9 papers
Green's Function Methods for Computing Supercurrents in Josephson Junctions
Eduardo R. Mucciolo, Jouko Nieminen, Xiao Xiao +3
Interest in Josephson junctions (JJs) has increased rapidly in recent years not only because of their use in qubits and other quantum devices but also due to the unique physics sup…
Universal tuning of quantum electrodynamic interactions from power laws to exponential screening and logarithmic antiscreening
Michael N. Leuenberger, Daniel Gunlycke
We introduce a material-agnostic platform for \emph{universal tuning of quantum electrodynamic interactions from power laws to exponential screening and logarithmic antiscreening},…
Tunable giant Purcell enhancement of quantum light emitters by means of acoustic graphene plasmons
Justin Gruber, Mahtab A. Khan, Dirk R. Englund +1
Inspired by the remarkable ability of plasmons to boost radiative emission rates, we propose leveraging acoustic graphene plasmons (AGPs) to realize tunable, giant Purcell enhancem…
On-chip high-order parametric downconversion in the excitonic Mott insulator NbCl for programmable multiphoton entangled states
Dmitry Skachkov, Dirk R. Englund, Michael N. Leuenberger
Spontaneous parametric downconversion (SPDC) and four-wave mixing in and media underpin most entangled-photon sources, but direct generation of higher-order e…
Emergent Superfluidity of Hard-Core Excitons in Single-Layer Breathing-Kagome NbTeCl
Mahtab A. Khan, Michael N. Leuenberger
We develop a microscopic theory of superfluidity for hard-core dark excitons on the triangular lattice by mapping the large- Bose--Hubbard model to an effective XXZ spin-$\frac{…
Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material NbCl
Mahtab A. Khan, Naseem Ud Din, Dmitry Skachkov +2
Flat electronic bands strongly enhance Coulomb interactions and can stabilize unconventional insulating states. Motivated by the recent discovery of flat bands in breathing Kagome…