Journal
PHYSICAL REVIEW A
Volume 89, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.89.053615
Keywords
-
Categories
Funding
- National Key Basic Research Special Foundation of China (NKBRSFC) [2011CB921502, 2012CB821305]
- National Natural Science Foundation of China (NSFC) [61227902, 61378017, 11174020, 11075176]
- Beijing Natural Science Foundation (BNSF) [2102014, 1112007]
- Starting up Foundation for Youth Teachers of Beijing Technology and Business University [QNJJ20123-19, QNJJ2012-33]
- State Education Ministry [2011D005003000012, PXM2013-014213-000013]
- Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions [CITTCD201404030]
Ask authors/readers for more resources
We investigate the drag force on a moving impurity in a spin-orbit-coupled Bose-Einstein condensate. We prove rigorously that the superfluid critical velocity is zero when the impurity moves in all directions but one, in contrast to the case of liquid helium and superconductor, where it is finite in all directions. We also find that when the impurity moves in all directions except the two special ones, the drag force has nonzero transverse component with a small velocity. When the velocity becomes large and the states of the upper band are also excited, the transverse force becomes very small due to opposite contributions of the two bands. The characteristics of the superfluid critical velocity and the transverse force are results of the order-by-disorder mechanism in spin-orbit-coupled boson systems.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available