Abstract
Quantum pumping as a dynamical probe of the superfluid response of a one-dimensional (1D) quantum fluid is discussed. It is shown that a spatially periodic potential, oscillating adiabatically in time with frequency ω0, acts as a quantum pump inducing a continuous momentum current from broken spatiotemporal symmetries of the driven potential. The momentum current generated by the pump is strongly affected by the interactions. It has a power-law dependence on the frequency and the temperature with the exponent determined by the interaction. It depends on the phase difference between two umklapp terms of the drive, providing indication for the effect of quantum phase slips on the decay of superflow. Application of the results in understanding the superfluid properties of helium confined in nanometer-size pores or of laser-cooled atoms is briefly discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
