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pro vyhledávání: '"Briggs, John S."'
Autor:
Feagin, James M., Briggs, John S.
Unbound wave packets propagating to macroscopic space and time coordinates become proportional to their (Fourier transform) momentum distribution at earlier times whereby the asymptotic coordinates and the initial momenta are connected everywhere by
Externí odkaz:
http://arxiv.org/abs/2207.13617
Akademický článek
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Autor:
Briggs, John S., Feagin, James M.
Publikováno v:
Adv. At. Mol. Opt. Phys. ,vol.70, p.263-320 (2021)
Conventional scattering theory is incomplete in that it does not adequately describe the behaviour of the wave function at macroscopic distances from the scattering reaction volume. In scattering experiments particles are incident from sources at mac
Externí odkaz:
http://arxiv.org/abs/1812.00907
Autor:
Briggs, John S.
Publikováno v:
Molecular Beams in Physics and Chemistry chapter 11 (eds. B.Friedrich and H.Schmidt-Boecking, Springer Nature) 2021
An assessment is given as to the extent to which pure unitary evolution, as distinct from environmental decohering interaction, can provide the transition necessary for an observer to interpret perceived quantum dynamics as classical. This has implic
Externí odkaz:
http://arxiv.org/abs/1707.05006
Autor:
Feagin, James M., Briggs, John S.
The precise connection between quantum wave functions and the underlying classical trajectories often is presented rather vaguely by practitioners of quantum mechanics. Here we demonstrate, with simple examples, that the imaging theorem (IT) based on
Externí odkaz:
http://arxiv.org/abs/1702.07683
Autor:
Klaiber, Michael, Briggs, John S
We present a theory illuminating the cross-over from strong-field tunnelling ionization to weak-field multiphoton ionization in the interaction of a classical laser field with a hydrogen atom. A simple formula is derived in which the ionization ampli
Externí odkaz:
http://arxiv.org/abs/1609.04374
Autor:
Briggs, John S., Feagin, James M.
The mechanism of the transition of a dynamical system from quantum to classical mechanics is of continuing interest. Practically it is of importance for the interpretation of multi-particle coincidence measurements performed at macroscopic distances
Externí odkaz:
http://arxiv.org/abs/1601.02588
Autor:
Briggs, John S., Feagin, James M.
The mechanism of the transition of a dynamical system from quantum to classical mechanics is one of the remaining challenges of quantum theory. Currently, it is considered to occur via decoherence caused by entanglement and/or stochastic interaction
Externí odkaz:
http://arxiv.org/abs/1506.04287
Autor:
Briggs, John S.
Publikováno v:
Physical Review A91, 052119 (2015)
Beginning with the principle that a closed mechanical composite system is timeless, time can be defined by the regular changes in a suitable position coordinate (clock) in the observing part, when one part of the closed composite observes another par
Externí odkaz:
http://arxiv.org/abs/1503.02146
Publikováno v:
Chem. Phys. 352 (2008) 258
The validity of the CES approximation is investigated by comparison with direct diagonalisation of a model vibronic Hamiltonian of $N$ identical monomers interacting electronically. Even for quite short aggregates (N\gtrsim 6) the CES approximation i
Externí odkaz:
http://arxiv.org/abs/1008.3623