Shingo Kono | EPFL Graph Search

Shingo Kono is a postdoctoral scholar at EPFL in the group of Tobias Kippenberg at the Laboratory of Photonics and Quantum Measurements from 2021. He currently holds a Marie-Curie Individual Fellowship, working on the hybrid quantum system of electromechanical devices and superconducting quantum circuits, as well as the optical readout of superconducting qubits. He obtained his PhD at the University of Tokyo under the supervision of Yasunobu Nakamura in 2019. His PhD research was focused on quantum measurement of itinerant microwave photons using superconducting quantum circuits. Then, he joined the Superconducting Quantum Electronics group led by Yasunobu Nakamura at RIKEN, working on the application of waveguide quantum electrodynamics in superconducting circuits until 2020.

Topological lattices realized in superconducting circuit optomechanics

Andrea Bancora, Mahdi Chegnizadeh, Tobias Kippenberg, Shingo Kono, Jiahe Pan, Tatiana Vovk, Amir Youssefi

Cavity optomechanics enables the control of mechanical motion through the radiation-pressure interaction(1), and has contributed to the quantum control of engineered mechanical systems ranging from kilogramme-scale Laser Interferometer Gravitational-wave Observatory (LIGO) mirrors to nanomechanical systems, enabling ground-state preparation(2,3), entanglement(4,5), squeezing of mechanical objects(6), position measurements at the standard quantum limit(7) and quantum transduction(8). Yet nearly all previous schemes have used single- or few-mode optomechanical systems. By contrast, new dynamics and applications are expected when using optomechanical lattices(9), which enable the synthesis of non-trivial band structures, and these lattices have been actively studied in the field of circuit quantum electrodynamics(10). Superconducting microwave optomechanical circuits(2) are a promising platform to implement such lattices, but have been compounded by strict scaling limitations. Here we overcome this challenge and demonstrate topological microwave modes in one-dimensional circuit optomechanical chains realizing the Su-Schrieffer-Heeger model(11,12). Furthermore, we realize the strained graphene model(13,14) in a two-dimensional optomechanical honeycomb lattice. Exploiting the embedded optomechanical interaction, we show that it is possible to directly measure the mode functions of the hybridized modes without using any local probe(15,16). This enables us to reconstruct the full underlying lattice Hamiltonian and directly measure the existing residual disorder. Such optomechanical lattices, accompanied by the measurement techniques introduced, offer an avenue to explore collective(17,18), quantum many-body(19) and quench(20) dynamics, topological properties(9,21) and, more broadly, emergent nonlinear dynamics in complex optomechanical systems with a large number of degrees of freedom(22-24).

NATURE PORTFOLIO2022

Topological lattices realized in superconducting circuit optomechanics

Andrea Bancora, Mahdi Chegnizadeh, Tobias Kippenberg, Shingo Kono, Jiahe Pan, Tatiana Vovk, Amir Youssefi

NATURE PORTFOLIO2022