Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Legeza, Örs"'
Autor:
Menczer, Andor, van Damme, Maarten, Rask, Alan, Huntington, Lee, Hammond, Jeff, Xantheas, Sotiris S., Ganahl, Martin, Legeza, Örs
We report cutting edge performance results for a hybrid CPU-multi GPU implementation of the spin adapted ab initio Density Matrix Renormalization Group (DMRG) method on current state-of-the-art NVIDIA DGX-H100 architectures. We evaluate the performan
Externí odkaz:
http://arxiv.org/abs/2407.07411
We propose a general approach to find an optimal representation of a quantum many body wave function for a given error margin via global fermionic mode optimization. The stationary point on a fixed rank matrix product state manifold is obtained via a
Externí odkaz:
http://arxiv.org/abs/2406.03449
Heavy atom compounds represent a challenge for computational chemistry, due to the need for simultaneous treatment of relativistic and correlation effects. Often such systems exhibit also strong correlation which hampers the application of perturbati
Externí odkaz:
http://arxiv.org/abs/2403.18473
Autor:
Penc, Patrik, Moca, Cătălin Paşcu, Legeza, Örs, Prosen, Tomaž, Zaránd, Gergely, Werner, Miklós Antal
Information propagation in the one-dimensional infinite temperature Hubbard model with a dissipative particle sink at the end of a semi-infinite chain is studied. In the strongly interacting limit, the two-site mutual information and the operator ent
Externí odkaz:
http://arxiv.org/abs/2402.19390
Publikováno v:
Phys. Rev. B 109, 195148 (2024)
We present a hybrid numerical approach to simulate quantum many body problems on two spatial dimensional quantum lattice models via the non-Abelian ab initio version of the density matrix renormalization group method on state-of-the-art high performa
Externí odkaz:
http://arxiv.org/abs/2311.14106
Publikováno v:
Phys. Rev. B 110, 085304 (2024)
Parafermions are anyons with the potential for realizing non-local qubits that are resilient to local perturbations. Compared to Majorana zero modes, braiding of parafermions implements an extended set of topologically protected quantum gates. This,
Externí odkaz:
http://arxiv.org/abs/2311.07359
Autor:
Menczer, Andor, Legeza, Örs
We present novel algorithmic solutions together with implementation details utilizing non-Abelian symmetries in order to boost the current limits of tensor network state algorithms on high performance computing infrastructure. In our in-house develop
Externí odkaz:
http://arxiv.org/abs/2309.16724
We determine the ground-state phase diagram for the 1/r-Hubbard model with repulsive nearest-neighbor interaction at half band-filling using the density-matrix renormalization group (DMRG) method. Due to the absence of Umklapp cattering, the phase di
Externí odkaz:
http://arxiv.org/abs/2309.04740
Autor:
Szombathy, Dominik, Werner, Miklós Antal, Moca, Cătălin Paşcu, Legeza, Örs, Hamo, Assaf, Ilani, Shahal, Zaránd, Gergely
Publikováno v:
Phys. Rev. B 109, 245139 (2024)
The collective tunneling of a Wigner necklace - a crystal-like state of a small number of strongly interacting electrons confined to a suspended nanotube and subject to a double well potential - is theoretically analyzed and compared with experiments
Externí odkaz:
http://arxiv.org/abs/2306.15985
Autor:
Menczer, Andor, Legeza, Örs
The interplay of quantum and classical simulation and the delicate divide between them is in the focus of massively parallelized tensor network state (TNS) algorithms designed for high performance computing (HPC). In this contribution, we present nov
Externí odkaz:
http://arxiv.org/abs/2305.05581