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Updated: Jun 22, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Signal, detection and estimation using a hybrid quantum circuit
O P de Sá Neto1, M C de Oliveira2
1Coordenação de Ciências da Computação, Universidade Estadual do Piauí, Campus Professor Alexandre Alves de Oliveira, Parnaíba, Piauí, 64202-220, Brazil. olimpiopereira@phb.uespi.br.
Abstract:
We investigate a hybrid device allowing a photon-phonon coupling of a transmission line radiation (TLR) and a nanoeletromechanical system (NEMS), mediated by a superconducting qubit population imbalance. We demonstrate the derivation of an effective Hamiltonian for the strongly dispersive regime for this system. The qubit works as a quantum switch, allowing a conditioned transfer of excitations between the TLR and NEMS. We show that this regime allows the system to be employed for signal processing and force estimation. Additionally, we explore the ability of the quantum switch to generate non-classical states.
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