Quantum Spin Stabilized Magnetic Levitation

Physical Review Letters
C C RusconiO Romero-Isart

Abstract

We theoretically show that, despite Earnshaw's theorem, a nonrotating single magnetic domain nanoparticle can be stably levitated in an external static magnetic field. The stabilization relies on the quantum spin origin of magnetization, namely, the gyromagnetic effect. We predict the existence of two stable phases related to the Einstein-de Haas effect and the Larmor precession. At a stable point, we derive a quadratic Hamiltonian that describes the quantum fluctuations of the degrees of freedom of the system. We show that, in the absence of thermal fluctuations, the quantum state of the nanomagnet at the equilibrium point contains entanglement and squeezing.

References

Apr 30, 2016·Nature Communications·Marc GanzhornWolfgang Wernsdorfer

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Citations

Mar 28, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jasmina Jeknić-DugićMiroljub Dugić
Nov 6, 2018·Physical Review Letters·Y B BandAlexander Shnirman
Mar 24, 2020·Physical Review Letters·Carlos Gonzalez-BallesteroOriol Romero-Isart
May 10, 2020·Physical Review Letters·J GieselerM D Lukin
Jul 3, 2021·Micromachines·Maxime PerdriatGabriel Hétet
Aug 31, 2021·Physical Review Letters·Andrea VinanteHendrik Ulbricht
Oct 8, 2021·Science·C Gonzalez-BallesteroO Romero-Isart

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