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[HTML][HTML] Repulsive Fermi and Bose polarons in quantum gases
Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary
excitations of a many-particle background. In the field of ultracold atoms, the study of the …
excitations of a many-particle background. In the field of ultracold atoms, the study of the …
Bose polarons near quantum criticality
The emergence of quasiparticles in interacting matter represents one of the cornerstones of
modern physics. However, in the vicinity of a quantum critical point, the existence of …
modern physics. However, in the vicinity of a quantum critical point, the existence of …
Impurities and polarons in bosonic quantum gases: a review on recent progress
This review describes the field of Bose polarons, arising when mobile impurities are
immersed into a bosonic quantum gas. The latter can be realized by a Bose-Einstein …
immersed into a bosonic quantum gas. The latter can be realized by a Bose-Einstein …
Analyzing a Bose polaron across resonant interactions
Recently, two independent experiments reported the observation of long-lived polarons in a
Bose-Einstein condensate, providing an excellent setting to study the generic scenario of a …
Bose-Einstein condensate, providing an excellent setting to study the generic scenario of a …
Observation of a lee-huang-yang fluid
We observe monopole oscillations in a mixture of Bose-Einstein condensates, where the
usually dominant mean-field interactions are canceled. In this case, the system is governed …
usually dominant mean-field interactions are canceled. In this case, the system is governed …
Using polarons for sub-nk quantum nondemolition thermometry in a bose-einstein condensate
We introduce a novel minimally disturbing method for sub-nK thermometry in a Bose-
Einstein condensate (BEC). Our technique is based on the Bose polaron model; namely, an …
Einstein condensate (BEC). Our technique is based on the Bose polaron model; namely, an …
Mobile impurity in a Bose-Einstein condensate and the orthogonality catastrophe
We analyze the properties of an impurity in a dilute Bose-Einstein condensate (BEC). The
quasiparticle residue of a static impurity in an ideal BEC is known to vanish exponentially …
quasiparticle residue of a static impurity in an ideal BEC is known to vanish exponentially …
Theory of a resonantly interacting impurity in a Bose-Einstein condensate
We investigate a Bose-Einstein condensate in strong interaction with a single impurity
particle. While this situation has received considerable interest in recent years, the regime of …
particle. While this situation has received considerable interest in recent years, the regime of …
Bose polaron and the Efimov effect: A Gaussian-state approach
Since the Efimov effect was introduced, a detailed theoretical understanding of Efimov
physics has been developed in the few-body context. However, it has proven challenging to …
physics has been developed in the few-body context. However, it has proven challenging to …
Phase diagram for strong-coupling Bose polarons
Important properties of complex quantum many-body systems and their phase diagrams can
often already be inferred from the impurity limit. The Bose polaron problem describing an …
often already be inferred from the impurity limit. The Bose polaron problem describing an …