A new way to form Bose-Einstein Condensate is discovered

16.04.2020

A surprisingly effective way to create an elusive quantum state of matter, called a Bose-Einstein condensate (BEC), was proposed and verified experimentally using magnons as modelling bosonic particles

Jointly with colleagues from Germany and the USA, we created the Bose-Einstein condensate through a sudden change in temperature: first heating the magnons up slowly, then rapidly cooling them down back to room temperature. As a result, the magnonic system got over-populated and formed a spontaneous magnon condensation into the same quantum state. BEC was directly detected using an optical spectroscopy technique.

The new method, published in Nature Nanotechnology is genuine to any solid-state quasi-particles in exchange with the phonon bath and paves the way for the usage of macroscopic quantum magnon states in conventional spintronics.

You can read the full press release HERE.

Bose-Einstein condensation of quasi-particles by rapid cooling
M. Schneider, T. Brächer, D. Breitbach, V. Lauer, P. Pirro, D. A. Bozhko, H. Yu. Musiienko-Shmarova, B. Heinz, Q. Wang, T. Meyer, F. Heussner, S. Keller, E. Th. Papaioannou, B. Lägel, T. Löber, C. Dubs, A. N. Slavin, V. S. Tiberkevich, A. A. Serga, B. Hillebrands, and A. V. Chumak
Nat. Nanotechnol. 15, 457–461(2020)

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