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Quantum Estimation of Magnetic-field Gradient Using W-state
Quantum metrology Magnetic-field gradient W-state Cold atoms
2016/1/22
We study the precision limits of detecting a linear magnetic-field gradient by using W-states in the presence of different types of noises. We consider to use an atomic spin chain for probing the magn...
Uncertainty Relation Revisited from Quantum Estimation Theory
Uncertainty Relation Revisited Quantum Estimation Theory
2010/11/5
By invoking quantum estimation theory we formulate the uncertainty relation for arbitrary quantum states and measurements in a finite-dimensional Hilbert space. To obtain information about the quantum...
On quantum estimation, quantum cloning and finite quantum de Finetti theorems
On quantum estimation quantum cloning finite quantum de Finetti theorems
2010/11/4
This paper presents a series of results on the interplay between quantum estimation, cloning and finite de Finetti theorems. First, we consider the measure-and-prepare channel that uses optimal estim...