Observation of a non-Hermitian phase transition in an optical quantum gas

FE Öztürk, T Lappe, G Hellmann, J Schmitt, J Klaers… - Science, 2021‏ - science.org
Quantum gases of light, such as photon or polariton condensates in optical microcavities,
are collective quantum systems enabling a tailoring of dissipation from, for example, cavity …

Critical fluctuations in a confined driven-dissipative quantum condensate

H Alnatah, P Comaron, S Mukherjee… - Science …, 2024‏ - science.org
Phase fluctuations determine the low-energy properties of quantum condensates. However,
at the condensation threshold, both density and phase fluctuations are relevant. While …

Non-Markovian dynamics of open quantum systems via auxiliary particles with exact operator constraint

T Bode, M Kajan, F Meirinhos, J Kroha - Physical Review Research, 2024‏ - APS
We introduce an auxiliary-particle field theory to treat the non-Markovian dynamics of driven-
dissipative quantum systems of the Jaynes-Cummings type. It assigns an individual …

Non-stationary statistics and formation jitter in transient photon condensation

BT Walker, JD Rodrigues, HS Dhar, RF Oulton… - Nature …, 2020‏ - nature.com
While equilibrium phase transitions are easily described by order parameters and free-
energy landscapes, for their non-stationary counterparts these quantities are usually ill …

Photonic Bose-Einstein condensation in the continuum limit

A Erglis, M Radonjić, SY Buhmann - Physical Review Letters, 2024‏ - APS
We investigate the properties of the photon Bose-Einstein condensate in the limit of small
mode spacing. Alongside the well-known threshold of the phase transition at large mode …

Vortex-pair annihilation in arrays of photon cavities

VN Gladilin, M Wouters - Physical Review A, 2022‏ - APS
We investigate theoretically the evolution of the vortex number in an array of photon
condensates that is brought from an incoherent low-density state to a coherent high-density …

On the fluctuations of the number of atoms in the condensate

MB Kruk, P Kulik, MF Andersen, P Deuar… - arxiv preprint arxiv …, 2025‏ - arxiv.org
Bose-Einstein condensation represents a remarkable phase transition, characterized by the
formation of a single quantum subsystem. As a result, the statistical properties of the …

Non-markovian dynamics of open bose-einstein condensates

T Lappe - 2021‏ - bonndoc.ulb.uni-bonn.de
Quantum many-body systems coupling photonic and matter degrees of freedom are ideal for
the realization of driven open quantum dynamics at the intersection of quantum optics and …

Gaussian quantum trajectories for the variational simulation of open quantum systems with photonic applications

W Verstraelen - 2020‏ - repository.uantwerpen.be
Fysica is de wetenschap die de wereld tracht te beschrijven met fundamentele natuurwetten.
Voor heel kleine systemen weten we nu een eeuw dat deze wetten die van de …

Investigation of Paraxial Light Concentration and Homogeneously Trapped Two-Dimensional Optical Quantum Gases

E Busley - 2022‏ - bonndoc.ulb.uni-bonn.de
Trapped degenerate quantum gases in tailored environments allow for the investigation of
otherwise unaccessible microscopic phenomena as they appear eg for the electron gas …