Interaction-induced directed transport in quantum chaotic subsystems

S Paul, JB Kannan, MS Santhanam - Physical Review E, 2023 - APS
Quantum directed transport can be realized in noninteracting, deterministic, chaotic systems
by appropriately breaking the spatiotemporal symmetries in the potential. In this work, the …

Loss-induced violation of the fundamental transmittance-asymmetry bound in nonlinear complex wave systems

CZ Wang, R Kononchuk, U Kuhl, T Kottos - Physical Review Letters, 2023 - APS
Nonlinearity-induced asymmetric transport (AT) can be utilized for on-chip implementation of
nonreciprocal devices that do not require odd-vector biasing. This scheme, however, is …

Distributions of the Wigner reaction matrix for microwave networks with symplectic symmetry in the presence of absorption

M Ławniczak, A Akhshani, O Farooq, M Białous… - Physical Review E, 2023 - APS
We report on experimental studies of the distribution of the reflection coefficients, and the
imaginary and real parts of Wigner's reaction (K) matrix employing open microwave …

Coupled unidirectional chaotic microwave graphs

O Farooq, A Akhshani, M Ławniczak, M Białous, L Sirko - Physical Review E, 2024 - APS
We experimentally investigate the undirected open microwave network Γ with internal
absorption composed of two coupled directed halves, unidirectional networks Γ+ and Γ …

Closed and open superconducting microwave waveguide networks as a model for quantum graphs

B Dietz, T Klaus, M Masi, M Miski-Oglu, A Richter… - Physical Review E, 2024 - APS
We report on high-precision measurements that were performed with superconducting
waveguide networks with the geometry of a tetrahedral and a honeycomb graph. They …

Superuniversal Statistics of Complex Time-Delays in Non-Hermitian Scattering Systems

N Shaibe, JM Erb, SM Anlage - arXiv preprint arXiv:2408.05343, 2024 - arxiv.org
The Wigner-Smith time-delay of flux conserving systems is a real quantity that measures
how long an excitation resides in an interaction region. The complex generalization of time …

Poles and zeros of the scattering matrix and coherent perfect absorption in tunable reverberating environments

J Lu - 2024 - theses.hal.science
In the thesis, I present experimental results on microwave networks and reverberation
chambers. The general description is based on scattering theory, describing the reflection …