activity
20172025
most citedThe von Neumann Entropy for Mixed States

13 citations · 19 across the 10 of their papers we have counts for

collaborators

10 papers

quant-ph2025

The anisotropic quantum Rabi model with diamagnetic term

Jorge A. Anaya-Contreras, Irán Ramos-Prieto, Arturo Zúñiga-Segundo +1

We employ a squeeze operator transformation approach to solve the anisotropic quantum Rabi model that includes a diamagnetic term. By carefully adjusting the amplitude of the diama…

quant-ph2021★ 3 cited

Multiphoton processes via conditional measurements in the two-field interaction

J. A. Anaya-Contreras, A. Zúñiga-Segundo, A. Perez-Leija +2

In this contribution, we show that the use of conditional measurements in the resonant interaction of two quantized electromagnetic fields gives rise to nonclassical multiphoton pr…

physics.optics2021★ 2 cited

Generation of Talbot-like fields

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, D. Sánchez-de-la-Llave +1

We present an integral of diffraction based on particular eigenfunctions of the Laplacian in two dimensions. We show how to propagate some fields, in particular a Bessel field, a s…

quant-ph2020★ 1 cited

Airy eigenstates and their relation to coordinate eigenstates

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, Héctor M. Moya-Cessa

We study the eigenvalue problem for a linear potential Hamiltonian and, by writing Airy equation in terms of momentum and position operators define Airy states. We give a solution…

quant-ph2019

Purification Hamiltonians

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, Héctor M. Moya-Cessa

We study the Jaynes-Cummings interaction when initial mixed states, for the atom or the field, are considered. The evolved mixed field density matrix is purified to a wavefunction…

quant-ph2019

Quasiprobability distribution functions from fractional Fourier transforms

Jorge A. Anaya-Contreras, A. Zúñiga-Segundo, Héctor M. Moya-Cessa

We show, in a formal way, how a class of complex quasiprobability distribution functions may be introduced by using the fractional Fourier transform. This leads to the Fresnel tran…

physics.optics2019

Squeeze operators in classical scenarios

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, Francisco Soto-Eguibar +2

We analyse the paraxial field propagation in the realm of classical optics, showing that it can be written as the action of the fractional Fourier transform, followed by the squeez…

quant-ph2018

Entropy fluctuations as a mixedness quantifier

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, Héctor M. Moya-Cessa

We propose a mixedness quantifier based on entropy fluctuations. It provides information about the degree of mixedness either for finite dimensional and infinite dimensional Hilber…

quant-ph2018★ 13 cited

The von Neumann Entropy for Mixed States

Jorge A. Anaya-Contreras, Héctor M. Moya-Cessa, Arturo Zúñiga-Segundo

The Araki-Lieb inequality is commonly used to calculate the entropy of subsystems when they are initially in pure states as this forces the entropy of the two subsystems to be equa…

quant-ph2017

Multiphoton processes by conditional measurements in the atom-field interaction

Jorge A. Anaya-Contreras, Arturo Zúñiga-Segundo, Francisco Soto-Eguibar +1

We show that it is possible to add or subtract many photons from a cavity field by interacting it resonantly with a two-level atom. The atom, after entangling with the field inside…