Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Rohe, Daniel P."'
Autor:
Rohe, Daniel
Publikováno v:
SciPost Phys. 15, 192 (2023)
We extend and apply a recently introduced quasi-particle functional renormalisation group scheme to the two-dimensional Hubbard model with next-nearest-neighbour hopping and away from half filling. We confirm the generation of superconducting correla
Externí odkaz:
http://arxiv.org/abs/2304.09001
Autor:
Rohe, Daniel
A recently proposed extension of the interaction flow method is applied to exemplary cases of selected physical and methodical parameters for the two-dimensional Hubbard model away from half-filling and perfect nesting. In this scheme, the self-energ
Externí odkaz:
http://arxiv.org/abs/2201.04823
Autor:
Schäfer, Thomas, Wentzell, Nils, Šimkovic IV, Fedor, He, Yuan-Yao, Hille, Cornelia, Klett, Marcel, Eckhardt, Christian J., Arzhang, Behnam, Harkov, Viktor, Régent, François-Marie Le, Kirsch, Alfred, Wang, Yan, Kim, Aaram J., Kozik, Evgeny, Stepanov, Evgeny A., Kauch, Anna, Andergassen, Sabine, Hansmann, Philipp, Rohe, Daniel, Vilk, Yuri M., LeBlanc, James P. F., Zhang, Shiwei, Tremblay, A. -M. S., Ferrero, Michel, Parcollet, Olivier, Georges, Antoine
Publikováno v:
Phys. Rev. X 11, 011058 (2021)
The Hubbard model represents the fundamental model for interacting quantum systems and electronic correlations. Using the two-dimensional half-filled Hubbard model at weak coupling as a testing ground, we perform a comparative study of a comprehensiv
Externí odkaz:
http://arxiv.org/abs/2006.10769
Publikováno v:
Phys. Rev. Research 2, 033068 (2020)
Using the recently introduced multiloop extension of the functional renormalization group, we compute the frequency- and momentum-dependent self-energy of the two-dimensional Hubbard model at half filling and weak coupling. We show that, in the trunc
Externí odkaz:
http://arxiv.org/abs/2003.01447
Autor:
Rohe, Daniel
The functional renormalisation group (fRG) has evolved into a versatile tool in condensed matter theory for studying important aspects of correlated electron systems. Practical applications of the method often involve a high numerical effort, motivat
Externí odkaz:
http://arxiv.org/abs/1510.07799
Publikováno v:
Eur. Phys. J. B. 48, 349-358 (2005)
We generalize the application of the functional renormalization group (fRG) method for the fermionic flow into the symmetry-broken phase to finite temperatures. We apply the scheme to the case of a broken discrete symmetry: the charge-density wave (C
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509240
Autor:
Rohe, Daniel, Metzner, Walter
Publikováno v:
Phys. Rev. B 71, 115116 (2005)
We analyze the interaction-induced renormalization of single-particle excitations in the two-dimensional Hubbard model at weak coupling using the Wick-ordered version of the functional renormalization group. The self energy is computed for real frequ
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406164
Publikováno v:
Phys. Rev. B 70, 235115 (2004)
We propose an interaction flow scheme that sums up the perturbation expansion of many-particle systems by successively increasing the interaction strength. It combines the unbiasedness of renormalization group methods with the simplicity of straight-
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403633
Autor:
Rohe, Daniel, Metzner, Walter
Publikováno v:
Phys. Rev. B 63, 224509
One-particle spectral properties in the normal phase of the two-dimensional attractive Hubbard model are investigated in the weak coupling regime using the non-selfconsistent T-matrix approximation. The corresponding equations are evaluated numerical
Externí odkaz:
http://arxiv.org/abs/cond-mat/0011500
Publikováno v:
In Mechanical Systems and Signal Processing 1 March 2017 86 Part B:2-16
