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most citedGeneral equilibrium second-order hydrodynamic coefficients for free quantum fields

70 citations

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cond-mat.quant-gas2026

A Maxwell Fish-Eye Lens in a Bose-Einstein Condensate

Jelte Duchêne, Elinor Kath, Floriane Arrouas +7

We experimentally realize an analogue of the optical Maxwell fish-eye lens (MFEL) using phononic excitations in a Bose-Einstein condensate (BEC). A MFEL is characterized by a radia…

cond-mat.quant-gas2026

Few is different: deciphering many-body dynamics in mesoscopic quantum gases

Juergen Berges, Sandra Brandstetter, Jasmine Brewer +27

Emergent macroscopic descriptions of matter, such as hydrodynamics, are central to our description of complex physical systems across a wide spectrum of energy scales. The conventi…

cond-mat.quant-gas2026

Probing Bardeen-Cooper-Schrieffer pairing and quasiparticle formation in ultracold gases by Rydberg atom spectroscopy

Emilio Ramos Rodríguez, Marcel Gievers, Richard Schmidt

Locally probing pairing in fermionic superfluids, ranging from micro- to macroscopic scales, has been a long-standing challenge. Here, we investigate a new approach that uses Rydbe…

cond-mat.quant-gas2026

Decaying superfluid turbulence near an anomalous non-thermal fixed point

Niklas Rasch, Thomas Gasenzer

We investigate anomalously slow coarsening in a dilute two-dimensional (2d) superfluid closed with respect to particle and energy exchange with the environment. The dynamics is dem…

cond-mat.quant-gas20262 cited

Role of impurity statistics and medium constraints in polaron-polaron interactions

Jesper Levinsen, Francesca Maria Marchetti, Olivier Bleu +1

We consider the behavior of a small density of mobile impurities (polarons) immersed in a quantum gas, a generic scenario that can be realized in cold atomic gases, liquid helium m…

cond-mat.quant-gas2026

Observation of sine-Gordon-like solitons in a spinor Bose-Einstein condensate

Yannick Deller, Alexander Schmutz, Raphael Schäfer +7

We experimentally generate sine-Gordon-like solitons in a spin-1 spinor Bose-Einstein condensate (BEC) utilizing a robust and reproducible local phase-imprinting scheme. We find th…