Options
Nonclassical states in strongly correlated bosonic ring ladders
Citation
Victorin, N., Haug, T., Kwek, L.-C., Amico, L., & Minguzzi, A. (2019). Nonclassical states in strongly correlated bosonic ring ladders. Physical Review A, 99, Article 033616. https://doi.org/10.1103/PhysRevA.99.033616
Abstract
We study the ground state of a bosonic ring ladder under a gauge flux in the vortex phase, corresponding to the case where the single-particle dispersion relation has two degenerate minima. By combining exact diagonalization and an approximate fermionization approach we show that the ground state of the system evolves from a fragmented state of two single-particle states at weak interparticle interactions to a fragmented state of two Fermi seas at large interactions. Fragmentation is inferred from the study of the eigenvalues of the reduced single-particle density matrix as well as from the calculation of the fidelity of the states. We characterize these nonclassical states by the momentum distribution, the chiral currents, and the current-current correlations.
Date Issued
2019
Publisher
American Physical Society
Journal
Physical Review A