2017/04/10 by Manoj Das, J. K. Verma, P. K. Pathak
Engineering · Physics and Astronomy · #Force Microscopy Techniques and Applications #Mechanical and Optical Resonators #Mesoscopic physics #Optoelectronics #Photonic and Optical Devices #Physics #Quantum #Quantum decoherence #Quantum mechanics #Quantum state #Qubit #Resonator #Superposition principle #Wigner distribution function #quant-ph
paper · pdf · doi:10.1103/physreva.96.033837
published as Phys. Rev. A 96, 033837 (2017) · 5 pages 4 fig
arxiv created 2017/04/10 · openalex publication_date 2017/09/21 · arxiv updated 2017/09/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose measurement-based conditional generation of the superposition of mesoscopic states of a nanomechanical resonator. We consider a two-level quantum mechanical system (qubit) coupled with a nanomechanical resonator through phonon exchange. An interaction, which produces shifts in the state of the nanomechanical resonator depending on the state of the qubit, is realized by driving the qubit through two resonant fields or a single field with controlled phase. The measurement of the state of the qubit produces superposition states of the nanomechanical resonator. We show that the quantum interference between the generated states in the superposition may lead to an arbitrary large displacement in the resonator. We also discuss decoherence of the generated states using the Wigner function.