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Enhancing sensitivity of an atom interferometer to the Heisenberg limit using increased quantum noise (Conference Presentation)
Author(s): Selim M. Shahriar
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Paper Abstract

In a conventional atomic interferometer employing N atoms, the phase sensitivity is at the standard quantum limit: 1/√N. Using spin-squeezing, the sensitivity can be increased, either by lowering the quantum noise or via phase amplification, or a combination thereof. Here, we show how to increase the sensitivity, to the Heisenberg limit of 1/N, while increasing the quantum noise by √N, thereby suppressing by the same factor the effect of excess noise. The proposed protocol makes use of a Schroedinger Cat (SC) state representing a mesoscopic superposition of two collective states of N atoms, behaving as a single entity with an N-fold increase in Compton frequency. The resulting N-fold phase magnification is revealed by using atomic state detection instead of collective state detection

Paper Details

Date Published: 5 March 2019
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Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109342O (5 March 2019); doi: 10.1117/12.2514791
Show Author Affiliations
Selim M. Shahriar, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 10934:
Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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