In the quantum world it is possible in principle for particles of a system to fall both left and right at the same time. Differentiating this “and” state — the quantum entanglement of particles — from the classical “or” is an experimental challenge.
The Heidelberg researchers used a gas of approximately 500 atoms at a temperature of 0.00000001 Kelvin above absolute zero. After a short time a system with a high degree of quantum entanglement emerged.
To be able to experimentally verify this “and” state and its unique quantum mechanical properties, the team had to create a large number of these atomic systems under the same conditions and with different settings of the lab setup. more> http://tinyurl.com/ncesmkj