Distributed quantum metrology with a single squeezed-vacuum source
We propose an interferometric scheme for the estimation of a linear combination with non-negative weights of an arbitrary number M>1 of unknown phase delays, distributed across an M-channel linear optical network, with Heisenberg-limited sensitivity. This is achieved without the need of any sourc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-11-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.1.032024 |
| Summary: | We propose an interferometric scheme for the estimation of a linear combination with non-negative weights of an arbitrary number M>1 of unknown phase delays, distributed across an M-channel linear optical network, with Heisenberg-limited sensitivity. This is achieved without the need of any sources of photon-number or entangled states, photon-number-resolving detectors, or auxiliary interferometric channels. Indeed, the proposed protocol remarkably relies upon a single squeezed-state source, an antisqueezing operation at the interferometer output, and on-off photodetectors. |
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| ISSN: | 2643-1564 |