Topological lattices realized in superconducting circuit optomechanics

Abstract

Cavity optomechanics enables controlling mechanical motion via radiation pressure interaction, and has contributed to the quantum control of engineered mechanical systems ranging from kg scale LIGO mirrors to nano-mechanical systems, enabling ground-state preparation, entanglement, squeezing of mechanical objects, position measurements at the standard quantum limit and quantum transduction. Yet, nearly all prior schemes have employed single- or few-mode optomechanical systems. In contrast, novel dynamics and applications are expected when utilizing optomechanical lattices, which enable to synthesize non-trivial band structures, and have been actively studied in the field of circuit QED. Superconducting microwave optomechanical circuits 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 1D circuit optomechanical chains realizing the Su-Schrieffer-Heeger (SSH) model. Furthermore, we realize the strained graphene model in a 2D 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. 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, offers an avenue to explore collective, quantum many-body, and quench dynamics, topological properties and more broadly, emergent nonlinear dynamics in complex optomechanical systems with a large number of degrees of freedoms. (Keywords: Quantum Optomechanics, Superconducting Circuit Electromecahnics)

Updated version with Methods and SI

References in corpus (8)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Optomechanically induced transparency
• Topological Acoustics
• A tight-binding approach to uniaxial strain in graphene
• Nanomechanical motion measured with precision beyond the standard quantum limit
• State Transfer Between a Mechanical Oscillator and Microwave Fields in the Quantum Regime
• Reservoir engineering and dynamical phase transitions in optomechanical arrays
• Nonreciprocal topological phononics in optomechanical arrays

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• Instabilities near ultrastrong coupling in microwave optomechanical cavity
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• Manipulating Topological Polaritons in Optomechanical Ladders
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