Small-Momentum-Transfer Structure Factor of Quantum Liquids

Dynamics of quantum liquids at high momentum.

The dynamic form factor S(Q, co) in liquid He and He is evaluated in the wave-vector transfer o ] range 3&Q &15 A . The input is the pair interatomic potential, developed by Aziz et al. The S(Q, to) is calculated within the random-phase approximation (RPA) which becomes valid when RQ is much larger than the average momentum in the liquid. A T-matrix approximation represents the interaction appe...

Coulomb drag by small momentum transfer between quantum wires.

We demonstrate that in a wide range of temperatures Coulomb drag between two weakly coupled quantum wires is dominated by processes with a small interwire momentum transfer. Such processes, not accounted for in the conventional Luttinger liquid theory, cause drag only because the electron dispersion relation is not linear. The corresponding contribution to the drag resistance scales with temper...

Momentum distributions in quantum and nearly classical liquids.

Using high-precision neutron-scattering data, we show that the momentum distribution, n(k), in normal He differs significantly from the classical, Maxwell-Boltzmann distribution while n(k) in liquid neon is Maxwellian. Final-state contributions to the scattering function are also determined from the data. In helium these are most conveniently represented as a final-state broadening function and...

Nature of Quantum Localization in Atomic Momentum Transfer Experiments.

Comment on " Nature of Quantum Localization in Atomic Momentum Transfer Experiments " In a recent Letter, Latka and West [1] claim that quantum suppression of atomic momentum transfer seen in recent experiments [2] is not due to dynamical localization (DL). We contend that their arguments proceed from a misunderstanding of both DL as well as aspects of the experiment. This is compounded by erro...

Quantum theory of longitudinal momentum transfer in above-threshold ionization