Geometric measure of mixing of quantum state

• Published in: Condensed Matter Physics
• Date: 2018
• Main Authors: Laba, H.P., Tkachuk, V.M.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2018
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/157111
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Geometric measure of mixing of quantum state / H.P. Laba, V.M. Tkachuk // Condensed Matter Physics. — 2018. — Т. 21, № 3. — С. 33003: 1–4. — Бібліогр.: 7 назв. — англ.

We define the geometric measure of mixing of quantum state as a minimal Hilbert-Schmidt distance between
 the mixed state and a set of pure states. An explicit expression for the geometric measure is obtained. It is
 interesting that this expression corresponds to the squared Euclidi...