Non-hermitian physics

Y Ashida, Z Gong, M Ueda - Advances in Physics, 2020 - Taylor & Francis
A review is given on the foundations and applications of non-Hermitian classical and
quantum physics. First, key theorems and central concepts in non-Hermitian linear algebra …

Roadmap on Atomtronics: State of the art and perspective

L Amico, M Boshier, G Birkl, A Minguzzi… - AVS Quantum …, 2021 - pubs.aip.org
Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through
magnetic or laser-generated guides with different shapes and intensities. In this way, new …

Colloquium: Atomtronic circuits: From many-body physics to quantum technologies

L Amico, D Anderson, M Boshier, JP Brantut… - Reviews of Modern …, 2022 - APS
Atomtronics is an emerging field that aims to manipulate ultracold atom moving in matter-
wave circuits for fundamental studies in both quantum science and technological …

Superfluid signatures in a dissipative quantum point contact

MZ Huang, J Mohan, AM Visuri, P Fabritius, M Talebi… - Physical Review Letters, 2023 - APS
We measure superfluid transport of strongly interacting fermionic lithium atoms through a
quantum point contact with local, spin-dependent particle loss. We observe that the …

PT-symmetric non-Hermitian quantum many-body system using ultracold atoms in an optical lattice with controlled dissipation

Y Takasu, T Yagami, Y Ashida… - … of Theoretical and …, 2020 - academic.oup.com
We report our realization of a parity–time (PT)-symmetric non-Hermitian many-body system
using cold atoms with dissipation. After developing a theoretical framework on PT-symmetric …

Universality in driven open quantum matter

LM Sieberer, M Buchhold, J Marino, S Diehl - arXiv preprint arXiv …, 2023 - arxiv.org
Universality is a powerful concept, which enables making qualitative and quantitative
predictions in systems with extensively many degrees of freedom. It finds realizations in …

Ultracold quantum wires with localized losses: Many-body quantum Zeno effect

H Fröml, C Muckel, C Kollath, A Chiocchetta, S Diehl - Physical Review B, 2020 - APS
We study a one-dimensional system of interacting spinless fermions subject to a localized
loss, where the interplay of gapless quantum fluctuations and particle interactions leads to …

Nonlinear transport in the presence of a local dissipation

AM Visuri, T Giamarchi, C Kollath - Physical Review Research, 2023 - APS
We characterize the particle transport, particle loss, and nonequilibrium steady states in a
dissipative one-dimensional lattice connected to reservoirs at both ends. The free-fermion …

Non-Gaussian correlations imprinted by local dephasing in fermionic wires

PE Dolgirev, J Marino, D Sels, E Demler - Physical Review B, 2020 - APS
We study the behavior of an extended fermionic wire coupled to a local stochastic field.
Since the quantum jump operator is Hermitian and quadratic in fermionic operators, it …

Quantized conductance through a spin-selective atomic point contact

M Lebrat, S Häusler, P Fabritius, D Husmann… - Physical review …, 2019 - APS
We implement a microscopic spin filter for cold fermionic atoms in a quantum point contact
(QPC) and create fully spin-polarized currents while retaining conductance quantization …