Thermal entanglement witness for materials with variable local spin lengths
arXiv:0907.1068 · doi:10.1103/PhysRevA.79.052337
Abstract
We show that the thermal entanglement in a spin system using only magnetic susceptibility measurements is restricted to the insulator materials. We develop a generalization of the thermal entanglement witness that allows us to get information about the system entanglement with variable local spin lengths that can be used experimentally in conductor or insulator materials. As an application, we study thermal entanglement for the half-filled Hubbard model for linear, square and cubic clusters. We note that it is the itinerancy of electrons that favors the entanglement. Our results suggest a weak dependence between entanglement and external spin freedom degrees.
4 pages, 3 figures
References in corpus (19)
- Quantum Entanglement in Fermionic Lattices
- Entanglement and quantum phase transition in the extended Hubbard model
- Local entanglement and quantum phase transition in the Hubbard model
- Violation of local uncertainty relations as a signature of entanglement
- The entanglement of indistinguishable particles shared between two parties
- General criterion for the entanglement of two indistinguishable particles
- Magnetic Susceptibility as a Macrosopic Entaglement Witness
- Entanglement of Formation of Bipartite Quantum States
- Crucial Role of Quantum Entanglement in Bulk Properties of Solids
- Entanglement Scaling in the One-Dimensional Hubbard Model at Criticality
- Entanglement of indistinguishable particles in condensed matter physics
- Experimental Determination of Thermal Entanglement in Spin Clusters using Magnetic Susceptibility Measurements
- Single-Site Entanglement of Fermions at a Quantum Phase Transition
- Algorithmic complexity and entanglement of quantum states
- Thermal entanglement properties of small spin clusters
- Thermal entanglement in the nanotubular system Na_2V_3O_7
- Entanglement in extended Hubbard models and quantum phase transitions
- Entangled Quantum States Generated by Shor's Factoring Algorithm
- Global Entanglement for Multipartite Quantum States
Cited by in corpus (7)
- Induced effects of the Dzyaloshinskii-Moriya interaction on the thermal entanglement in spin-1/2 Heisenberg chains
- Entanglement temperature in molecular magnets composed of S-spin dimers
- Evidence for entanglement at high temperatures in an engineered molecular magnet
- Design and Experimental Performance of Local Entanglement Witness Operators
- Entanglement from density measurements: analytical density-functional for the entanglement of strongly correlated fermions
- Quantum correlations in the 1D spin-1/2 Ising model with added Dzyaloshinskii-Moriya interaction
- Thermal entanglement of Hubbard dimers in the nonextensive statistics