Remote Parameter Estimation in a Quantum Spin Chain Enhanced by Local Control
classification
🪐 quant-ph
keywords
chaincontrolestimationparameterquantumprobequbitspin
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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.
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