6533b7cefe1ef96bd125727e
RESEARCH PRODUCT
Ground-state fidelity and bipartite entanglement in the Bose-Hubbard model.
Alessandro VezzaniPierfrancesco Buonsantesubject
Quantum phase transitionPhysicsQuantum PhysicsHubbard modelFOS: Physical sciencesGeneral Physics and AstronomyQuantum entanglementBose–Hubbard modelSquashed entanglementMultipartite entanglementCondensed Matter - Other Condensed MatterQuantum mechanicsQuantum critical pointQuantum informationQuantum Physics (quant-ph)Other Condensed Matter (cond-mat.other)description
We analyze the quantum phase transition in the Bose-Hubbard model borrowing two tools from quantum-information theory, i.e. the ground-state fidelity and entanglement measures. We consider systems at unitary filling comprising up to 50 sites and show for the first time that a finite-size scaling analysis of these quantities provides excellent estimates for the quantum critical point.We conclude that fidelity is particularly suited for revealing a quantum phase transition and pinning down the critical point thereof, while the success of entanglement measures depends on the mechanisms governing the transition.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-03-16 | Physical review letters |