Wave packet dynamics, time scales and phase diagram in the IBM-Lipkin–Meshkov–Glick model

Castaños, Octavio; Santos, Francisco; Yáñez, R. J.; Romera, E.

doi:10.1016/j.aop.2017.11.034

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The Ibm-lmg Model1

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“…(light-green area). A detailed analysis of the phase diagram for this model is made in [42]. The critical points are over the black lines.…”

Section: The Ibm-lmg Modelmentioning

confidence: 99%

Entanglement and quantum phase diagrams of symmetric multi-qubit systems

2017

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For general symmetric multi-qubit systems, the behavior of oneand two-qubit entanglement for Dicke, spin coherent and parity-adapted (even and odd) spin coherent states is determined. These quantum correlations are quantified by linear and von Neumann entropies of the corresponding one-and two-qubit reduced density matrices of the multi-qubit system. These states play a fundamental role in the study of Hamiltonian systems written in terms of collective generators of the angular momentum algebra like, for example, the Lipkin-Meshkov-Glick (LMG) model. Here we shall use these entanglement measures as a signature to characterize the dierent quantum phases that appear in these models.

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“…(light-green area). A detailed analysis of the phase diagram for this model is made in [42]. The critical points are over the black lines.…”

Section: The Ibm-lmg Modelmentioning

confidence: 99%