Fermionic concurrence in the extended Hubbard dimer

Abstract

In this paper, we introduce and study the fermionic concurrence in a two-site extended Hubbard model. Its behaviors both at the ground state and finite temperatures as function of Coulomb interaction $U$ (on-site) and $V$ (nearest-neighbor) are obtained analytically and numerically. We also investigate the change of the concurrence under a nonuniform field, including local potential and magnetic field, and find that the concurrence can be modulated by these fields.

5 pages, 7 figures

References in corpus (15)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Separability Criterion for Density Matrices
• A computable measure of entanglement
• Entanglement of a Pair of Quantum Bits
• Entanglement in quantum critical phenomena
• Scaling of Entanglement close to a Quantum Phase Transitions
• Entanglement in a simple quantum phase transition
• Entanglement in the Quantum Heisenberg XY model
• Quantum Coherence in an Exchange-Coupled Dimer of Single-Molecule Magnets
• Quantum Entanglement in Fermionic Lattices
• Entangled Rings
• Concurrence of mixed bipartite quantum states in arbitrary dimensions
• Double-Occupancy Errors, Adiabaticity, and Entanglement of Spin-Qubits in Quantum Dots
• Fermionic entanglement in itinerant systems
• Macroscopic entanglement jumps in model spin systems

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• Spin frustration and fermionic entanglement in an exactly solved hybrid diamond chain with the localized Ising spins and mobile electrons
• Many-body entanglement in a topological chiral ladder
• Stability of electric-field-driven MBL in an interacting long range hopping model
• Entanglement and transport through correlated quantum dot
• Thermal entanglement of Hubbard dimers in the nonextensive statistics
• Quantum entanglement and transport in non-equilibrium interacting double-dot setup: The curious role of degeneracy