Symmetric Logarithmic Derivative of Fermionic Gaussian States
arXiv:1912.12313 · doi:10.3390/e20070485
Abstract
In this article we derive a closed form expression for the symmetric logarithmic derivative of Fermionic Gaussian states. This provides a direct way of computing the quantum Fisher Information for Fermionic Gaussian states. Applications ranges from quantum Metrology with thermal states and non-equilibrium steady states with Fermionic many-body systems.
arXiv comment15 pages. arXiv admin note: substantial text overlap with arXiv:1911.10196; text overlap with arXiv:1608.02634 by other authors
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