Planar squeezing by quantum non-demolition measurement in cold atomic ensembles
Planar squeezed states, i.e. quantum states which are squeezed in two orthogonal spin components, have recently attracted attention due to their applications in atomic interferometry and quantum information (He et al 2012 New J. Phys. 14 093012). While canonical variables such as quadratures of the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/10/103031 |
| _version_ | 1797751823420882944 |
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| author | Graciana Puentes Giorgio Colangelo Robert J Sewell Morgan W Mitchell |
| author_facet | Graciana Puentes Giorgio Colangelo Robert J Sewell Morgan W Mitchell |
| author_sort | Graciana Puentes |
| collection | DOAJ |
| description | Planar squeezed states, i.e. quantum states which are squeezed in two orthogonal spin components, have recently attracted attention due to their applications in atomic interferometry and quantum information (He et al 2012 New J. Phys. 14 093012). While canonical variables such as quadratures of the radiation field can be squeezed in at most one component, simultaneous squeezing in two orthogonal spin components can be achieved due to the angular momentum commutation relations. We present a novel scheme for planar squeezing via quantum non-demolition (QND) measurements in spin-1 systems. The QND measurement is achieved via near-resonant paramagnetic Faraday rotation probing, and the planar squeezing is obtained by sequential QND measurement of two orthogonal spin components. We compute the achievable squeezing for a variety of optical depths, initial conditions and probing strategies. The planar squeezed states generated in this way contain entanglement detectable by spin-squeezing inequalities and give an advantage relative to non-squeezed states for any precession phase angle, a benefit for single-shot and high-bandwidth magnetometry. |
| first_indexed | 2024-03-12T16:54:11Z |
| format | Article |
| id | doaj.art-f8c46a153def4911b192bb5a7101bc92 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:54:11Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-f8c46a153def4911b192bb5a7101bc922023-08-08T11:03:24ZengIOP PublishingNew Journal of Physics1367-26302013-01-01151010303110.1088/1367-2630/15/10/103031Planar squeezing by quantum non-demolition measurement in cold atomic ensemblesGraciana Puentes0Giorgio Colangelo1Robert J Sewell2Morgan W Mitchell3ICFO—Institut de Ciencies Fotoniques , Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, SpainICFO—Institut de Ciencies Fotoniques , Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, SpainICFO—Institut de Ciencies Fotoniques , Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, SpainICFO—Institut de Ciencies Fotoniques , Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, Spain; ICREA—Institució Catalana de Recerca i Estudis Avançats , E-08015 Barcelona, SpainPlanar squeezed states, i.e. quantum states which are squeezed in two orthogonal spin components, have recently attracted attention due to their applications in atomic interferometry and quantum information (He et al 2012 New J. Phys. 14 093012). While canonical variables such as quadratures of the radiation field can be squeezed in at most one component, simultaneous squeezing in two orthogonal spin components can be achieved due to the angular momentum commutation relations. We present a novel scheme for planar squeezing via quantum non-demolition (QND) measurements in spin-1 systems. The QND measurement is achieved via near-resonant paramagnetic Faraday rotation probing, and the planar squeezing is obtained by sequential QND measurement of two orthogonal spin components. We compute the achievable squeezing for a variety of optical depths, initial conditions and probing strategies. The planar squeezed states generated in this way contain entanglement detectable by spin-squeezing inequalities and give an advantage relative to non-squeezed states for any precession phase angle, a benefit for single-shot and high-bandwidth magnetometry.https://doi.org/10.1088/1367-2630/15/10/103031 |
| spellingShingle | Graciana Puentes Giorgio Colangelo Robert J Sewell Morgan W Mitchell Planar squeezing by quantum non-demolition measurement in cold atomic ensembles New Journal of Physics |
| title | Planar squeezing by quantum non-demolition measurement in cold atomic ensembles |
| title_full | Planar squeezing by quantum non-demolition measurement in cold atomic ensembles |
| title_fullStr | Planar squeezing by quantum non-demolition measurement in cold atomic ensembles |
| title_full_unstemmed | Planar squeezing by quantum non-demolition measurement in cold atomic ensembles |
| title_short | Planar squeezing by quantum non-demolition measurement in cold atomic ensembles |
| title_sort | planar squeezing by quantum non demolition measurement in cold atomic ensembles |
| url | https://doi.org/10.1088/1367-2630/15/10/103031 |
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