Fluxon Readout of a Superconducting Qubit

被引：48
|
作者：
Fedorov, Kirill G. [1 ,2 ,3 ]
Shcherbakova, Anastasia V. [1 ,2 ]
Wolf, Michael J. [4 ]
Beckmann, Detlef [4 ]
Ustinov, Alexey V. [1 ,2 ,3 ,5 ]
机构：
[1] Karlsruhe Inst Technol, Inst Phys, D-76131 Karlsruhe, Germany
[2] Karlsruhe Inst Technol, DFG CFN, D-76131 Karlsruhe, Germany
[3] Natl Univ Sci & Technol MISIS, Moscow 119049, Russia
[4] Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany
[5] Russian Quantum Ctr, Skolkovo 143025, Moscow Region, Russia
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 16期
关键词：
QUANTUM DYNAMICS; CIRCUITS; DESIGN;
D O I：
10.1103/PhysRevLett.112.160502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An experiment demonstrating a link between classical single-flux quantum digital logic and a superconducting quantum circuit is reported. We implement coupling between a moving Josephson vortex (fluxon) and a flux qubit by reading out of a state of the flux qubit through a frequency shift of the fluxon oscillations in an annular Josephson junction. The energy spectrum of the flux qubit is measured using this technique. The implemented hybrid scheme opens an opportunity to readout quantum states of superconducting qubits with the classical fluxon logic circuits.
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页数：5
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