Linear Interactions

Symeon Grivopoulos, Ian R. Petersen

A number of recent works employ bilinear Hamiltonian interactions between Linear Quantum Stochastic Systems (LQSSs). Contrary to naturally occurring Hamiltonian interactions between physical systems, such interactions must be engineered. In this work, we propose a simple model for the implementation of an arbitrary bilinear interaction between two given LQSSs via a feedback interconnection.

Heinrich Saller

Sang-jin Sin A, Yili Wang

Recent studies have shown that a spatially random Yukawa-type interaction between a Fermi surface and critical bosons can produce linear-in-temperature resistivity, the defining signature of strange metals. In this article, we systematically classify all scalar couplings of the form $(ψ^{\dagger}ψ)^nϕ^m$ in arbitrary dimensions to identify possible candidates for strange-metal behaviour within this disordered framework. We find that only spatially random Yukawa-type interaction in $(2+1)$ dimensions can yield linear resistivity. This indicates that linear resistivity is not a universal property of all spatially random scalar coupling, and strange-metal property replies on both dimensions and interaction type.

Dimitri R. Yafaev

Liron Stern, Boris Desiatov, Noa Mazurski +1 more

We present and experimentally demonstrate an ultra-compact and efficient apparatus for chips-scale linear and non-linear light vapor interactions, based on an atomic cladding nano-scale waveguides. Both low power saturation, and Autler-Townes splitting are observed.