Fluxonium: Single Cooper-Pair Circuit Free of Charge Offsets

作者：Vladimir Manucharyan, Jens Koch, L. I. Glazman, Michel Devoret · 发表于：Science · 年份：2009 · DOI：10.1126/science.1175552 · 被引用次数：826 · 研究领域：Quantum Information and Cryptography、Quantum Computing Algorithms and Architecture、Quantum and electron transport phenomena

The promise of single Cooper-pair quantum circuits based on tunnel junctions for metrology and quantum information applications is severely limited by the influence of offset charges: random, slowly drifting microscopic charges inherent in many solid-state systems. By shunting a small junction with the Josephson kinetic inductance of a series array of large-capacitance tunnel junctions, thereby ensuring that all superconducting islands are connected to the circuit by at least one large junction, we have realized a new superconducting artificial atom that is totally insensitive to offset charges. Yet its energy levels manifest the anharmonic structure associated with single Cooper-pair effects, a useful component for solid-state quantum computation.