Quantum metrology with open dynamical systems
This paper studies quantum limits to dynamical sensors in the presence of decoherence. A modified purification approach is used to obtain tighter quantum detection and estimation error bounds for optical phase sensing and optomechanical force sensing. When optical loss is present, these bounds are f...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/7/073005 |
| _version_ | 1797751571956629504 |
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| author | Mankei Tsang |
| author_facet | Mankei Tsang |
| author_sort | Mankei Tsang |
| collection | DOAJ |
| description | This paper studies quantum limits to dynamical sensors in the presence of decoherence. A modified purification approach is used to obtain tighter quantum detection and estimation error bounds for optical phase sensing and optomechanical force sensing. When optical loss is present, these bounds are found to obey shot-noise scalings for arbitrary quantum states of light under certain realistic conditions, thus ruling out the possibility of asymptotic Heisenberg error scalings with respect to the average photon flux under those conditions. The proposed bounds are expected to be approachable using current quantum optics technology. |
| first_indexed | 2024-03-12T16:50:28Z |
| format | Article |
| id | doaj.art-466514997a434b44b10549a4b64fd380 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:50:28Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-466514997a434b44b10549a4b64fd3802023-08-08T11:11:08ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115707300510.1088/1367-2630/15/7/073005Quantum metrology with open dynamical systemsMankei Tsang0Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, Singapore 117583, Singapore Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, SingaporeThis paper studies quantum limits to dynamical sensors in the presence of decoherence. A modified purification approach is used to obtain tighter quantum detection and estimation error bounds for optical phase sensing and optomechanical force sensing. When optical loss is present, these bounds are found to obey shot-noise scalings for arbitrary quantum states of light under certain realistic conditions, thus ruling out the possibility of asymptotic Heisenberg error scalings with respect to the average photon flux under those conditions. The proposed bounds are expected to be approachable using current quantum optics technology.https://doi.org/10.1088/1367-2630/15/7/073005 |
| spellingShingle | Mankei Tsang Quantum metrology with open dynamical systems New Journal of Physics |
| title | Quantum metrology with open dynamical systems |
| title_full | Quantum metrology with open dynamical systems |
| title_fullStr | Quantum metrology with open dynamical systems |
| title_full_unstemmed | Quantum metrology with open dynamical systems |
| title_short | Quantum metrology with open dynamical systems |
| title_sort | quantum metrology with open dynamical systems |
| url | https://doi.org/10.1088/1367-2630/15/7/073005 |
| work_keys_str_mv | AT mankeitsang quantummetrologywithopendynamicalsystems |