Achieving sub-shot-noise sensing at finite temperatures
We investigate sensing of magnetic fields using quantum spin chains at finite temperature and exploit quantum phase crossovers to improve metrological bounds on the estimation of the chain parameters. In particular, we analyze the XX spin chain and show that the magnetic sensitivity of this system i...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Published: |
American Physical Society
2016
|
| Online Access: | https://eprints.nottingham.ac.uk/46867/ |