Heisenberg-limited Frequency Estimation via Driving through Quantum Phase Transitions

• URL: http://arxiv.org/abs/2108.13126v2
• Date: Fri, 3 Sep 2021 02:54:35 GMT
• Title: Heisenberg-limited Frequency Estimation via Driving through Quantum Phase Transitions
• Authors: Min Zhuang, Hongtao Huo, Yuxiang Qiu, Wenjie Liu, Jiahao Huang, and Chaohong Lee
• Abstract summary: We propose a quantum Ramsey interferometry to realize high-precision frequency estimation in spin-1 Bose-Einstein condensate. Our scheme does not require single-particle resolved detection and is within the reach of current experiment techniques.
• Score: 1.4985830312023636
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-precision frequency estimation is an ubiquitous issue in fundamental physics and a critical task in spectroscopy. Here, we propose a quantum Ramsey interferometry to realize high-precision frequency estimation in spin-1 Bose-Einstein condensate via driving the system through quantum phase transitions(QPTs). In our scheme, we combine adiabatically driving the system through QPTs with {\pi}/2 pulse to realize the initialization and recombination. Through adjusting the laser frequency under fixed evolution time, one can extract the transition frequency via the lock-in point. The lock-in point can be determined from the pattern of the population measurement. In particular, we find the measurement precision of frequency can approach to the Heisenberg-limited scaling. Moreover, the scheme is robust against detection noise and non-adiabatic effect. Our proposed scheme does not require single-particle resolved detection and is within the reach of current experiment techniques. Our study may point out a new way for high-precision frequency estimation.

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