Jukka Kiukas, Kazuya Yuasa, Daniel Burgarth
Published 2017-01-25Version 1
We study the interplay of control and parameter estimation on a quantum spin chain. A single qubit probe is attached to one end of the chain, while we wish to estimate a parameter on the other end. We find that control on the probe qubit can substantially improve the estimation performance and discover some interesting connections to quantum state transfer.
Comments: 7 pages, 3 figures
Quantum state transfer in a XX chain with impurities
Effects of impurity on fidelity of quantum state transfer via spin channels
Quantum thermodynamics with local control
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