Search Results - "Bruun, M"

Impurity in a Bose-Einstein Condensate and the Efimov Effect by Levinsen, Jesper, Parish, Meera M, Bruun, Georg M

“…We investigate the zero-temperature properties of an impurity particle interacting with a Bose-Einstein condensate (BEC), using a variational wave function…”
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Quasiparticle Properties of a Mobile Impurity in a Bose-Einstein Condensate by Christensen, Rasmus Søgaard, Levinsen, Jesper, Bruun, Georg M

“…We develop a systematic perturbation theory for the quasiparticle properties of a single impurity immersed in a Bose-Einstein condensate. Analytical results…”
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Landau Effective Interaction between Quasiparticles in a Bose-Einstein Condensate by Camacho-Guardian, A., Bruun, Georg M.

“…Landau’s description of the excitations in a macroscopic system in terms of quasiparticles stands out as one of the highlights in quantum physics. It provides…”
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Metastability and coherence of repulsive polarons in a strongly interacting Fermi mixture by Kohstall, C., Zaccanti, M., Jag, M., Trenkwalder, A., Massignan, P., Bruun, G. M., Schreck, F., Grimm, R.

“…Radio-frequency spectroscopy is used to identify a long-lived, metastable quasiparticle in a lithium–potassium Fermi mixture with strongly repulsive…”
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Topological Superfluid in a Fermi-Bose Mixture with a High Critical Temperature by Wu, Zhigang, Bruun, G M

“…We show that a 2D spin-polarized Fermi gas immersed in a 3D Bose-Einstein condensate constitutes a very promising system for realizing a p_{x}+ip_{y}…”
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Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate by Jørgensen, Nils B, Wacker, Lars, Skalmstang, Kristoffer T, Parish, Meera M, Levinsen, Jesper, Christensen, Rasmus S, Bruun, Georg M, Arlt, Jan J

“…The problem of an impurity particle moving through a bosonic medium plays a fundamental role in physics. However, the canonical scenario of a mobile impurity…”
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Bose Polarons at Finite Temperature and Strong Coupling by Guenther, Nils-Eric, Massignan, Pietro, Lewenstein, Maciej, Bruun, Georg M

“…A mobile impurity coupled to a weakly interacting Bose gas, a Bose polaron, displays several interesting effects. While a single attractive quasiparticle is…”
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Bipolarons in a Bose-Einstein Condensate by Camacho-Guardian, A, Peña Ardila, L A, Pohl, T, Bruun, G M

“…Mobile impurities in a Bose-Einstein condensate form quasiparticles called polarons. Here, we show that two such polarons can bind to form a bound bipolaron…”
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Nonequilibrium Hole Dynamics in Antiferromagnets: Damped Strings and Polarons by Nielsen, K Knakkergaard, Pohl, T, Bruun, G M

“…We develop a nonperturbative theory for hole dynamics in antiferromagnetic spin lattices, as described by the t-J model. This is achieved by generalizing the…”
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Excitation Spectrum and Superfluid Gap of an Ultracold Fermi Gas by Biss, Hauke, Sobirey, Lennart, Luick, Niclas, Bohlen, Markus, Kinnunen, Jami J, Bruun, Georg M, Lompe, Thomas, Moritz, Henning

“…Ultracold atomic gases are a powerful tool to experimentally study strongly correlated quantum many-body systems. In particular, ultracold Fermi gases with…”
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Mediated Interaction between Ions in Quantum Degenerate Gases by Ding, Shanshan, Drewsen, Michael, Arlt, Jan J., Bruun, G. M.

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Decoherence of Impurities in a Fermi Sea of Ultracold Atoms by Cetina, Marko, Jag, Michael, Lous, Rianne S, Walraven, Jook T M, Grimm, Rudolf, Christensen, Rasmus S, Bruun, Georg M

“…We investigate the decoherence of ^{40}K impurities interacting with a three-dimensional Fermi sea of ^{6}Li across an interspecies Feshbach resonance. The…”
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Critical slowdown of non-equilibrium polaron dynamics by Nielsen, K Knakkergaard, Ardila, L A Peña, Bruun, G M, Pohl, T

“…We study the quantum dynamics of a single impurity following its sudden immersion into a Bose-Einstein condensate. The ensuing formation of the Bose polaron in…”
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Mediated Interactions and Photon Bound States in an Exciton-Polariton Mixture by Camacho-Guardian, A, Bastarrachea-Magnani, M A, Bruun, G M

“…The quest to realize strongly interacting photons remains an outstanding challenge both for fundamental science and for applications. Here, we explore mediated…”
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Few-Body Precursor of the Higgs Mode in a Fermi Gas by Bjerlin, J, Reimann, S M, Bruun, G M

“…We demonstrate that an undamped few-body precursor of the Higgs mode can be investigated in a harmonically trapped Fermi gas. Using exact diagonalization, the…”
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Itinerant ferromagnetism in a polarized two-component Fermi gas by Massignan, Pietro, Yu, Zhenhua, Bruun, Georg M

“…We analyze when a repulsively interacting two-component Fermi gas becomes thermodynamically unstable against phase separation. We focus on the strongly…”
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Circulating C-reactive protein levels as a prognostic biomarker in breast cancer across body mass index groups by Holm, J. B., Baggesen, E., Cronin-Fenton, D., Frystyk, J., Bruun, J. M., Christiansen, P., Borgquist, S.

“…Obesity and systemic inflammation are associated with breast cancer (BC) outcomes. Systemic inflammation is increased in obesity. We examined the association…”
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Shear viscosity and spin-diffusion coefficient of a two-dimensional Fermi gas by Bruun, G. M.

“…Using kinetic theory, we calculate the shear viscosity and the spin-diffusion coefficient as well as the associated relaxation times for a two-component Fermi…”
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Exercise training versus diet-induced weight-loss on metabolic risk factors and inflammatory markers in obese subjects: a 12-week randomized intervention study by Christiansen, Tore, Paulsen, Søren K, Bruun, Jens M, Pedersen, Steen B, Richelsen, Bjørn

“…The purpose of this study was to investigate the effect of exercise training and diet-induced weight loss alone or in combination on inflammatory markers in…”
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Monocyte chemoattractant protein-1 is produced in isolated adipocytes, associated with adiposity and reduced after weight loss in morbid obese subjects by CHRISTIANSEN, T, RICHELSEN, B, BRUUN, J. M

“…Obesity is associated with insulin resistance and premature atherosclerosis. The human adipose tissue produce several adipokines including monocyte…”
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