# Fisher information as a generalized measure of coherence in classical and quantum optics.

@article{Luis2012FisherIA, title={Fisher information as a generalized measure of coherence in classical and quantum optics.}, author={Alfredo Luis}, journal={Optics express}, year={2012}, volume={20 22}, pages={ 24686-98 } }

We show that metrological resolution in the detection of small phase shifts provides a suitable generalization of the degrees of coherence and polarization. Resolution is estimated via Fisher information. Besides the standard two-beam Gaussian case, this approach provides also good results for multiple field components and nonGaussian statistics. This works equally well in quantum and classical optics.

## 11 Citations

### Quantum metrology and coherence

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### Multiparameter estimation, lower bound on quantum Fisher information, and non-Markovianity witnesses of noisy two-qubit systems

- Computer ScienceQuantum Inf. Process.
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- PhysicsPhysical Review Research
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We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We focus on the particular condition of two-photon resonance and obtain analytical expressions for…

### Resource-theoretic approach to vectorial coherence.

- PhysicsOptics letters
- 2018

A formal resource-theoretic approach to assess the coherence between partially polarized electromagnetic fields, identifying two resource theories for the vectorial coherence: polarization-sensitive coherence and polarization-insensitive coherence.

### Multimode Sensor of Fluids Based on Porous Film

- Physics
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Abstract Multimode interferometers are coming of age both as sensors and components of quantum circuits.Here we investigate an interferometer based on a porous thinfilm sensor of refractive index of…

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