Results 101 to 110 of about 17,102 (215)

Exact solutions and accelerating universe in modified Brans–Dicke theories

European Physical Journal C: Particles and Fields, 2019
Exact solutions are studied in the context of modified Brans–Dicke theory. The non-linearity of the modified Brans–Dicke field equations is treated with the Euler–Duarte–Moreira method of integrability of anharmonic oscillator equation.
Purba Mukherjee, Soumya Chakrabarti
doaj   +1 more source

Molecules and the Eigenstate Thermalization Hypothesis

Entropy, 2018
We review a theory that predicts the onset of thermalization in a quantum mechanical coupled non-linear oscillator system, which models the vibrational degrees of freedom of a molecule.
David M. Leitner
doaj   +1 more source

The second order phase transition in Sn₂P₂S₆ crystals: anharmonic oscillator model

Condensed Matter Physics, 2008
Statistical theory for ferroelectrics based on triple well anharmonic potential was used for the case of structural second order phase transition in Sn2P2S6 crystals.
Yu.M. Vysochanskii, R.M. Yevych
doaj   +1 more source

Universal early-time growth in quantum circuit complexity

Journal of High Energy Physics
We show that quantum circuit complexity for the unitary time evolution operator of any time-independent Hamiltonian is bounded by linear growth at early times, independent of any choices of the fundamental gates or cost metric.
S. Shajidul Haque, Ghadir Jafari, Bret Underwood   +2 more
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Correction to 'A doubly anharmonic oscillator in an induced electric dipole system'. [PDF]

Proc Math Phys Eng Sci, 2019
Bakke K, Salvador C.
europepmc   +1 more source

A doubly anharmonic oscillator in an induced electric dipole system. [PDF]

Proc Math Phys Eng Sci, 2018
Bakke K, Salvador C.
europepmc   +1 more source

Reducing the sign problem with line integrals

Journal of High Energy Physics
We present a novel strategy to strongly reduce the severity of the sign problem, using line integrals along paths of changing imaginary action. Highly oscillating regions along these paths cancel out, decreasing their contributions. As a result, sampling
Rasmus N. Larsen
doaj   +1 more source

Geometric quantum complexity of bosonic oscillator systems

Journal of High Energy Physics
According to the pioneering work of Nielsen and collaborators, the length of the minimal geodesic in a geometric realization of a suitable operator space provides a measure of the quantum complexity of an operation.
Satyaki Chowdhury, Martin Bojowald, Jakub Mielczarek   +2 more
doaj   +1 more source

Addressing the non-perturbative regime of the quantum anharmonic oscillator by physics-informed neural networks

New Journal of Physics
The use of deep learning in physical sciences has recently boosted the ability of researchers to tackle physical systems where little or no analytical insight is available.
Lorenzo Brevi, Antonio Mandarino, Enrico Prati   +2 more
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Exactly Solvable Anharmonic Oscillator, Degenerate Orthogonal Polynomials and Painlevé II. [PDF]

Commun Math Phys
Bertola M, Chavez-Heredia E, Grava T.
europepmc   +1 more source