Approaching Heisenberg-scalable thermometry with built-in robustness
against noise
- URL: http://arxiv.org/abs/2207.03808v1
- Date: Fri, 8 Jul 2022 10:27:59 GMT
- Title: Approaching Heisenberg-scalable thermometry with built-in robustness
against noise
- Authors: Da-Jian Zhang and D. M. Tong
- Abstract summary: We propose an entanglement-free scheme of thermometry to approach Heisenberg scaling for a wide range of $N$.
Our scheme is amenable to a variety of experimental setups.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: It is a major goal in quantum thermometry to reach a $1/N$ scaling of
thermometric precision known as Heisenberg scaling but is still in its infancy
to date. The main obstacle is that the resources typically required are highly
entangled states, which are very difficult to produce and extremely vulnerable
to noises. Here, we propose an entanglement-free scheme of thermometry to
approach Heisenberg scaling for a wide range of $N$, which has built-in
robustness irrespective of the type of noise in question. Our scheme is
amenable to a variety of experimental setups. Moreover, it can be used as a
basic building block for promoting previous proposals of thermometry to reach
Heisenberg scaling, and its applications are not limited to thermometry but can
be straightforwardly extended to other metrological tasks.
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