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Overcoming the Standard Quantum Limit in Gravitational Wave Detectors Using Spin Systems with a Negative Effective Massстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 сентября 2018 г.
- Авторы: Khalili F.Ya, Polzik E.S.
- Журнал: Physical Review Letters
- Том: 121
- Номер: 3
- Год издания: 2018
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 031101
- DOI: 10.1103/PhysRevLett.121.031101
- Аннотация: Quantum backaction (QBA) of a measurement limits the precision of observation of the motion of a free mass. This profound effect, dubbed the “Heisenberg microscope” in the early days of quantum mechanics, leads to the standard quantum limit (SQL) stemming from the balance between the measurement sensitivity and the QBA. We consider the measurement of motion of a free mass performed in a quantum reference frame with an effective negative mass which is not limited by QBA. As a result, the disturbance on the motion of a free mass can be measured beyond the SQL. QBA-limited detection of motion for a free mass is extremely challenging, but there are devices where this effect is expected to play an essential role, namely, gravitational wave detectors (GWDs) such as LIGO and Virgo. Recent reports on the observations of gravitational waves have opened new horizons in cosmology and astrophysics. We present a general idea and a detailed numerical analysis for QBA-evading measurement of the gravitational wave effect on the GWD mirrors, which can be considered free masses under relevant conditions. The measurement is performed by two entangled beams of light, probing the GWD and an auxiliary atomic spin ensemble, respectively. The latter plays the pffiffiffiffiffiffi role of a free negative mass. We show that under realistic conditions the sensitivity of the GWD in m= Hz can be increased by 6 dB over the entire frequency band of interest.
- Добавил в систему: Халили Фарит Явдатович