An Early Long-Distance Quantum Experiment

Serge Kernbach, Vitaliy Zamsha, Yuri Kravchenko

This work describes performed experiments on device-device and ope¬rator-device interactions at distances of >1 km, >100 km and >10000 km. Experimental setup involves several types of receiving sensors and transmitting optical generators as well as a group of human operators. We analyzed the structure of setup, establishing a connection between receiver and emitter, and multiple effects appeared. The experiments suggest a common character of operator- and device- interactions that point to possible ’neuro-quantum mechanisms’ underling both systems. This approach replicates and extends early experiments from 80x and 90x, and can be considered as a novel unconventional communication system.

I-Kang Liu, J Dziarmaga, S-C. Gou +2 more

The dynamical evolution of an inhomogeneous ultracold atomic gas quenched at different controllable rates through the Bose-Einstein condensation phase transition is studied numerically in the premise of a recent experiment in an anisotropic harmonic trap. Our findings based on the stochastic (projected) Gross-Pitaevskii equation are shown to be consistent at early times with the predictions of the homogeneous Kibble-Zurek mechanism. This is demonstrated by collapsing the early dynamical evolution of densities, spectral functions and correlation lengths for different quench rates, based on an appropriate characterization of the distance to criticality felt by the quenched system. The subsequent long-time evolution, beyond the identified dynamical critical region, is also investigated by looking at the behavior of the density wavefront evolution and the corresponding phase ordering dynamics.

J. Marijan, Helmut Strobel, Markus K. Oberthaler +1 more

We investigate entropy transport for universal scaling phenomena in closed quantum many-body systems far from equilibrium. From spatially resolved experimental data of a spinor Bose gas, we demonstrate that entropy decreases on long-distance scales while it increases at short distances. A dynamical separation of scales leads to macrophysics with long-range order, which is insensitive to the highly entropic microphysical processes. Since the total von Neumann entropy is conserved on a fundamental level for the quantum system, our analysis reveals a reciprocal connection between the emergence of macroscopic structure and microscopic disorder. To illustrate the scope of this connection, we exemplify the universal phenomenon also in a relativistic quantum field theory calculation from first principles, which is relevant for particle physics and early-universe cosmology.

A.L. Stanford, J.M. Tanner