Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Zillich, Robert E."'
Publikováno v:
Phys. Rev. Research 6, 023137 (2024)
We investigate self-localization of a polaron in a homogeneous Bose-Einstein condensate in one dimension. This effect, where an impurity is trapped by the deformation that it causes in the surrounding Bose gas, has been first predicted by mean field
Externí odkaz:
http://arxiv.org/abs/2312.11235
Autor:
Kranabetter, Lorenz, Kristensen, Henrik H., Ghazaryan, Areg, Schouder, Constant A., Chatterley, Adam S., Janssen, Paul, Jensen, Frank, Zillich, Robert E., Lemeshko, Mikhail, Stapelfeldt, Henrik
Publikováno v:
Phys. Rev. Lett. 131, 053201 (2023)
We demonstrate that a sodium dimer, Na$_{2}$($1^3\Sigma_{u}^+$), residing on the surface of a helium nanodroplet, can be set into rotation by a nonresonant 1.0 ps infrared laser pulse. The time-dependent degree of alignment measured, exhibits a perio
Externí odkaz:
http://arxiv.org/abs/2308.15247
Autor:
Ortmayer, Helmut, Zillich, Robert E.
Publikováno v:
Phys. Rev. E 109, 065104 (2024)
A Laval nozzle can accelerate expanding gas above supersonic velocities, while cooling the gas in the process. This work investigates this process for microscopic Laval nozzles by means of non-equilibrium molecular dynamics simulations of statioary f
Externí odkaz:
http://arxiv.org/abs/2306.17641
Autor:
Gartner, Mathias, Miesbauer, David, Kobler, Michael, Freund, Julia, Carleo, Giuseppe, Zillich, Robert E.
We present a new variational method to study the dynamics of a closed bosonic many-body system, the time-dependent hypernetted-chain Euler-Lagrange method, tHNC . Based on the Jastrow ansatz, it accounts for quantum fluctuations in a non-perturbative
Externí odkaz:
http://arxiv.org/abs/2212.07113
Publikováno v:
Phys. Rev. A 108, 033303 (2023)
We investigate the phases of a Bose-Einstein condensate of dipolar atoms restricted to move in a two-dimensional plane. The dipole moments are all aligned in a direction tilted with respect to the plane normal. As a result of the attractive and repul
Externí odkaz:
http://arxiv.org/abs/2208.05028
Time-dependent variational Monte Carlo study of the dynamic response of bosons in an optical lattice
Publikováno v:
SciPost Phys. 13, 025 (2022)
We study the dynamics of a one-dimensional Bose gas at unit filling in both shallow and deep optical lattices and obtain the dynamic structure factor ${S(k,\omega)}$ by monitoring the linear response to a weak probe pulse. We introduce a new procedur
Externí odkaz:
http://arxiv.org/abs/2202.07535
Autor:
Chatterley, Adam S., Christiansen, Lars, Schouder, Constant A., Jørgensen, Anders V., Shepperson, Benjamin, Cherepanov, Igor N., Bighin, Giacomo, Zillich, Robert E., Lemeshko, Mikhail, Stapelfeldt, Henrik
Alignment of OCS, CS$_2$ and I$_2$ molecules embedded in helium nanodroplets is measured as a function of time following rotational excitation by a non-resonant, comparatively weak ps laser pulse. The distinct peaks in the power spectra, obtained by
Externí odkaz:
http://arxiv.org/abs/2006.02694
Publikováno v:
Phys. Rev. A 101, 013628 (2020)
We investigate the ground-state properties and excitations of Rydberg-dressed bosons in both three and two dimensions, using the hypernetted-chain Euler-Lagrange approximation, which accounts for correlations and thus goes beyond the mean field appro
Externí odkaz:
http://arxiv.org/abs/1905.01643
Akademický článek
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Publikováno v:
Phys. Rev. A 98, 023633 (2018)
Recent experiments confirmed that fluctuations beyond the mean-field approximation can lead to self-bound liquid droplets of ultra-dilute binary Bose mixtures. We proceed beyond the beyond-mean-field approximation, and study liquid Bose mixtures usin
Externí odkaz:
http://arxiv.org/abs/1805.06200