Quantum Vector DC Magnetometry via Selective Phase Accumulation
- URL: http://arxiv.org/abs/2308.02102v1
- Date: Fri, 4 Aug 2023 01:29:45 GMT
- Title: Quantum Vector DC Magnetometry via Selective Phase Accumulation
- Authors: Min Zhuang, Sijie Chen, Jiahao Huang, and Chaohong Lee
- Abstract summary: We propose a general protocol for quantum vector DC magnetometry via selective phase accumulation of both non-entangled and entangled quantum probes.
If the input state is an entangled state such as the Greenberger-Horne-Zeilinger state, the measurement precisions of all three components may approach the Heisenberg limit.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Precision measurement of magnetic fields is an important goal for fundamental
science and practical sensing technology. Sensitive detection of a vector
magnetic field is a crucial issue in quantum magnetometry, it remains a
challenge to estimate a vector DC magnetic field with high efficiency and high
precision. Here, we propose a general protocol for quantum vector DC
magnetometry via selective phase accumulation of both non-entangled and
entangled quantum probes. Based upon the Ramsey interferometry, our protocol
may achieve selective phase accumulation of only one magnetic field component
by inserting well-designed pulse sequence. In the parallel scheme, three
parallel quantum interferometries are utilized to estimate three magnetic field
components independently.In the sequential scheme, by applying a pulse sequence
along different directions, three magnetic field components can be estimated
simultaneously via only one quantum interferometry. In particular, if the input
state is an entangled state such as the Greenberger-Horne-Zeilinger state, the
measurement precisions of all three components may approach the Heisenberg
limit. Our study not only develops a general protocol for measuring vector
magnetic fields via quantum probes, but also provides a feasible way to achieve
Heisenberg-limited multi-parameter estimation via many-body quantum
entanglement.
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