Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Ghanem, Khaldoon"'
Autor:
Nigmatullin, Ramil, Hemery, Kevin, Ghanem, Khaldoon, Moses, Steven, Gresh, Dan, Siegfried, Peter, Mills, Michael, Gatterman, Thomas, Hewitt, Nathan, Granet, Etienne, Dreyer, Henrik
The utility of solving the Fermi-Hubbard model has been estimated in the billions of dollars. Digital quantum computers can in principle address this task, but have so far been limited to quasi one-dimensional models. This is because of exponential o
Externí odkaz:
http://arxiv.org/abs/2409.06789
Despite its simplicity and strong theoretical guarantees, adiabatic state preparation has received considerably less interest than variational approaches for the preparation of low-energy electronic structure states. Two major reasons for this are th
Externí odkaz:
http://arxiv.org/abs/2407.09993
Autor:
Hémery, Kévin, Ghanem, Khaldoon, Crane, Eleanor, Campbell, Sara L., Dreiling, Joan M., Figgatt, Caroline, Foltz, Cameron, Gaebler, John P., Johansen, Jacob, Mills, Michael, Moses, Steven A., Pino, Juan M., Ransford, Anthony, Rowe, Mary, Siegfried, Peter, Stutz, Russell P., Dreyer, Henrik, Schuckert, Alexander, Nigmatullin, Ramil
Calculating the equilibrium properties of condensed matter systems is one of the promising applications of near-term quantum computing. Recently, hybrid quantum-classical time-series algorithms have been proposed to efficiently extract these properti
Externí odkaz:
http://arxiv.org/abs/2309.10552
Autor:
Ghanem, Khaldoon, Koch, Erik
We show that in the continuum limit, the average spectrum method (ASM) is equivalent to maximizing R\'enyi entropies of order $\eta$, of which Shannon entropy is the special case $\eta=1$. The order of R\'enyi entropy is determined by the way the spe
Externí odkaz:
http://arxiv.org/abs/2307.11446
Publikováno v:
Quantum 7, 1163 (2023)
Simulating properties of quantum materials is one of the most promising applications of quantum computation, both near- and long-term. While real-time dynamics can be straightforwardly implemented, the finite temperature ensemble involves non-unitary
Externí odkaz:
http://arxiv.org/abs/2305.19322
Autor:
Ghanem, Khaldoon, Koch, Erik
Publikováno v:
Phys. Rev. B 107, 085129 (2023)
Analytic continuation is an essential step in extracting information about the dynamical properties of physical systems from quantum Monte Carlo (QMC) simulations. Different methods for analytic continuation have been proposed and are still being dev
Externí odkaz:
http://arxiv.org/abs/2212.05475
Publikováno v:
Phys. Rev. B 103, 155135 (2021)
Population control is an essential component of any projector Monte Carlo algorithm. This control mechanism usually introduces a bias in the sampled quantities that is inversely proportional to the population size. In this paper, we investigate the p
Externí odkaz:
http://arxiv.org/abs/2102.11016
In a recent paper, we proposed the adaptive shift method for correcting the undersampling bias of the initiator-FCIQMC. The method allows faster convergence with the number of walkers to the FCI limit than the normal initiator method, particularly fo
Externí odkaz:
http://arxiv.org/abs/2010.05743
Autor:
Eriksen, Janus J., Anderson, Tyler A., Deustua, J. Emiliano, Ghanem, Khaldoon, Hait, Diptarka, Hoffmann, Mark R., Lee, Seunghoon, Levine, Daniel S., Magoulas, Ilias, Shen, Jun, Tubman, Norman M., Whaley, K. Birgitta, Xu, Enhua, Yao, Yuan, Zhang, Ning, Alavi, Ali, Chan, Garnet Kin-Lic, Head-Gordon, Martin, Liu, Wenjian, Piecuch, Piotr, Sharma, Sandeep, Ten-no, Seiichiro L., Umrigar, C. J., Gauss, Jürgen
Publikováno v:
J. Phys. Chem. Lett., 11, 8922 (2020)
We report on the findings of a blind challenge devoted to determining the frozen-core, full configuration interaction (FCI) ground state energy of the benzene molecule in a standard correlation-consistent basis set of double-$\zeta$ quality. As a bro
Externí odkaz:
http://arxiv.org/abs/2008.02678
Autor:
Guther, Kai, Anderson, Robert J., Blunt, Nick S., Bogdanov, Nikolay A., Cleland, Deidre, Dattani, Nike, Dobrautz, Werner, Ghanem, Khaldoon, Jeszenski, Peter, Liebermann, Niklas, Manni, Giovanni Li, Lozovoi, Alexander Y., Luo, Hongjun, Ma, Dongxia, Merz, Florian, Overy, Catherine, Rampp, Markus, Samanta, Pradipta K., Schwarz, Lauretta R., Shepherd, James J., Smart, Simon D., Vitale, Eugenio, Weser, Oskar, Booth, George H., Alavi, Ali
We present NECI, a state-of-the-art implementation of the Full Configuration Interaction Quantum Monte Carlo algorithm, a method based on a stochastic application of the Hamiltonian matrix on a sparse sampling of the wave function. The program utiliz
Externí odkaz:
http://arxiv.org/abs/2006.14956