Zobrazeno 1 - 10
of 1 311
pro vyhledávání: '"Spencer, P. S."'
Autor:
Spencer, Michael S., Urban, Joanna M., Frenzel, Maximilian, Mueller, Niclas S., Minakova, Olga, Wolf, Martin, Paarmann, Alexander, Maehrlein, Sebastian F.
Cavity electrodynamics offers a unique avenue for tailoring ground-state material properties, excited-state engineering, and versatile control of quantum matter. Merging these concepts with high-field physics in the terahertz (THz) spectral range ope
Externí odkaz:
http://arxiv.org/abs/2406.14749
Quantum chemical calculations of the ground-state properties of positron-molecule complexes are challenging. The main difficulty lies in employing an appropriate basis set for representing the coalescence between electrons and a positron. Here, we ta
Externí odkaz:
http://arxiv.org/abs/2310.05607
Autor:
Frenzel, Maximilian, Urban, Joanna M., Nest, Leona, Kampfrath, Tobias, Spencer, Michael S., Maehrlein, Sebastian F.
The advent of high-field THz sources has opened the field of nonlinear THz physics and unlocked access to fundamental low energy excitations for ultrafast material control. Recent advances towards controlling and employing chiral excitations, or gene
Externí odkaz:
http://arxiv.org/abs/2309.08286
Publikováno v:
Science 385, 6711 (2024)
We present a variational Monte Carlo algorithm for estimating the lowest excited states of a quantum system which is a natural generalization of the estimation of ground states. The method has no free parameters and requires no explicit orthogonaliza
Externí odkaz:
http://arxiv.org/abs/2308.16848
Autor:
Lou, Wan Tong, Sutterud, Halvard, Cassella, Gino, Foulkes, W. M. C., Knolle, Johannes, Pfau, David, Spencer, James S.
Publikováno v:
Phys. Rev. X 14, 021030 (2024)
Understanding superfluidity remains a major goal of condensed matter physics. Here we tackle this challenge utilizing the recently developed Fermionic neural network (FermiNet) wave function Ansatz [D. Pfau et al., Phys. Rev. Res. 2, 033429 (2020).]
Externí odkaz:
http://arxiv.org/abs/2305.06989
We present a novel neural network architecture using self-attention, the Wavefunction Transformer (Psiformer), which can be used as an approximation (or Ansatz) for solving the many-electron Schr\"odinger equation, the fundamental equation for quantu
Externí odkaz:
http://arxiv.org/abs/2211.13672
Autor:
Schaarschmidt, Michael, Riviere, Morgane, Ganose, Alex M., Spencer, James S., Gaunt, Alexander L., Kirkpatrick, James, Axelrod, Simon, Battaglia, Peter W., Godwin, Jonathan
We present evidence that learned density functional theory (``DFT'') force fields are ready for ground state catalyst discovery. Our key finding is that relaxation using forces from a learned potential yields structures with similar or lower energy t
Externí odkaz:
http://arxiv.org/abs/2209.12466
We report the development of a python-based auxiliary-field quantum Monte Carlo (AFQMC) program, ipie, with preliminary timing benchmarks and new AFQMC results on the isomerization of [Cu$_2$O$_2$$]^{2+}$. We demonstrate how implementations for both
Externí odkaz:
http://arxiv.org/abs/2209.04015
Autor:
Cassella, G., Sutterud, H., Azadi, S., Drummond, N. D., Pfau, D., Spencer, J. S., Foulkes, W. M. C.
Deep neural networks have been extremely successful as highly accurate wave function ans\"atze for variational Monte Carlo calculations of molecular ground states. We present an extension of one such ansatz, FermiNet, to calculations of the ground st
Externí odkaz:
http://arxiv.org/abs/2202.05183
Autor:
Spencer, Michael S., Fu, Yongping, Schlaus, Andrew P., Hwang, Doyk, Dai, Yanan, Smith, Matthew D., Gamelin, Daniel R., Zhu, X. -Y.
Spin-orbit coupling (SOC) is responsible for a range of spintronic and topological processes in condensed matter. Here we show photonic analogs of SOCs in exciton-polaritons and their condensates in microcavities composed of birefringent lead halide
Externí odkaz:
http://arxiv.org/abs/2106.06034