Zobrazeno 1 - 10
of 193
pro vyhledávání: '"McGuire, J. H."'
We consider the time evolution of nearly degenerate two-state systems with an external interaction. Conditions in which full population transfer is possible when the two-states become degenerate are considered. A new variation of the coupled differen
Externí odkaz:
http://arxiv.org/abs/1607.02499
Autor:
Kaplan, Lev, McGuire, J. H.
Publikováno v:
Phys. Rev. A 92, 032702 (2015)
Scattering of beams of light and matter from multi-electron atomic targets is formulated in the position representation of quantum mechanics. This yields expressions for the probability amplitude, a(b), for a wide variety of processes. Here the spati
Externí odkaz:
http://arxiv.org/abs/1506.06350
Publikováno v:
Phys. Rev. A 89, 043826 (2014)
The relatively new atomic form factor for twisted (vortex) beams, which carry orbital angular momentum (OAM), is considered and compared to the conventional atomic form factor for plane wave beams that carry only spin angular momentum (SAM). Since th
Externí odkaz:
http://arxiv.org/abs/1402.0821
Publikováno v:
J. Opt. 15 (2013) 035403
We obtain an expression for the matrix element for a twisted (Laguerre-Gaussian profile) photon scattering from a hydrogen atom. We consider photons incoming with an orbital angular momentum (OAM) of $\ell \hbar$, carried by a factor of $e^{i \ell \p
Externí odkaz:
http://arxiv.org/abs/1206.6935
Autor:
McGuire, J. H., Kaplan, L., Shakov, Kh. Kh., Chalastaras, A., Smith, A. M., Godunov, A., Schmidt-Böcking, H., Uskov, D.
Time ordering may be defined by first defining the limit of no time ordering (NTO) in terms of a time average of an external interaction, V(t). Previously, time correlation was defined in terms of a similar limit called the independent time approxima
Externí odkaz:
http://arxiv.org/abs/quant-ph/0512254
The behavior of simply pulsed qubits (quantum systems with two linearly independent states) may be characterized by the energy difference $\Delta E$ between the two states of the qubit and by an external stimulating potential $V(t)$ that causes trans
Externí odkaz:
http://arxiv.org/abs/quant-ph/0507138
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 39 (2006) 1361-1378
Analytic solutions are developed for two-state systems (e.g. qubits) strongly perturbed by a series of rapidly changing pulses, called `kicks'. The evolution matrix may be expressed as a time ordered product of evolution matrices for single kicks. Si
Externí odkaz:
http://arxiv.org/abs/quant-ph/0503086
Publikováno v:
Phys. Rev. A 70, 063401 (2004)
We examine time ordering effects in strongly, suddenly perturbed two-state quantum systems (kicked qubits) by comparing results with time ordering to results without time ordering. Simple analytic expressions are given for state occupation amplitudes
Externí odkaz:
http://arxiv.org/abs/quant-ph/0406177
We examine how time ordering works in quantum mechanics and in classical mechanics.
Comment: 13 pages, 3 figures
Comment: 13 pages, 3 figures
Externí odkaz:
http://arxiv.org/abs/quant-ph/0312179