Enhancing sensitivity of an atom interferometer to the Heisenberg limit using increased quantum noise (Conference Presentation)

Selim M. Shahriar

doi:10.1117/12.2514791

5 March 2019 Enhancing sensitivity of an atom interferometer to the Heisenberg limit using increased quantum noise (Conference Presentation)

Selim M. Shahriar

Author Affiliations +

Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 109342O (2019) https://doi.org/10.1117/12.2514791
Event: SPIE OPTO, 2019, San Francisco, California, United States

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

Conference Presentation

Citation Download Citation

Selim M. Shahriar "Enhancing sensitivity of an atom interferometer to the Heisenberg limit using increased quantum noise (Conference Presentation)", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109342O (5 March 2019); https://doi.org/10.1117/12.2514791

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