Multiqubit systems: highly entangled states and entanglement distribution

A Borras, AR Plastino, J Batle, C Zander… - Journal of Physics A …, 2007 - iopscience.iop.org
A comparison is made of various searching procedures, based upon different entanglement
measures or entanglement indicators, for highly entangled multiqubits states. In particular …

Connection between entanglement and the speed of quantum evolution

J Batle, M Casas, A Plastino, AR Plastino - Physical Review A—Atomic …, 2005 - APS
It has been recently pointed out [V. Giovannetti, S. Lloyd, and L. Maccone, Europhys. Lett.
62, 615 (2003)] that, for certain classes of states, quantum entanglement enhances the …

Entanglement and the lower bounds on the speed of quantum evolution

A Borras, M Casas, AR Plastino, A Plastino - Physical Review A—Atomic …, 2006 - APS
The concept of quantum speed limit-time (QSL) was initially introduced as a lower bound to
the time interval that a given initial state ψ I may need so as to evolve into a state orthogonal …

Rank-three bipartite entangled states are distillable

L Chen, YX Chen - Physical Review A—Atomic, Molecular, and Optical …, 2008 - APS
We prove that rank-three bipartite entangled states are distillable. So there are no bound
rank-three bipartite entangled states. By using this fact, we present some families of rank …

From the quantum relative tsallis entropy to its conditional form: separability criterion beyond local and global spectra

AK Rajagopal, Sudha, AS Nayak, ARU Devi - Physical Review A, 2014 - APS
The quantum relative Rényi entropy of two noncommuting density matrices was recently
defined from which its conditional entropy is deduced. This framework is here extended to …

Maximally entangled mixed states and conditional entropies

J Batle, M Casas, A Plastino, AR Plastino - Physical Review A—Atomic …, 2005 - APS
The maximally entangled mixed states of Munro [Phys. Rev. A 64, 030302 (2001)] are
shown to exhibit interesting features vis á vis conditional entropic measures. The same …

Bipartite separability of symmetric N-qubit noisy states using conditional quantum relative Tsallis entropy

AS Nayak, AK Rajagopal, ARU Devi - Physica A: Statistical Mechanics …, 2016 - Elsevier
In any bipartition of a quantum state, it is proved that the negative values of the conditional
version of sandwiched Tsallis relative entropy necessarily imply quantum entanglement. For …

Entropic entanglement criteria for Fermion systems

C Zander, AR Plastino, M Casas, A Plastino - The European Physical …, 2012 - Springer
Entanglement criteria for general (pure or mixed) states of systems consisting of two
identical fermions are introduced. These criteria are based on appropriate inequalities …

Conditions on separability in multiqubit systems with an accelerating qubit using a conditional entropy

HM Reji, HS Hegde, R Prabhu - arXiv preprint arXiv:2404.02716, 2024 - arxiv.org
The separability in multiqubit pure and mixed GHZ and W states with an accelerating qubit
has been characterized using Abe Rajagopal (AR) $ q $-conditional entropy. We observe …

Thermal entanglement of Hubbard dimers in the nonextensive statistics

H Hasegawa - Physica A: Statistical Mechanics and its Applications, 2011 - Elsevier
The thermal entanglement of the Hubbard dimer (two-site Hubbard model) has been studied
with the nonextensive statistics. We have calculated the auto-correlation (Oq), pair …