# s-phys: "entanglement entropy of a qubit", the begin ...

<< All systems are fundamentally quantum systems (..) but the means of describing in a quantum sense the chaotic behavior of, say, air molecules in an evacuated room, remains limited >>

<< To investigate, [AA] devised an experiment using three quantum bits, the basic computational units of the quantum computer >>

<< By manipulating these qubits with electronic pulses, [AA] caused them to interact, rotate and evolve in the quantum analog of a highly sensitive classical [chaotic] system >>

<< The result is a map of entanglement entropy of a qubit that, over time, comes to strongly resemble that of classical dynamics — the regions of entanglement in the quantum map resemble the regions of chaos on the classical map >>

Sonia Fernandez. Researchers at UCSB blur the line between classical and quantum physics by connecting chaos and entanglement.  Monday, July 11, 2016

http://www.news.ucsb.edu/2016/017014/entanglement-chaos

C. Neill, P. Roushan, et al.  Ergodic dynamics and thermalization in an isolated quantum system. Nature Physics (2016) DOI: doi:10.1038/nphys3830. Published online 11 July 2016

http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys3830.html