Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Klumper, Andreas"'
Analytical results on the correlation functions of strongly correlated many-body systems are rare in the literature and their importance cannot be overstated. We present determinant representations for the space-, time-, and temperature-dependent cor
Externí odkaz:
http://arxiv.org/abs/2408.09721
Publikováno v:
Phys. Rev. B 101, 035149 (2020)
Even though the Hubbard model is one of the most fundamental models of highly correlated electrons, analytical and numerical data describing its thermodynamics at nonzero magnetization are relatively scarce. We present a detailed investigation of the
Externí odkaz:
http://arxiv.org/abs/1910.09535
Autor:
Patu, Ovidiu I., Klumper, Andreas
Publikováno v:
Phys. Rev. A 99, 013628 (2019)
We investigate the one-dimensional mixture of scalar bosons and spin polarized fermions interacting through a $\delta$-function potential. Using a thermodynamic description derived by employing a lattice embedding of the continuum model and the quant
Externí odkaz:
http://arxiv.org/abs/1811.08692
Publikováno v:
Phys. Rev. Lett. 120, 243402 (2018)
We investigate the universal thermodynamics of the two-component one-dimensional Bose gas with contact interactions in the vicinity of the quantum critical point separating the vacuum and the ferromagnetic liquid regime. We find that the quantum crit
Externí odkaz:
http://arxiv.org/abs/1711.04790
Autor:
Patu, Ovidiu I., Klumper, Andreas
Publikováno v:
Phys. Rev. A 96, 063612 (2017)
We investigate universal properties of one-dimensional multi-component systems comprised of fermions, bosons, or an arbitrary mixture, with contact interactions and subjected to an external potential. The masses and the coupling strengths between dif
Externí odkaz:
http://arxiv.org/abs/1711.03507
Publikováno v:
Phys. Rev. E 94, 060102 (2016)
We consider discrete time Brownian ratchet models: Parrondo's games. Using the Fourier transform, we calculate the exact probability distribution functions for both the capital dependent and history dependent Parrondo's games. We find that in some ca
Externí odkaz:
http://arxiv.org/abs/1608.04482
Autor:
Patu, Ovidiu I., Klumper, Andreas
Publikováno v:
Phys. Rev. A 93, 033616 (2016)
We address the problem of computing the thermodynamic properties of the repulsive one-dimensional two-component Fermi gas with contact interaction, also known as the Gaudin-Yang model. Using a specific lattice embedding and the quantum transfer matri
Externí odkaz:
http://arxiv.org/abs/1512.07485
Autor:
Patu, Ovidiu I., Klumper, Andreas
Publikováno v:
Phys. Rev. A 92, 043631 (2015)
We investigate the finite temperature properties of the one-dimensional two-component Bose gas (2CBG) with repulsive contact interaction in a harmonic trap. Making use of a new lattice embedding for the 2CBG and the quantum transfer matrix we derive
Externí odkaz:
http://arxiv.org/abs/1508.07758
Autor:
Klumper, Andreas, Patu, Ovidiu I.
Publikováno v:
Phys. Rev. A 90, 053626 (2014)
The large-distance behavior of the density-density correlation function in the Lieb-Liniger model at finite temperature is investigated by means of the recently derived nonlinear integral equations characterizing the correlation lengths. We present e
Externí odkaz:
http://arxiv.org/abs/1407.4710
Autor:
Patu, Ovidiu I., Klumper, Andreas
Publikováno v:
Phys. Rev. A 88, 033623 (2013)
We investigate the large-distance asymptotic behavior of the static density-density and field-field correlation functions in the one-dimensional Bose gas at finite temperature. The asymptotic expansions of the Bose gas correlators are obtained perfor
Externí odkaz:
http://arxiv.org/abs/1211.4200