Material - optica44487s001.PDF
Files
1605.05424.pdf
Additional details
Additional titles
- Alternative title
- Interferometry with Photon-Subtracted Thermal Light
Identifiers
- Eprint ID
- 97159
- Resolver ID
- CaltechAUTHORS:20190716-083419604
Related works
- Describes
- https://arxiv.org/abs/1605.05424 (URL)
Funding
- Defense Advanced Research Projects Agency (DARPA)
Dates
- Created
-
2019-07-16Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field