An Approach to Quantum State Pooling from Quantum Conditional Independence

Todd A. Brun, Min-Hsiu Hsieh, Christopher Perry

A measure for the compatibility of state assignments of independent observers of the same quantum system is proposed, and the possibility of arriving at a unique state assignment by pooling of information is investigated.

Christopher A. Fuchs, Rüdiger Schack

Phillip R. Dukes

Shan He, Dong Liu, Xueyang Li +9 more

The kinetic behaviors of 6p[1/2]0, 6p[3/2]2 ,and 6p[5/2]2 were examined under the ultrahigh pumped power. These processes were detected by the way of time-resolved fluorescence and ASE spectra. A theory of energy-pooling is presented under the focused condition. There are three types of energy-pooling processes. The first type is energy-pooling ionization. The obvious ionization can be observed whenever the laser prepared state is the 6p[1/2]0, 6p[3/2]2, or 6p[5/2]2 state. The second type is energy-pooling with big energy difference. The energy-pooling collision between the two 6p[1/2]0 atoms can produce one 5d[3/2]1 atom and one 6s’[1/2]0 atom when the prepared state is 6p[1/2]0. The third type is energy-pooling with small energy difference. The way of generation of five secondary 6p states is energy-pooling instead of collision relaxation.

Shan He, Junzhi Chu, Dong Liu +9 more

The kinetic processes of Xe (6p[1/2]0, 6p[3/2]2, and 6p[5/2]2) atoms under the focused condition were investigated. The atomic density of the laser prepared state significantly increases. Therefore, the probability of the energy-pooling between two high-lying atoms increases. There are three major types of the energy-pooling collisions. The first type is the energy-pooling ionization. Once the excitation laser is focused, the obvious ionization can be observed from the side window whenever the laser prepared state is 6p[1/2]0, 6p[3/2]2, or 6p[5/2]2 state. Ionization of Xe is attributed to the energy-pooling ionization or a Xe* atom reabsorbing another excitation photon. The second type is energy-pooling with big energy difference. When the 6p[1/2]0 state is the laser prepared state, the energy-pooling collision between two 6p[1/2]0 atoms can produce one 5d[3/2]1 atom and one 6s′[1/2]0 atom. The third type is energy-pooling with small energy difference. The intensities of fluorescence lines are much stronger that five secondary 6p states act as the upper states, and the rising edges of these fluorescence lines are much steeper. The primary mechanism of generating the secondary 6p atoms is energy-pooling collision instead of collision relaxation. Based on the collision probability, the rate of energy-pooling between two 6p[1/2]0 atoms is deduced (6.39 × 108 s−1). In addition, the 6s atoms also increase under the focused condition. Therefore, all the fluorescence lines are serious trailing by radiation trapping.

Gerd Niestegge