Fast generating W state of three superconducting qubits via Lewis–Riesenfeld invariants  

作　　者：于琳 徐晶 吴金雷 计新 

机构地区：[1]Department of Physics, College of Science, Yanbian University, Yanji 133002, China

出　　处：《Chinese Physics B》2017年第6期47-52,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11464046)

摘　　要：We propose a scheme for a fast generating three-qubit W state in a superconducting system by using a technique of shortcuts to adiabaticity, Lewis–Riesenfeld invariants. Three identical superconducting qubits（SQs） are connected by two coplanar waveguide resonators（CPWRs） capacitively. Under a certain limit condition, we convert the complicated SQ system into a simple three-state system. By designing experimentally accessible harmonic pulses, a three-SQ W state is implemented with quite short operation time and high fidelity. Numerical simulations prove that the scheme is robust against the parameter deviation. In addition, we also give detailed discussion about the scheme robustness against decoherence.We propose a scheme for a fast generating three-qubit W state in a superconducting system by using a technique of shortcuts to adiabaticity, Lewis–Riesenfeld invariants. Three identical superconducting qubits（SQs） are connected by two coplanar waveguide resonators（CPWRs） capacitively. Under a certain limit condition, we convert the complicated SQ system into a simple three-state system. By designing experimentally accessible harmonic pulses, a three-SQ W state is implemented with quite short operation time and high fidelity. Numerical simulations prove that the scheme is robust against the parameter deviation. In addition, we also give detailed discussion about the scheme robustness against decoherence.

关 键 词：W state superconducting qubits shortcuts to adiabaticity 

分 类 号：O413[理学—理论物理]