Quantum Momentum Distributions

Quantum Momentum Distributions

In classical systems, the atomic momentum distribution (AMD) is always the renowned Maxwell–Boltzmann distribution.1,2 Essentially, the atomic momentum p = k and atomic position r are independent, canonical variables and the momentum distribution n(k) is always a Gaussian independent of the interatomic or any external potential. Neutron scattering measurements3–10 have shown that n(k) for atoms...

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...

Momentum distributions for the quantum δ-kicked rotor with decoherence

We discuss the theoretical description and numerical simulation of the effect of noise and environmental coupling on the momentum distribution of the quantum δ-kicked rotor in recent atom optics experiments. We investigate the transition between exponentially localized and more nearly Gaussian momentum distributions and compare our simulations with existing experimental results.

Quantum Electrodynamics of Casimir Momentum: Momentum of the Quantum Vacuum?

Momentum-State Quantum Computer

The qubits of a quantum computer can be coded within the ladder of states of a quantum manifold or continuous variable, such as the momentum of a single cold atom [1] or the vibrational state of a trapped ion [2]. While the scaling of such systems limits their potential for quantum information processing (QIP), they are intriguing because they allow an algorithmic approach to the coherent contr...