Wonmin Son - Academia.edu (original) (raw)
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CSIC (Consejo Superior de Investigaciones Científicas-Spanish National Research Council)
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Papers by Wonmin Son
Entropy
For the identification of non-trivial quantum phase, we exploit a Bell-type correlation that is a... more For the identification of non-trivial quantum phase, we exploit a Bell-type correlation that is applied to the one-dimensional spin-1 XXZ chain. It is found that our generalization of bipartite Bell correlation can take a decomposed form of transverse spin correlation together with high-order terms. The formulation of the density-matrix renormalisation group is utilized to obtain the ground state of a given Hamiltonian with non-trivial phase. Subsequently Bell-type correlation is evaluated through the analysis of the matrix product state. Diverse classes of quantum phase transitions in the spin-1 model are identified precisely through the evaluation of the first and the second moments of the generalized Bell correlations. The role of high-order terms in the criticality has been identified and their physical implications for the quantum phase have been revealed.
Physical Review A, 2007
We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magneti... more We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magnetic field, B l =B+e −iπl b . Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, ...
Physical Review A, 2007
We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magneti... more We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magnetic field, B l =B+e −iπl b . Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, ...
Entropy
For the identification of non-trivial quantum phase, we exploit a Bell-type correlation that is a... more For the identification of non-trivial quantum phase, we exploit a Bell-type correlation that is applied to the one-dimensional spin-1 XXZ chain. It is found that our generalization of bipartite Bell correlation can take a decomposed form of transverse spin correlation together with high-order terms. The formulation of the density-matrix renormalisation group is utilized to obtain the ground state of a given Hamiltonian with non-trivial phase. Subsequently Bell-type correlation is evaluated through the analysis of the matrix product state. Diverse classes of quantum phase transitions in the spin-1 model are identified precisely through the evaluation of the first and the second moments of the generalized Bell correlations. The role of high-order terms in the criticality has been identified and their physical implications for the quantum phase have been revealed.
Physical Review A, 2007
We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magneti... more We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magnetic field, B l =B+e −iπl b . Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, ...
Physical Review A, 2007
We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magneti... more We investigate macroscopic entanglement in an infinite XX spin-1 / 2 chain with staggered magnetic field, B l =B+e −iπl b . Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, ...