Abstract
In certain circumstances, chiral (parity-violating) medium can be described hydrodynamically as a chiral fluid with microscopic quantum anomalies. Possible examples of such systems include strongly coupled quark–gluon plasma, liquid helium 3He-A, neutron stars and the Early Universe. We study first-order hydrodynamics of a chiral fluid on a vortex background and in an external magnetic field. We show that there are two previously undiscovered modes describing heat waves propagating along the vortex and magnetic field. We call them the Thermal Chiral Vortical Wave and Thermal Chiral Magnetic Wave. We also identify known gapless excitations of density (chiral vortical and chiral magnetic waves) and transverse velocity (chiral Alfvén wave). We demonstrate that the velocity of the chiral vortical wave is zero, when the full hydrodynamic framework is applied, and hence the wave is absent and the excitation reduces to the charge diffusion mode. We also comment on the frame-dependent contributions to the obtained propagation velocities.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 173-181 |
| Number of pages | 9 |
| Journal | Nuclear Physics B |
| Volume | 919 |
| DOIs | |
| State | Published - Jun 1 2017 |
Funding
We are very grateful to Misha Stephanov, Naoki Yamamoto, Ho-Ung Yee, Xin An and Maxim Chernodub for critical comments and suggestions. EM thanks John Estes and Hirosi Ooguri for the discussions of fluid gravity duality which prompted her thinking about chiral fluids. EM is particularly grateful to Dr. David and Barbara Groce for their kindness and continuous support. TK work was supported in part by the U.S. Department of Energy under Contract No. DE-FG0201ER41195. This work was done as a private venture and not in the author's capacity as an employee of the Jet Propulsion Laboratory, California Institute of Technology.
ASJC Scopus subject areas
- Nuclear and High Energy Physics