Ground-State Fidelity and Bipartite Entanglement in the Bose-Hubbard Model
Ground-State Fidelity and Bipartite Entanglement in the Bose-Hubbard Model
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 …