Audio / Video

The Tiniest Perfect-Liquid Droplets

  • 00:45:08


The quark-gluon plasma (QGP) produced in ultra-relativistic collisions between large nuclei, such as Au+Au or Pb+Pb, is a state of nuclear matter with extremely high temperature and energy density. The particles produced in these collisions exhibit collective behavior that indicate that QGP is a liquid with extremely low specific viscosity, which makes it the most perfect liquid in nature. In the quest of understanding how the perfect fluid emerges, experiments at the Large Hadron Collider (CERN, Switzerland) and the Relativistic Heavy Ion Collider (BNL) studied collisions between protons or other small nuclei with large nuclei, which were not expected to produce QGP. To our surprise, we found that collective behavior is also present in a fraction of these collisions, i.e. — the most violent ones that produce a large number of particles. How small can a system be and still behave as a liquid? This talk will focus on the world’s tiniest perfect-liquid droplets.



The Tiniest Perfect-Liquid Droplets


University of California, Berkeley. Dept. of Physics


Berkeley, CA, University of California, Berkeley, Dept. of Physics, January 23, 2017

Full Collection Name

Physics Colloquia






1 streaming video file

Other Physical Details

digital, sd., col.


Physics Library


Recorded at a colloquium held on January 23, 2017, sponsored by the Dept. of Physics, University of California, Berkeley.

originally produced as an .mts file in 2017

Speakers: Julia Velkovska.

Usage Statement

Researchers may make free and open use of the UC Berkeley Library’s digitized public domain materials. However, some materials in our online collections may be protected by U.S. copyright law (Title 17, U.S.C.). Use or reproduction of materials protected by copyright beyond that allowed by fair use (Title 17, U.S.C. § 107) requires permission from the copyright owners. The use or reproduction of some materials may also be restricted by terms of University of California gift or purchase agreements, privacy and publicity rights, or trademark law. Responsibility for determining rights status and permissibility of any use or reproduction rests exclusively with the researcher. To learn more or make inquiries, please see our permissions policies (


Physics Colloquia


colloquia/1-23-17Velkovska.mp4 00:45:08

Linked Resources

View record in Digital Collections.