Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Zwerger W"'
Autor:
Kwon, W. J., Del Pace, G., Panza, R., Inguscio, M., Zwerger, W., Zaccanti, M., Scazza, F., Roati, G.
Publikováno v:
Science 369, 84-88 (2020)
The dc Josephson effect provides a powerful phase-sensitive tool for investigating superfluid order parameters. We report on the observation of dc Josephson supercurrents in strongly interacting fermionic superfluids across a tunnelling barrier in th
Externí odkaz:
http://arxiv.org/abs/1908.09696
Autor:
Steinacher, R., Pöltl, C., Krähenmann, T., Hofmann, A., Reichl, C., Zwerger, W., Wegscheider, W., Jalabert, R. A., Ensslin, K., Weinmann, D., Ihn, T.
Publikováno v:
Phys. Rev. B 98, 075426 (2018)
An open resonator fabricated in a two-dimensional electron gas is used to explore the transition from strongly invasive scanning gate microscopy to the perturbative regime of weak tip-induced potentials. With the help of numerical simulations that fa
Externí odkaz:
http://arxiv.org/abs/1709.08559
Autor:
Zwerger, W.
Publikováno v:
Proceedings of the International School of Physics "Enrico Fermi" - Course 191 "Quantum Matter at Ultralow Temperatures" edited by M. Inguscio, W. Ketterle, S. Stringari and G. Roati (IOS Press, Amsterdam; SIF Bologna) 2016, pp. 63-142
The experimental realization of stable, ultracold Fermi gases near a Feshbach resonance allows to study gases with attractive interactions of essentially arbitrary strength. They extend the classic paradigm of BCS into a regime which has never been a
Externí odkaz:
http://arxiv.org/abs/1608.00457
Autor:
Weidinger, S. A., Zwerger, W.
Publikováno v:
Eur. Phys. J. B (2015) 88 237
We present a theory for Raman scattering on 2D quantum antiferromagnets. The microscopic Fleury-Loudon Hamiltonian is expressed in terms of an effective $O(3)$ - model. Well within the N\'eel ordered phase, the Raman spectrum contains a two-magnon an
Externí odkaz:
http://arxiv.org/abs/1502.01857
Publikováno v:
New J. Phys. 14, 115003 (2012)
We propose a framework for inducing strong optomechanical effects in a suspended carbon nanotube based on deformation potential exciton-phonon coupling. The excitons are confined using an inhomogeneous axial electric field which generates optically a
Externí odkaz:
http://arxiv.org/abs/0911.1330
Publikováno v:
Phys. Rev. A 81, 023629 (2010)
We present a numerical study of the one-dimensional BCS-BEC crossover of a spin-imbalanced Fermi gas. The crossover is described by the Bose-Fermi resonance model in a real space representation. Our main interest is in the behavior of the pair correl
Externí odkaz:
http://arxiv.org/abs/0908.3074
Publikováno v:
Phys. Rev. A 80, 053605 (2009)
A single down spin Fermion with an attractive, zero range interaction with a Fermi sea of up-spin Fermions forms a polaronic quasiparticle. The associated quasiparticle weight vanishes beyond a critical strength of the attractive interaction, where a
Externí odkaz:
http://arxiv.org/abs/0908.1343
Publikováno v:
Phys. Rev. A 80, 063612 (2009)
We present a calculation of the spectral functions and the associated rf response of ultracold fermionic atoms near a Feshbach resonance. The single particle spectra are peaked at energies that can be modeled by a modified BCS dispersion. However, ev
Externí odkaz:
http://arxiv.org/abs/0904.1333
Autor:
Haussmann, R., Zwerger, W.
Publikováno v:
Phys. Rev. A 78, 063602 (2008)
Thermodynamic properties of an ultracold Fermi gas in a harmonic trap are calculated within a local density approximation, using a conserving many-body formalism for the BCS to BEC crossover problem, which has been developed by Haussmann et al. [Phys
Externí odkaz:
http://arxiv.org/abs/0805.3226
Publikováno v:
New J. Phys.10, 095007 (2008).
We analyze the quantum regime of the dynamical backaction cooling of a mechanical resonator assisted by a driven harmonic oscillator (cavity). Our treatment applies to both optomechanical and electromechanical realizations and includes the effect of
Externí odkaz:
http://arxiv.org/abs/0805.1431