Josephson persistent-current qubit

被引：1142

作者：

Mooij, JE

Orlando, TP

Levitov, L

Tian, L

van der Wal, CH

Lloyd, S

机构：

[1] Delft Univ Technol, Dept Appl Phys, NL-2600 GA Delft, Netherlands

[2] Delft Univ Technol, Delft Inst Microelect & Submicron Technol, NL-2600 GA Delft, Netherlands

[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, Cambridge, MA 02139 USA

[5] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[6] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

来源：

SCIENCE | 1999年 / 285卷 / 5430期

关键词：

D O I：

10.1126/science.285.5430.1036

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A qubit was designed that can be fabricated with conventional electron beam Lithography and is suited for integration into a Large quantum computer. The qubit consists of a micrometer-sized Loop with three or four Josephson junctions; the two qubit states have persistent currents of opposite direction. Quantum superpositions of these states are obtained by pulsed microwave modulation of the enclosed magnetic flux by currents in control Lines. A superconducting flux transporter allows for controlled transfer between qubits of the flux that is generated by the persistent currents, leading to entanglement of qubit information.

引用

页码：1036 / 1039

页数：4

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