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We study the ground state of few bosons with repulsive dipole-dipole interaction in a quasi-one-dimensional harmonic trap by means of the exact diagonalization method. Up to three interaction regimes are found depending on the strength of…

量子气体 · 物理学 2013-03-19 Frank Deuretzbacher , Jonas C. Cremon , Stephanie M. Reimann

We investigate the phase diagram of a dimerized Bose-Hubbard model, using density matrix renormalization group technique. We find a new phase, which is the coexistence of superfluid and bond-wave phases, due to the effect of dimerization.…

量子气体 · 物理学 2009-11-13 Anasuya Kundu , Swapan K Pat

We consider a bilayer setup with two parallel planes of cold fermionic polar molecules when the dipole moments are oriented perpendicular to the planes. The binding energy of two-body states with one polar molecule in each layer is…

量子气体 · 物理学 2015-03-19 N. T. Zinner , J. R. Armstrong , A. G. Volosniev , D. V. Fedorov , A. S. Jensen

Interacting Fermi gas provides an ideal model system to understand unconventional pairing and intertwined orders relevant to a large class of quantum materials. Rydberg-dressed Fermi gas is a recent experimental system where the sign,…

量子气体 · 物理学 2020-03-05 Ahmet Keles , Erhai Zhao , Xiaopeng Li

By using exact quantum Monte-Carlo methods we calculate the ground-state properties of the liquid phase in one-dimensional Bose mixtures with contact interactions. We find that the liquid state can be formed if the ratio of coupling…

量子气体 · 物理学 2019-03-27 L. Parisi , G. E. Astrakharchik , S. Giorgini

Molecular dimers are widely utilized as a tool to investigate the structure-property relationships behind the complex photophysical processes of condensed-phase systems, where structural tuning remains a challenge. This approach often…

It is shown that a sufficiently strong four-spin interaction in the spin-1/2 spin ladder can cause dimerization. Such interaction can be generated either by phonons or (in the doped state) by the conventional Coulomb repulsion between the…

凝聚态物理 · 物理学 2016-08-31 A. A. Nersesyan , A. M. Tsvelik

We show that dipolar bosons and fermions confined in a quasi-one-dimensional ring trap exhibit a rich variety of states because their interaction is inhomogeneous. For purely repulsive interactions, with increasing strength of the dipolar…

量子气体 · 物理学 2011-07-21 Sascha Zöllner , G. M. Bruun , C. J. Pethick , S. M. Reimann

Systems of Bose particles with both repulsive and attractive interactions are studied using the Skyrme-like mean-field model. The phase diagram of such systems exhibits two special lines in the chemical potential-temperature plane: one line…

We consider a classical interacting dimer model which interpolates between the square lattice case and the triangular lattice case by tuning a chemical potential in the diagonal bonds. The interaction energy simply corresponds to the number…

统计力学 · 物理学 2007-12-20 F. Trousselet , P. Pujol , F. Alet , D. Poilblanc

We investigate the problem of mechanical stability in two-dimensional Bose-Fermi mixtures at zero temperature, focusing on systems with a tunable Bose-Fermi (BF) interaction and a weak but finite boson-boson (BB) repulsion. The analysis is…

量子气体 · 物理学 2026-02-19 Pietro Cordioli , Leonardo Pisani , Pierbiagio Pieri

We consider the large-time dynamics of one-dimensional processes involving adsorption and desorption of extended hard-core particles (dimers, trimers,\,$\cdots,k$-mers), while interacting through their constituent monomers. Desorption can…

统计力学 · 物理学 2017-06-23 F. A. Gómez Albarracín , H. D. Rosales , M. D. Grynberg

We explore the quench dynamics of a two-dimensional, weakly interacting disordered Bose gas for various relative strengths of interactions and disorder. This allows us to identify two well distinct out-of-equilibrium regimes. When…

量子气体 · 物理学 2021-06-22 Thibault Scoquart , Pierre-Élie Larré , Dominique Delande , Nicolas Cherroret

We theoretically investigate the droplets formation in a tightly trapped one-dimensional dipolar gas of bosonic atoms. When the strength of the dipolar interaction becomes sufficiently attractive compared to the contact one, we show how a…

量子气体 · 物理学 2022-07-06 S. De Palo , E. Orignac , R. Citro

Dimerization and subsequent aggregation of polymers and biopolymers often occur under nonequilibrium conditions. When the initial state of the polymer is not collapsed or the final folded native state, the dynamics of dimerization can…

软凝聚态物质 · 物理学 2024-11-19 Sangita Mondal , Ved Mahajan , Biman Bagchi

The emergence of distinctly sub-diffusive scaling in the vicinity of an anomalous non-thermal fixed point is discussed in a quasi-two-dimensional dipolar Bose gas in the superfluid phase, carrying ensembles of vortices and antivortices with…

量子气体 · 物理学 2025-12-17 Niklas Rasch , Lauriane Chomaz , Thomas Gasenzer

We study dynamics of cosmological models with diffusion effects modeling dark matter and dark energy interactions. We show the simple model with diffusion between the cosmological constant sector and dark matter, where the canonical scaling…

广义相对论与量子宇宙学 · 物理学 2016-08-31 Marek Szydlowski , Aleksander Stachowski

We numerically study the dynamical properties of a mixture consisting of a dipolar condensate and a degenerate Fermi gas in a quasi-one-dimensional geometry. In particular, we focus on the system's response to a temporal variation in the…

量子气体 · 物理学 2025-11-26 Maciej Lewkowicz , Tomasz Karpiuk , Mariusz Gajda , Mirosław Brewczyk

A dilute bose gas in a quasi two-dimensional harmonic trap and interacting with a repulsive two-body zero-range potential of fixed coupling constant is considered. Using the Thomas-Fermi method, it is shown to remain in the same uncondensed…

介观与纳米尺度物理 · 物理学 2009-10-31 R. K. Bhaduri , S. M. Reimann , S. Viefers , A. Ghose Choudhury , M. K. Srivastava

We investigate a system of bosons in a two-dimensional harmonic trap. In the limit of strong attractive interactions, the bosons make a droplet insensitive to external confinement. For weak interactions, in contrast, the ground state is…

量子气体 · 物理学 2025-07-01 Fabian Brauneis , Artem G. Volosniev , Hans-Werner Hammer