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8 papers · 2 filters
Higher-order effective interactions for bosons near a two-body zero crossing
A. Pricoupenko, D. S. Petrov
We develop the perturbation theory for bosons interacting via a two-body potential of vanishing mean value. We find that the leading nonpairwise contribution to the energy emer…
Strong correlations in lossy one-dimensional quantum gases: from the quantum Zeno effect to the generalized Gibbs ensemble
Davide Rossini, Alexis Ghermaoui, Manel Bosch Aguilera +5
We consider strong two-body losses in bosonic gases trapped in one-dimensional optical lattices. We exploit the separation of time scales typical of a system in the many-body quant…
Mixed bubbles in Bose-Bose mixtures
P. Naidon, D. S. Petrov
Repulsive Bose-Bose mixtures are known to either mix or phase-separate into pure components. Here we predict a mixed-bubble regime in which bubbles of the mixed phase coexist with…
Emergence of a sharp quantum collective mode in a one-dimensional Fermi polaron
Pavel E. Dolgirev, Yi-Fan Qu, Mikhail B. Zvonarev +2
The Fermi-polaron problem of a mobile impurity interacting with fermionic medium emerges in various contexts, ranging from the foundations of Landau's Fermi-liquid theory to electr…
Supersolidity of cnoidal waves in an ultracold Bose gas
Giovanni I. Martone, Alessio Recati, Nicolas Pavloff
A one-dimensional Bose-Einstein condensate may experience nonlinear periodic modulations known as "cnoidal waves". We argue that such structures represent promising candidates for…
Pairing in spin chains and spinless fermions with next-nearest neighbour interactions
Lorenzo Gotta, Leonardo Mazza, Pascal Simon +1
We investigate the phase diagrams of a one-dimensional lattice model of fermions and of a spin chain with interactions extending up to next-nearest neighbour range. In particular,…