Imperial College London
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DrRyanBarnett

Faculty of Natural Sciences, Department of Mathematics

Reader in Condensed Matter Theory
 
 
 
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Contact

 

+44 (0)20 7594 8536r.barnett Website

 
 
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Location

 

6M49Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wrubel:2018:10.1103/PhysRevA.98.023620,
author = {Wrubel, JP and Schwettmann, A and Fahey, DP and Glassman, Z and Pechkis, HK and Griffin, PF and Barnett, R and Tiesinga, E and Lett, PD},
doi = {10.1103/PhysRevA.98.023620},
journal = {Physical Review A},
title = {Spinor Bose-Einstein-condensate phase-sensitive amplifier for SU(1,1) interferometry},
url = {http://dx.doi.org/10.1103/PhysRevA.98.023620},
volume = {98},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The SU(1,1) interferometer was originally conceived as a Mach-Zehnder interferometer with the beam splitters replaced by parametric amplifiers. The parametric amplifiers produce states with correlations that result in enhanced phase sensitivity. F=1 spinor Bose-Einstein condensates (BECs) can serve as the parametric amplifiers for an atomic version of such an interferometer by collisionally producing entangled pairs of |F=1,m=±1) atoms. We simulate the effect of single- and double-sided seeding of the inputs to the amplifier using the truncated-Wigner approximation. We find that single-sided seeding degrades the performance of the interferometer exactly at the phase the unseeded interferometer should operate the best. Double-sided seeding results in a phase-sensitive amplifier, where the maximal sensitivity is a function of the phase relationship between the input states of the amplifier. In both single- and double-sided seeding we find there exists an optimal phase shift that achieves sensitivity beyond the standard quantum limit. Experimentally, we demonstrate a spinor phase-sensitive amplifier using a BEC of Na23 in an optical dipole trap. This configuration could be used as an input to such an interferometer. We are able to control the initial phase of the double-seeded amplifier and demonstrate sensitivity to initial population fractions as small as 0.1%.
AU  - Wrubel,JP
AU  - Schwettmann,A
AU  - Fahey,DP
AU  - Glassman,Z
AU  - Pechkis,HK
AU  - Griffin,PF
AU  - Barnett,R
AU  - Tiesinga,E
AU  - Lett,PD
DO  - 10.1103/PhysRevA.98.023620
PY  - 2018///
SN  - 2469-9926
TI  - Spinor Bose-Einstein-condensate phase-sensitive amplifier for SU(1,1) interferometry
T2  - Physical Review A
UR  - http://dx.doi.org/10.1103/PhysRevA.98.023620
UR  - http://hdl.handle.net/10044/1/62947
VL  - 98
ER  -
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