Single-particle momentum distribution of an Efimov trimer

Single-Particle Momentum Distribution of an Efimov trimer

Evidence for universal four-body states tied to an Efimov trimer.

We report on the measurement of four-body recombination rate coefficients in an atomic gas. Our results obtained with an ultracold sample of cesium atoms at negative scattering lengths show a resonant enhancement of losses and provide strong evidence for the existence of a pair of four-body states, which is strictly connected to Efimov trimers via universal relations. Our findings confirm recen...

An angular momentum conserving affine-particle-in-cell method

We present a new technique for transferring momentum and velocity between particles and grid with ParticleIn-Cell (PIC) [1] calculations which we call Affine-Particle-In-Cell (APIC). APIC represents particle velocities as locally affine, rather than locally constant as in traditional PIC. We show that this representation allows APIC to conserve linear and angular momentum across transfers while...

Reaction and particle distribution in networks of single-file systems

– A quadratic network of mutually intersecting channels with single-file confinement is considered as a host system for molecules A undergoing a unidirectional reaction A → B in the channel intersections. If each of the two sets of perpendicular channels is able to accommodate only one of the two types of molecular species, the overall particle concentration deviates significantly from being ho...

One-particle density matrix and momentum distribution function of one-dimensional anyon gases

We present a systematic study of the Green functions of a onedimensional gas of impenetrable anyons. We show that the one-particle density matrix is the determinant of a Toeplitz matrix whose large N asymptotic is given by the Fisher-Hartwig conjecture. We provide a careful numerical analysis of this determinant for general values of the anyonic parameter, showing in full details the crossover ...