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Quantum effective action for the bosonic Josephson junction
Koichiro Furutani, Jacques Tempere, Luca Salasnich
We investigate a bosonic Josephson junction by using the path-integral formalism with relative phase and population imbalance as dynamical variables. We derive an effective only-ph…
Superfluid properties of bright solitons in a ring
Koichiro Furutani, Luca Salasnich
We theoretically investigate superfluid properties of a one-dimensional annular superfluid with a boost. We derive the formula of the superfluid fraction in the one-dimensional sup…
Acoustic plasmons in graphene sandwiched between two metallic slabs
Luca Salasnich
We study the effect of two metallic slabs on the collective dynamics of electrons in graphene positioned between the two slabs. We show that if the slabs are perfect conductors the…
Quantum and thermal fluctuations in the dynamics of a resistively and capacitively shunted Josephson junction
Koichiro Furutani, Luca Salasnich
We theoretically investigate the phase and voltage correlation dynamics, which includes both the deterministic contribution and stochastic fluctuations, under a current noise gener…
Dissipation and fluctuations in elongated bosonic Josephson junctions
F. Binanti, K. Furutani, L. Salasnich
We investigate the dynamics of bosonic atoms in elongated Josephson junctions. We find that these systems are characterized by an intrinsic coupling between the Josephson mode of m…
Topological superfluid transition in bubble-trapped condensates
Andrea Tononi, Axel Pelster, Luca Salasnich
Ultracold quantum gases are highly controllable and, thus, capable of simulating difficult quantum many-body problems ranging from condensed matter physics to astrophysics. Althoug…