Reply to Comment - Quantum Optics
Properties of quantum coherence and correlations in quasi-entangled coherent states
Quaid-i-Azam University, 45320, Islamabad, Pakistan
2 FUUAST Islamabad, Islamabad, Pakistan
Accepted: 6 September 2021
Published online: 6 October 2021
We investigate the validity of quantum Fisher information (QFI) as a helpful coherence quantifier by drawing a comparison with first-order coherence (FOC) and some other relevant quantifiers to study the coherence and correlations in the quasi-Werner entangled coherent states (quasi-WECS). We identify QFI as a more useful coherence quantifier as it quantifies coherences of individual subsystems and correlations between them. On the other hand, FOC identifies coherences present in the individual subsystems only. Our results show that all of these coherence quantifiers follow the same behavior toward their maximum (or minimum) values for experimentally achievable values of the mean photon number.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021