Pointlike probes of superstring-theoretic superfluids

Steven S. Gubser, Amos Yarom

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

In analogy with an experimental setup used in liquid helium, we use a pointlike probe to study superfluids which have a gravity dual. In the gravity description, the probe is represented by a hanging string. We demonstrate that there is a critical velocity below which the probe particle feels neither drag nor stochastic forces. Above this critical elocity, there is power-law scaling for the drag force, and the stochastic forces are characterized by a finite, velocity-dependent temperature. This temperature participates in two simple and general relations between the drag force and stochastic forces. The formula we derive for the critical velocity indicates that the low-energy excitations are massless, and they demonstrate the power of stringy methods in describing strongly coupled superfluids.

Original languageEnglish (US)
Article number41
JournalJournal of High Energy Physics
Volume2010
Issue number3
DOIs
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

  • Black holes in string theory
  • Gauge-gravity correspondence

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