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[Fizinfo] Szilárd-kollokvium (kedd 14:30), Verhagen az optomechanikáról

From: Dr. Dóra Balázs <dora.balazs AT ttk.bme.hu>
To: "fizinfo AT lists.kfki.hu" <fizinfo AT lists.kfki.hu>
Subject: [Fizinfo] Szilárd-kollokvium (kedd 14:30), Verhagen az optomechanikáról
Date: Thu, 29 Oct 2026 08:11:18 +0000
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MEGHÍVÓ

a Szilárd Leó-Kollokvium előadására:

Ewold Verhagen

(AMOLF)

“Programmable optomechanical networks: from topological phononics to
nanomechanical computing"

Kivonat: Harnessing radiation pressure forces in nanoscale architectures
enables advanced control over nanomechanical vibrations in classical and
quantum regimes. We study mechanical fluctuations and transport in
optomechanical resonator networks that are fully induced and controlled
through radiation pressure drives. Time-modulated laser fields in silicon
nanophotonic cavities induce controllable ‘optical springs’ between multiple
nanomechanical modes through radiation pressure interactions. These allow
programming arbitrary linear Hamiltonians for mechanical resonator networks,
as well as Duffing-like nonlinearities. This unlocks physical phenomena that
passive bosonic networks do not show, because temporal modulation can break
time-reversal symmetry and introduce interesting non-Hermitian dynamics. We
study topological models such as the quantum Hall effect and the bosonic
Kitaev chain in our optomechanical networks. Our aim is to uncover relations
between functional performance of resonator networks - acting as sensors,
computers, or machines - and their global symmetry and topology.
Specifically, we demonstrate how nonreciprocity can boost the network’s
performance as a minimal refrigerator, how modulation can cool mechanical
modes below the traditional quantum backaction limit, and how laser-induced
nonlinearity can introduce basic computing functions in nanomechanical
networks, which operate as programmable logic gates near the thermodynamic
limit.

Helye: BME Fizikai Intézet, Fizika Tanszék
Budafoki út 8. F-épület, 2. emelet, 13-as terem

Ideje: 2026. november 3. (kedd), 14:30.
Kapunyitás 14:14-től.
Program: https://physics.ttk.bme.hu/colloquium

Minden érdeklődőt örömmel várunk!

Dóra Balázs, a BME FI képviseletében

[Fizinfo] Szilárd-kollokvium (kedd 14:30), Verhagen az optomechanikáról, Dr . Dóra Balázs, 10/29/2026