Signal detection without finite-energy limits to quantum resolution
We show that there are extremely simple signal detection schemes where the finiteness of energy resources places no limit on the resolution. On the contrary, larger resolution can be obtained with lower energy. To this end the generator of the signal-dependent transformation encoding the signal info...
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| Tipo de documento: | artigo |
| Data de publicação: | 2013 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/34656 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/34656 |
| Access Level: | Acceso aberto |
| Palavra-chave: | 535 Quantum metrology Quantum limits Uncertainty relations Óptica (Física) 2209.19 Óptica Física |
| Resumo: | We show that there are extremely simple signal detection schemes where the finiteness of energy resources places no limit on the resolution. On the contrary, larger resolution can be obtained with lower energy. To this end the generator of the signal-dependent transformation encoding the signal information on the probe state must be different from the energy. We show that the larger the deviation of the probe state from being the minimum-uncertainty state, the better the resolution. |
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