185 citations · 887 across the 16 of their papers we have counts for
17 papers
Optomechanical Self-Stability of Freestanding Photonic Metasurfaces
Avinash Kumar, Daniel Kindem, Ognjen Ilic
We develop an analytical framework for self-stabilizing optical manipulation of freestanding metasurfaces in three dimensions. Our framework reveals that the challenging problem of…
Anomalous heating in a colloidal system
Avinash Kumar, Raphael Chetrite, John Bechhoefer
We report anomalous heating in a colloidal system, the first observation of the inverse Mpemba effect, where an initially cold system heats up faster than an identical warm system…
A versatile ring trap for quantum gases
Mathieu de Goër de Herve, Yanliang Guo, Camilla de Rossi +5
We report on the confinement of a Bose-Einstein condensate in an annular trap with widely tunable parameters. The trap relies on a combination of magnetic, optical and radio-freque…
The metastable Mpemba effect corresponds to a non-monotonic temperature dependence of extractable work
Raphaël Chétrite, Avinash Kumar, John Bechhoefer
The Mpemba effect refers to systems whose thermal relaxation time is a non-monotonic function of the initial temperature. Thus, a system that is initially hot cools to a bath tempe…
Exponentially faster cooling in a colloidal system
Avinash Kumar, John Bechhoefer
As the temperature of a cooling object decreases as it relaxes to thermal equilibrium, it is intuitively assumed that a hot object should take longer to cool than a warm one. Yet,…
Supersonic rotation of a superfluid: a long-lived dynamical ring
Yanliang Guo, Romain Dubessy, Mathieu de Goër de Herve +5
We present the experimental realization of a long-lived superfluid flow of a quantum gas rotating in an anharmonic potential, sustained by its own angular momentum. The gas is set…