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Condensation phenomena in plasmonics
J. -P. Martikainen, M. O. J. Heikkinen, P. Törmä
We study arrays of plasmonic nanoparticles combined with quantum emitters, quantum plasmonic lattices, as a platform for room temperature studies of quantum many-body physics. We o…
Superfluidity and Density Order in a Bilayer Extended Hubbard Model
Tuomas I. Vanhala, Jildou E. Baarsma, Miikka O. J. Heikkinen +3
We use cluster dynamical mean field theory to study the phase diagram of the square lattice bilayer Hubbard model with an interlayer interaction. The layers are populated by two-co…
Topological States with Broken Translational and Time-Reversal Symmetries in a Honeycomb-Triangular Lattice
R. Sarjonen, P. Törmä
We study fermions in a lattice, with on-site and nearest neighbor attractive interactions between two spin species. We consider two geometries: both spins in a triangular lattice,…
Strong coupling between surface plasmon polaritons and emitters
P. Törmä, W. L. Barnes
In this review we look at the concepts and state-of-the-art concerning the strong coupling of surface plasmon-polariton modes to states associated with quantum emitters such as exc…
Spatial Coherence Properties of Organic Molecules Coupled to Plasmonic Surface Lattice Resonances in the Weak and Strong Coupling Regimes
L. Shi, T. K. Hakala, H. T. Rekola +3
We study spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with a fluorescent organic molecule (DiD) film. The evolution of spatial c…
Non-local quantum fluctuations and fermionic superfluidity in the imbalanced attractive Hubbard model
M. O. J. Heikkinen, D. -H. Kim, M. Troyer +1
We study fermionic superfluidity in strongly anisotropic optical lattices with attractive interactions utilizing the cluster DMFT method, and focusing in particular on the role of…
One-dimensional Fermi polaron in a combined harmonic and periodic potential
Elmer V. H. Doggen, Anna Korolyuk, Päivi Törmä +1
We study an impurity in a one-dimensional potential consisting of a harmonic and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational an…