Ángel S. Sanz's A Trajectory Description of Quantum Processes. II. PDF

By Ángel S. Sanz

ISBN-10: 3642179738

ISBN-13: 9783642179730

ISBN-10: 3642179746

ISBN-13: 9783642179747

Trajectory-based formalisms are an intuitively beautiful method of describing quantum techniques simply because they enable using "classical" strategies. starting as an introductory point compatible for college students, this two-volume monograph offers (1) the basics and (2) the functions of the trajectory description of easy quantum strategies. This moment quantity is focussed on uncomplicated and easy purposes of quantum strategies comparable to interference and diffraction of wave packets, tunneling, diffusion and bound-state and scattering difficulties. The corresponding research is performed in the Bohmian framework. by means of stressing its interpretational features, the e-book leads the reader to another and complementary strategy to larger comprehend the underlying quantum dynamics.

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Extra resources for A Trajectory Description of Quantum Processes. II. Applications: A Bohmian Perspective

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4). Its propagation follows the classical uniform accelerated motion displayed by its centroid, xt = x0 + (p0 /m)t − V0 t 2 /2m and pt = p0 − V0 t. As for its average energy, 2 p2 e−γ t . 59) 24 1 Wave-Packet Dynamics: The Free-Particle Physics Fig. 46 (red dashed-dotted line). 625), σ0 = 1, m = 1, and = 1. 46. 56). These trajectories are displayed in Fig. 10 for three different values of the friction. Moreover, to compare with, the frictionless case has also been included in each panel. 1 after some time.

According to Ford et al. [59–61], this normal distribution is associated with two measurements at two different times. 63) with i = x, y. 65) . 66) with Φ(γ t) = 1 − exp(−γ t). For each degree of freedom, one obtains the same spreading because both the initial width and the noise fluctuations are assumed to be the same in both directions (isotropic surface). 7 Stochastic Wave-Packet Dynamics 27 with ∞ F (γ t; T ) = z 1 − cos z dz. 67) as si (t) = 1 2kB T t − Φ(γ t) . 70) while the MSD is linear with time, s(t) ≈ 2kB T t.

81) at zero surface temperature. 8 Quantum Zeno and Anti-Zeno Effects The legacy of Zeno of Elea becomes very apparent through calculus, the pillar of physics. It is not difficult to find manifestations of his famous paradoxes throughout the subtleties of any of our physical theories [66]. In quantum mechanics, for example, Zeno’s paradox of the arrow is of particular interest, for it has given rise to what is now known as quantum Zeno effect (QZE), which constitutes an active field of research [67].

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A Trajectory Description of Quantum Processes. II. Applications: A Bohmian Perspective by Ángel S. Sanz

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