Factorization and criticality in the anisotropic XY chain via correlations

B Çakmak, G Karpat, FF Fanchini - Entropy, 2015 - mdpi.com
In this review, we discuss the zero and finite temperature behavior of various bipartite
quantum and total correlation measures, the skew information-based quantum coherence …

Quantum coherence and uncertainty in the anisotropic XY chain

G Karpat, B Çakmak, FF Fanchini - Physical Review B, 2014 - APS
We explore the local quantum coherence and the local quantum uncertainty, based on
Wigner-Yanase skew information, in the ground state of the anisotropic spin-1/2 XY chain in …

Multi-body entanglement and information rearrangement in nuclear many-body systems: a study of the Lipkin–Meshkov–Glick model

SM Hengstenberg, CEP Robin, MJ Savage - The European Physical …, 2023 - Springer
We examine how effective-model-space (EMS) calculations of nuclear many-body systems
rearrange and converge multi-particle entanglement. The generalized Lipkin–Meshkov …

Quantum discord in finite chains

L Ciliberti, R Rossignoli, N Canosa - … Review A—Atomic, Molecular, and Optical …, 2010 - APS
We examine the quantum discord between two spins in the exact ground state of finite spin-
1/2 arrays with anisotropic XY couplings in a transverse field B. It is shown that in the vicinity …

Criticality, factorization, and long-range correlations in the anisotropic model

S Campbell, J Richens, NL Gullo, T Busch - Physical Review A—Atomic …, 2013 - APS
We study the long-range quantum correlations in the anisotropic XY model. By first
examining the thermodynamic limit, we show that employing the quantum discord as a figure …

Genuine multipartite entanglement in the model

SM Giampaolo, BC Hiesmayr - Physical Review A—Atomic, Molecular, and …, 2013 - APS
We analyze the XY model characterized by an anisotropy γ in an external magnetic field, h,
with respect to its genuine multipartite entanglement content (in the thermodynamic and …

Entanglement quantification by local unitary operations

A Monras, G Adesso, SM Giampaolo, G Gualdi… - Physical Review A …, 2011 - APS
Invariance under local unitary operations is a fundamental property that must be obeyed by
every proper measure of quantum entanglement. However, this is not the only aspect of …

Fermionic entanglement in the Lipkin model

M Di Tullio, R Rossignoli, M Cerezo, N Gigena - Physical Review A, 2019 - APS
We examine the fermionic entanglement in the ground state of the fermionic Lipkin model
and its relation with bipartite entanglement. It is first shown that the one-body entanglement …

Detection of an unbroken phase of a non-Hermitian system via a Hermitian factorization surface

LGC Lakkaraju, A Sen - Physical Review A, 2021 - APS
In the traditional quantum theory, one-dimensional quantum spin models possess a
factorization surface where the ground states are fully separable and have vanishing …

Factorization and Criticality in Finite Systems of Arbitrary Spin

M Cerezo, R Rossignoli, N Canosa, E Ríos - Physical review letters, 2017 - APS
We analyze ground state (GS) factorization in general arrays of spins si with XXZ couplings
immersed in nonuniform fields. It is shown that an exceptionally degenerate set of …