Steady-state theory of electron drag on polariton condensates

Abstract

We present a general theory of drag on a condensate due to interactions with a moving thermal bath of non-condensate particles, adapted from previous theory of equilibration of a condensate in a trap. This theory can be used to model the polariton drag effect observed previously, in which an electric current passing through a polariton condensate gives a measurable momentum transfer to the condensate, and an effective potential energy shift.Polaritons inherently have a finite lifetime ∼ 20 − 200 ps inside a microcavity. It has been shown [22] that in the upper range of these lifetimes, polaritons can reach thermal equilibrium. In general, it is possible to observe the time evolution of a polariton condensate far from equilibrium all the way

Superfluid drag between excitonic polaritons and superconducting electron gas

“…Formation of polaritons in semiconductor quantum wells and two-dimensional transition metal dichalcogenides embedded into optical microcavities [32] allows to enhance tunability of the Bose-Fermi systems, to increase the critical temperature of Bose-Einstein condensation (BEC) and to employ polaronic effects. For instance, drag between Bose-condensed polaritons and electrons in normal state, both located in the same layer, was observed [33] and theoretically explained [34].…”

Superfluid drag between excitonic polaritons and superconducting electron gas

“…Fig. 8 shows the comparison of the leading-order condensate contribution F p (16) to the rectification function with the subleading noncondensate one F p (34). Since the main contribution to the integral in Eq.…”

“…Formation of polaritons in semiconductor quantum wells and two-dimensional transition metal dichalcogenides embedded into optical microcavities [32] allows to enhance tunability of the Bose-Fermi systems, to increase the critical temperature of Bose-Einstein condensation (BEC) and to employ polaronic effects. For instance, drag between Bose-condensed polaritons and electrons in normal state, both located in the same layer, was observed [33] and theoretically explained [34]. dimensional electron gas (2DEG) undergo Cooper pairing due to exchange of virtual Bogoliubov excitations in BEC of excitonic polaritons.…”