Optomechanical realization of the bosonic Kitaev chain

Autor(en)

Jesse J. Slim, Clara C. Wanjura, Matteo Brunelli, Javier del Pino, Andreas Nunnenkamp, Ewold Verhagen

Abstrakt

The fermionic Kitaev chain is a canonical model featuring topological Majorana zero modes1. We report the experimental realization of its bosonic analogue2 in a nano-optomechanical network, in which the parametric interactions induce beam-splitter coupling and two-mode squeezing among the nanomechanical modes, analogous to hopping and p-wave pairing in the fermionic case, respectively. This specific structure gives rise to a set of extraordinary phenomena in the bosonic dynamics and transport. We observe quadrature-dependent chiral amplification, exponential scaling of the gain with system size and strong sensitivity to boundary conditions. All these are linked to the unique non-Hermitian topological nature of the bosonic Kitaev chain. We probe the topological phase transition and uncover a rich dynamical phase diagram by controlling interaction phases and amplitudes. Finally, we present an experimental demonstration of an exponentially enhanced response to a small perturbation3,4. These results represent the demonstration of a new synthetic phase of matter whose bosonic dynamics do not have fermionic parallels, and we have established a powerful system for studying non-Hermitian topology and its applications for signal manipulation and sensing.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

AMOLF, University of Queensland, Max-Planck-Institut für die Physik des Lichts, Universität Basel, Eidgenössische Technische Hochschule Zürich

Journal

Nature

Band

627

Seiten

767-771

Anzahl der Seiten

5

ISSN

0028-0836

DOI

https://doi.org/10.48550/arXiv.2309.05825

Publikationsdatum

03-2024

Peer-reviewed

Ja

ÖFOS 2012

210005 Nanophotonik, 103025 Quantenmechanik

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f9c0a1f5-c69d-4efd-803b-25ee608464e4