Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Siro, Topi"'
Publikováno v:
Phys. Rev. B 95, 024515 (2017)
We present a theory of the superfluid weight in multiband attractive Hubbard models within the Bardeen-Cooper-Schrieffer (BCS) mean field framework. We show how to separate the geometric contribution to the superfluid weight from the conventional one
Externí odkaz:
http://arxiv.org/abs/1610.01803
Publikováno v:
Phys. Rev. Lett. 116, 225305 (2016)
Using dynamical mean-field theory and exact diagonalization we study the phase diagram of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice potential difference. In addition to the quantum Hall phase with Chern
Externí odkaz:
http://arxiv.org/abs/1512.08804
Autor:
Siro, Topi, Harju, Ari
We implement the Lanczos algorithm on an Intel Xeon Phi coprocessor and compare its performance to a multi-core Intel Xeon CPU and an NVIDIA graphics processor. The Xeon and the Xeon Phi are parallelized with OpenMP and the graphics processor is prog
Externí odkaz:
http://arxiv.org/abs/1511.00863
Publikováno v:
Phys. Rev. B 90 (2014), 165101
We study the toplogical checkerboard lattice model around the $\nu=\frac{1}{3}$ fractional quantum Hall phase using numerical exact diagonalization without Landau level projections. We add local perturbations, modified hoppings and on-site potentials
Externí odkaz:
http://arxiv.org/abs/1405.2211
Publikováno v:
2013 New J. Phys. 15 103015
In double quantum dot singlet-triplet qubits, the exchange interaction is used in both quantum gate operation and the measurement of the state of the qubit. The exchange can be controlled electronically by applying gate voltage pulses. We simulate th
Externí odkaz:
http://arxiv.org/abs/1309.6889
Publikováno v:
Physical Review B 89, 041105(R) (2014)
The correlated motion of a positron surrounded by electrons is a fundamental many-body problem. We approach this by modeling the momentum density of annihilating electron-positron pairs using the framework of reduced density matrices, natural orbital
Externí odkaz:
http://arxiv.org/abs/1309.6886
Publikováno v:
Computer Physics Communications, Volume 185, Issue 1, January 2014, Pages 28-39
We implement, optimize, and validate the linear-scaling Kubo-Greenwood quantum transport simulation on graphics processing units by examining resonant scattering in graphene. We consider two practical representations of the Kubo-Greenwood formula: a
Externí odkaz:
http://arxiv.org/abs/1307.0288
We present a highly flexible computational scheme for studying correlated electrons confined by an arbitrary external potential in two-dimensional semiconductor quantum dots. The method starts by a Lagrange mesh calculation for the single-particle st
Externí odkaz:
http://arxiv.org/abs/1301.6517
Publikováno v:
Computer Physics Communications, Volume 184, Issue 5, May 2013, Pages 1414-1425
In this paper, we develop a highly efficient molecular dynamics code fully implemented on graphics processing units for thermal conductivity calculations using the Green-Kubo formula. We compare two different schemes for force evaluation, a previousl
Externí odkaz:
http://arxiv.org/abs/1211.3892
Publikováno v:
Lecture Notes in Computer Science, volume 7782, pp 3-26 (2013). In "Applied Parallel and Scientific Computing", Editors Pekka Manninen and Per \"Oster
The use of graphics processing units for scientific computations is an emerging strategy that can significantly speed up various different algorithms. In this review, we discuss advances made in the field of computational physics, focusing on classic
Externí odkaz:
http://arxiv.org/abs/1210.7930