How to Project onto an Arbitrary Single-Photon Wavepacket
| Autor: | Propp, Tzula B., van Enk, Steven J. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 102, 053707 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.102.053707 |
| Popis: | The time-frequency degree of freedom of the electromagnetic field is the final frontier for single-photon measurements. The temporal and spectral distribution a measurement retrodicts (that is, the state it projects onto) is determined by the detector's intrinsic resonance structure. In this paper, we construct ideal and more realistic positive operator-valued measures (POVMs) that project onto arbitrary single-photon wavepackets with high efficiency and low noise. We discuss applications to super-resolved measurements and quantum communication. In doing so we will give a fully quantum description of the entire photo detection process, give prescriptions for (in principle) performing single-shot Heisenberg-limited time-frequency measurements of single photons, and discuss fundamental limits and trade-offs inherent to single-photon detection. Comment: 14 pages, 6 figures |
| Databáze: | arXiv |
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