Séminaire du LPTMS : Mikhail Zvonarev

Quantum motion of an impurity through a medium at zero temperature in one spatial dimension

Mikhail Zvonarev (LPTMS, Université Paris-Sud)

I will report on a theoretical and experimental progress in understanding the dynamics of an impurity injected into a one-dimensional quantum liquid. I will show that the momentum distribution of the impurity subject to a constant external force exhibits characteristic Bragg reflections at the edge of an emergent Brillouin zone. As a consequence, the impurity exhibits periodic dynamics that is interpreted as Bloch oscillations, which arise even though the quantum liquid is translationally invariant. I will also discuss a quantum flutter phenomenon, whose essence is that the impurity injected into a liquid with some initial momentum sheds only a part of it to the background gas, and forms a correlated state that no longer decays in time; furthermore, if the initial momentum is large enough, the impurity undergoes long-lived oscillations.

 


Date/Time : 11/10/2016 - 11:00 - 12:00

Location : LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay

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