Author pages are created from data sourced from our academic publisher partnerships and public sources.

Publications Influence

Share This Author

Superfluidity in topologically nontrivial flat bands

TLDR

Effective theory and emergent SU(2) symmetry in the flat bands of attractive Hubbard models

- M. Tovmasyan, S. Peotta, P. Torma, S. Huber
- Physics
- 2 August 2016

In a partially filled flat Bloch band electrons do not have a well defined Fermi surface and hence the low-energy theory is not a Fermi liquid. Neverethless, under the influence of an attractive… Expand

Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band.

- A. Julku, S. Peotta, T. Vanhala, Dong-Hee Kim, P. Törmä
- PhysicsPhysical review letters
- 10 March 2016

TLDR

Quantum metric and effective mass of a two-body bound state in a flat band

- P. Torma, Long Liang, S. Peotta
- PhysicsPhysical Review B
- 23 October 2018

We consider two-body bound states in a flat band of a multiband system. The existence of pair dispersion predicts the possibility of breaking the degeneracy of the band and creating order, such as… Expand

Band geometry, Berry curvature and superfluid weight

- Long Liang, T. Vanhala, S. Peotta, T. Siro, A. Harju, P. Torma
- Physics
- 6 October 2016

We present a theory of the superfluid weight in multiband attractive Hubbard models within the Bardeen-Cooper-Schrieffer (BCS) mean-field framework. We show how to separate the geometric contribution… Expand

Superconducting Memristors

In his original work Josephson predicted that a phase-dependent conductance should be present in superconducting tunnel junctions, an effect difficult to detect, mainly because it is hard to single… Expand

Quantum transport in ultracold atoms

Ultracold atoms confined by engineered magnetic or optical potentials are ideal to study phenomena otherwise difficult to realize or probe in the solid state, thanks to the ability to control the… Expand

Preformed pairs in flat Bloch bands

- M. Tovmasyan, S. Peotta, Long Liang, P. Torma, S. Huber
- PhysicsPhysical Review B
- 11 May 2018

In a flat Bloch band the kinetic energy is quenched and single particles cannot propagate since they are localized due to destructive interference. Whether this remains true in the presence of… Expand

Wave packet dynamics of Bogoliubov quasiparticles: quantum metric effects

- Long Liang, S. Peotta, A. Harju, P. Torma
- Physics
- 12 May 2017

We study the dynamics of the Bogoliubov wave packet in superconductors and calculate the supercurrent carried by the wave packet. We discover an anomalous contribution to the supercurrent, related to… Expand

Quantum shock waves and population inversion in collisions of ultracold atomic clouds

Using Time-Dependent Density Matrix Renormalization Group (TDMRG) we study the collision of one-dimensional atomic clouds confined in a harmonic trap and evolving with the Lieb-Liniger Hamiltonian.… Expand

...

1

2

3

4

...