منابع مشابه
Complete view of Stark wave-packet evolution
Picosecond laser pulses have been used to produce Rydberg wave packets in calcium atoms in the presence of a strong static electric field. The dynamics of the Stark wave packets have been observed by measuring the momentum-space probability distribution as a function of time. The full precession of the electronic orbital angular momentum, the appearance of a large-amplitude, linear oscillation ...
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Availability of short, femtosecond laser pulses has recently made feasible the probing of phases in an atomic or molecular wave-packet (superposition of energy eigenstates). With short duration excitations the initial form of the wave-packet is an essentially real " doorway state " , and this develops phases for each of its component amplitudes as it evolves. It is suggested that these phases a...
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This work examines the extent to which a few basic concepts that apply to plane waves, for example, the refraction of waves up the gradient of the index of refraction, apply to stratospheric planetary waves. This is done by studying the relation between group velocity (Cg) and the wave activity velocity, which is defined as the Eliassen–Palm flux divided by the wave activity density (Va 5 F/A)....
متن کاملParticle creation in a colliding plane wave spacetime: Wave packet quantization.
We use wave packet mode quantization to compute the creation of massless scalar quantum particles in a colliding plane wave spacetime. The background spacetime represents the collision of two gravitational shock waves followed by trailing gravitational radiation which focus into a Killing-Cauchy horizon. The use of wave packet modes simplifies the problem of mode propagation through the differe...
متن کاملEvolution of a vibrational wave packet on a disordered chain
A linear chain of point masses coupled by harmonic springs is a standard model used to introduce concepts of solid state physics. The well-ordered chain has sinusoidal standing wave normal modes ~if the ends are fixed! or traveling wave normal modes ~if the ends are connected in a ring!. Ballistically propagating wave packets can be built from these normal modes, and illustrate the mechanism of...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1986
ISSN: 0031-9007
DOI: 10.1103/physrevlett.56.2000