Nonlinear quantum logic with colliding graphene plasmons

Autor(en)

Giuseppe Calajó, Philipp K. Jenke, Lee A. Rozema, Philip Walther, Darrick E. Chang, Joel D. Cox

Abstrakt

Graphene has emerged as a promising platform to bring nonlinear quantum optics to the nanoscale, where a large intrinsic optical nonlinearity enables long-lived and actively tunable plasmon polaritons to strongly interact. Here we theoretically study the collision between two counter-propagating plasmons in a graphene nanoribbon, where transversal subwavelength confinement endows propagating plasmons with a flat band dispersion that enhances their interaction. This scenario presents interesting possibilities towards the implementation of multimode polaritonic gates that circumvent limitations imposed by the Shapiro no-go theorem for photonic gates in nonlinear optical fibers. As a paradigmatic example we demonstrate the feasibility of a high-fidelity conditional π phase shift (CZ), where the gate performance is fundamentally limited only by the single-plasmon lifetime. These results open exciting avenues towards quantum information and many-body applications with strongly interacting polaritons.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Barcelona Institute of Science & Technology, Istituto Nazionale di Fisica Nucleare (INFN), Roma, Institució Catalana de Recerca i Estudis Avançats (ICREA), University of Southern Denmark (SDU)

Journal

Physical Review Research

Band

5

Anzahl der Seiten

12

ISSN

2643-1564

DOI

https://doi.org/10.1103/PhysRevResearch.5.013188

Publikationsdatum

03-2023

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik, 103021 Optik

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/05c5f197-ee91-419a-ab51-30deac170f32