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pro vyhledávání: '"Calixto, Manuel"'
Zero energy eigenstates $\psi_0(\theta)$ of the twisted bilayer graphene Hamiltonian at the Dirac point show a high sensitivity to the twist angle $\theta$ near the magic angles where the effective Fermi velocity vanishes. We use information theory m
Externí odkaz:
http://arxiv.org/abs/2409.07935
Autor:
Calixto, Manuel, Castaños, Octavio
Localization and entanglement properties of edge states of HgTe quantum wells in a finite strip geometry of width $L$ are studied under quantum information concepts such as: 1) inverse participation ratio (IPR), which measures localization, and 2) en
Externí odkaz:
http://arxiv.org/abs/2407.12469
We study phase-space properties of critical, parity symmetric, $N$-quDit systems undergoing a quantum phase transition (QPT) in the thermodynamic $N\to\infty$ limit. The $D=3$ level (qutrit) Lipkin-Meshkov-Glick (LMG) model is eventually examined as
Externí odkaz:
http://arxiv.org/abs/2302.06254
In this paper we study the entanglement in symmetric $N$-quDit systems. In particular we use generalizations to $U(D)$ of spin $U(2)$ coherent states and their projections on definite parity $\mathbb{C}\in\mathbb{Z}_2^{D-1}$ (multicomponent Schr\"odi
Externí odkaz:
http://arxiv.org/abs/2301.09193
In this paper we pursue the use of information measures (in particular, information diagrams) for the study of entanglement in symmetric multi-quDit systems. We use generalizations to U(D) of spin U(2) coherent states and their adaptation to parity (
Externí odkaz:
http://arxiv.org/abs/2111.14455
Publikováno v:
Quantum Information Processing (2021) 20:304
Collective spin operators for symmetric multi-quDit (namely, identical $D$-level atom) systems generate a U$(D)$ symmetry. We explore generalizations to arbitrary $D$ of SU(2)-spin coherent states and their adaptation to parity (multicomponent Schr\"
Externí odkaz:
http://arxiv.org/abs/2104.10581
Publikováno v:
J. Math. Phys. 60 103506 (2019)
We review the definition of hypergeometric coherent states, discussing some representative examples. Then we study mathematical and statistical properties of hypergeometric Schr\"odinger cat states, defined as orthonormalized eigenstates of $k$-th po
Externí odkaz:
http://arxiv.org/abs/1910.08180
Publikováno v:
In Physica A: Statistical Mechanics and its Applications 1 November 2022 605
Publikováno v:
Journal of Physics: Conference Series; 2024, Vol. 2883 Issue 1, p1-12, 12p
Autor:
Calixto, Manuel, Perez-Romero, Emilio
Publikováno v:
J. Phys. A: Math. Theor. 48 (2015) 495304 (15pp)
We analyze mathematical and physical properties of a previously introduced [J. Phys. A47, 115302 (2014)] family of $U(4)$ coherent states (CS). They constitute a matrix version of standard spin $U(2)$ CS when we add an extra (pseudospin) dichotomous
Externí odkaz:
http://arxiv.org/abs/1506.01541