Topological energy transfer in an optomechanical system with exceptional points

By Haitan Xu, D. Mason, Luyao Jiang, J. Harris. Nature, 2016

941 citations recorded by the source corpus.

Topological operations can achieve certain goals without requiring accurate control over local operational details; for example, they have been used to control geometric phases and have been proposed as a way of controlling the state of certain systems within their degenerate subspaces. More recently, it was predicted that topological operations can be used to transfer energy between normal modes, provided that the system possesses a specific type of degeneracy known as an exceptional point. Here we demonstrate the transfer of energy between two vibrational modes of a cryogenic optomechanical device using topological operations. We show that this transfer arises from the presence of an exceptional point in the spectrum of the device. We also show that this transfer is non-reciprocal. These results open up new directions in system control; they also open up the possibility of exploring other dynamical effects related to exceptional points, including the behaviour of thermal and quantum fluctuations in their vicinity.

Subfields: Atomic and Molecular Physics, and Optics, Cellular and Molecular Neuroscience, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/237de233a9221b22af5244e346838b65c9fe666d

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Symmetry and Topology in Non-Hermitian Physics (2018, background): “Examples include power oscillations [40,74], unidirectional invisibility [48,74,75,77], high-performance lasers [46,47,51,59,78–80,84], exceptional-point encirclement [82,86,87,95], and enhanced sensitivity [50,58,67, 90,91].”
Perspective on topological states of non-Hermitian lattices (2019, background): “fascinating experiments with microwaves [40, 41, 42, 73, 43, 74, 72], optical waveguides [75], nuclear magnetic resonance [76], and also in optomechanical systems [77].”
Dynamically Encircling Exceptional Points: In situ Control of Encircling Loops and the Role of the Starting Point (2018, background): “It was not until recently that the dynamical encircling of an EP was realized experimentally in microwave [35] and optomechanical systems [36].”