Simulation of quantum field theory and gravity in superfluid ³He

• Published in: Физика низких температур
• Date: 1998
• Main Author: Volovik, G.E.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 1998
• Subjects: Специальный выпуск International Workshop on Low Temperature Microgravity Physics
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/176405
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Simulation of quantum field theory and gravity in superfluid ³He / G.E. Volovik // Физика низких температур. — 1998. — Т. 24, № 2. — С. 172-175. — Бібліогр.: 21 назв. — англ.

Superfluid phases of ³He are quantum liquids with the interacting fermionic and bosonic fields. In
 many respects they can simulate the interacting quantum fields in the physical vacuum. One can observe
 analogs of such phenomena as axial anomaly, vacuum polarization, zero-charge effect, termionic charge
 of the vacuum, baryogenesis, ergoregion, vacuum instability, etc. We discuss some topics using as an
 example several linear defects in ³He-A: (1) disgyration, which simulates the extremely massive cosmic
 string, (2) singular vortex, which is analogous to the spinning cosmic string, and (3) continuous vortex,
 whose motion causes the «momentogenesis» which is the analog of baryogenesis in early Universe. The
 production of the fermionic momentum by the vortex motion (the counterpart of the electroweak
 baryogenesis) has been recently measured in Manchester experiments on rotating superfluid ³He-A and
 ³He-B. To simulate the other phenomena, one needs a rather low temperature and high homogeneity,
 which probably can be attained under microgravity conditions.