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Generating Squeezed States of Nanomechanical Resonator via a Flux Qubit in a Hybrid System

王朝全, 邹健, 张智明

Chinese Physics LettersJan 1, 20160 citations

Controllable Coupling between Flux Qubit and Nanomechanical Resonator

Ying-Dan Wang, Fei Xue, Chang-Pu Sun +3 more

Bulletin of the American Physical SocietyMar 7, 20070 citations

One-step generation of cluster states in multiple flux qubits coupled with a nanomechanical resonator

Feng‐Yang Zhang, Pei Pei, Chong Li +1 more

Physica B Condensed MatterMay 8, 20103 citations

Probe absorption characteristics and a tunable susceptibility switch of a superconducting flux qubit coupled to two mechanical resonators

Qinghong Liao, Haiyan Qiu, Min Xiao +1 more

Optics & Laser TechnologyDec 9, 20226 citations

Generating Squeezed States of Nanomechanical Resonator via a Flux Qubit in a Hybrid System

Chao-Quan Wang, Zou Jian, Zhi‐Ming Zhang

We propose a scheme for generating squeezed states based on a superconducting hybrid system. Our system consists of a nanomechanical resonator, a superconducting flux qubit, and a superconducting transmission line resonator. Using our proposal, one can easily generate the squeezed states of the nanomechanical resonator. In our scheme, the nonlinear interaction between the nanomechanical resonator and the superconducting transmission line resonator can be implemented by the flux qubit as 'nonlinear media' with a tunable Josephson energy. The realization of the nonlinearity does not need any operations on the flux qubit and just needs to adiabatically keep it at the ground state, which can greatly decrease the effect of the decoherence of the flux qubit on the squeezed efficiency.We propose a scheme for generating squeezed states based on a superconducting hybrid system. Our system consists of a nanomechanical resonator, a superconducting flux qubit, and a superconducting transmission line resonator. Using our proposal, one can easily generate the squeezed states of the nanomechanical resonator. In our scheme, the nonlinear interaction between the nanomechanical resonator and the superconducting transmission line resonator can be implemented by the flux qubit as 'nonlinear media' with a tunable Josephson energy. The realization of the nonlinearity does not need any operations on the flux qubit and just needs to adiabatically keep it at the ground state, which can greatly decrease the effect of the decoherence of the flux qubit on the squeezed efficiency.

Chinese Physics LettersFeb 1, 20162 citations

Kerr nonlinearities and nonclassical states with superconducting qubits and nanomechanical resonators

F. L. Semião, K. Furuya, Gerard J Milburn

We propose the use of a superconducting charge qubit capacitively coupled to two resonant nanomechanical resonators to generate Yurke-Stoler states, i.e., quantum superpositions of pairs of distinguishable coherent states $180\ifmmode^\circ\else\textdegree\fi{}$ out of phase with each other. This is achieved by effectively implementing Kerr nonlinearities induced through the application of a strong external driving field in one of the resonators. A simple study of the effect of dissipation on our scheme is also presented and lower bounds of fidelity and purity of the generated state are calculated. Our procedure to implement a Kerr nonlinearity in this system may be used for high-precision measurements in nanomechanical resonators.We propose the use of a superconducting charge qubit capacitively coupled to two resonant nanomechanical resonators to generate Yurke-Stoler states, i.e., quantum superpositions of pairs of distinguishable coherent states $180\ifmmode^\circ\else\textdegree\fi{}$ out of phase with each other. This is achieved by effectively implementing Kerr nonlinearities induced through the application of a strong external driving field in one of the resonators. A simple study of the effect of dissipation on our scheme is also presented and lower bounds of fidelity and purity of the generated state are calculated. Our procedure to implement a Kerr nonlinearity in this system may be used for high-precision measurements in nanomechanical resonators.

arXiv:0808.0743Physical Review AJun 8, 200939 citations

Probe absorption properties and Kerr effect of a nanomechanical resonator system with a flux qubit

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