Zobrazeno 1 - 10
of 29
pro vyhledávání: '"James K. Freericks"'
Theoretical Description of Pump-Probe Experiments in Charge-Density-Wave Materials out to Long Times
Publikováno v:
Physical Review X, Vol 14, Iss 3, p 031052 (2024)
We describe coupled nonequilibrium electron-phonon systems semiclassically—Ehrenfest dynamics for the phonons and quantum mechanics for the electrons—using a classical Monte Carlo approach that determines the nonequilibrium response to a large pu
Externí odkaz:
https://doaj.org/article/f74861beb9cb40698c2f862b6731ce21
Publikováno v:
Quantum Reports, Vol 5, Iss 2, Pp 370-397 (2023)
Quantum mechanics has about a dozen exactly solvable potentials. Normally, the time-independent Schrödinger equation for them is solved by using a generalized series solution for the bound states (using the Fröbenius method) and then an analytic co
Externí odkaz:
https://doaj.org/article/7355725a4ac64007b5e9563ec31c36ec
Publikováno v:
Symmetry, Vol 16, Iss 3, p 297 (2024)
Using a flexible form for ladder operators that incorporates confluent hypergeometric functions, we show how one can determine all of the discrete energy eigenvalues and eigenvectors of the time-independent Schrödinger equation via a single factoriz
Externí odkaz:
https://doaj.org/article/87e8b5f082a241aa92011b6551e8f86c
Autor:
Luogen Xu, James K. Freericks
Publikováno v:
Symmetry, Vol 15, Iss 7, p 1429 (2023)
The variational quantum eigensolver is one of the most promising algorithms for near-term quantum computers. It has the potential to solve quantum chemistry problems involving strongly correlated electrons with relatively low-depth circuits, which ar
Externí odkaz:
https://doaj.org/article/54ec48d296544860833729c1d121a317
Publikováno v:
Symmetry, Vol 15, Iss 4, p 797 (2023)
The factorization method was introduced by Schrödinger in 1940. Its use in bound-state problems is widely known, including in supersymmetric quantum mechanics; one can create a factorization chain, which simultaneously solves a sequence of auxiliary
Externí odkaz:
https://doaj.org/article/3ad766211d4a49c394bb0ab5c6231086
Publikováno v:
Symmetry, Vol 14, Iss 4, p 809 (2022)
Quantum phase transitions materialize as level crossings in the ground-state energy when the parameters of the Hamiltonian are varied. The resulting ground-state phase diagrams are straightforward to determine by exact diagonalization on classical co
Externí odkaz:
https://doaj.org/article/dd928b33c0c645f39fb4479886192cd5
Publikováno v:
Frontiers in Chemistry, Vol 8 (2020)
Chemistry is considered as one of the more promising applications to science of near-term quantum computing. Recent work in transitioning classical algorithms to a quantum computer has led to great strides in improving quantum algorithms and illustra
Externí odkaz:
https://doaj.org/article/5b02cd1748f14193a1412a4fe8f3cdfa
Autor:
Herbert F. Fotso, James K. Freericks
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
Recent experimental advances in ultrafast phenomena have triggered renewed interest in the dynamics of correlated quantum systems away from equilibrium. We review non-equilibrium dynamical mean-field theory studies of both the transient and the stead
Externí odkaz:
https://doaj.org/article/655e451608a54b329502b4dc1f25529e
Autor:
James K. Freericks
Publikováno v:
Symmetry, Vol 14, Iss 3, p 494 (2022)
The chemistry community has long sought the exact relationship between the conventional and the unitary coupled cluster ansatz for a single-reference system, especially given the interest in performing quantum chemistry on quantum computers. In this
Externí odkaz:
https://doaj.org/article/15b2de4cebe44ad4b78defd0a3a9f2e0
Publikováno v:
Atoms, Vol 10, Iss 1, p 14 (2022)
We generalize Schrödinger’s factorization method for Hydrogen from the conventional separation into angular and radial coordinates to a Cartesian-based factorization. Unique to this approach is the fact that the Hamiltonian is represented as a sum
Externí odkaz:
https://doaj.org/article/1e23e382f3004298ba526f8e2909832b