Josephson squelch filter for quantum nanocircuits

被引：3

作者：

Forn-Diaz, P. ^{[1
]}

Schouten, R. N. ^{[1
]}

den Braver, W. A. ^{[1
]}

Mooij, J. E. ^{[1
]}

Harmans, C. J. P. M. ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, Quantum Transport Grp, NL-2628 CJ Delft, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 04期

关键词：

copper; nanotechnology; power filters; quantum dots; superconducting junction devices;

D O I：

10.1063/1.3186047

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We fabricated and tested a squelch circuit consisting of a copper powder filter with an embedded Josephson junction connected to ground. For small signals (squelch ON), the small junction inductance attenuates strongly from dc to at least 1 GHz, while for higher frequencies dissipation in the copper powder increases the attenuation exponentially with frequency. For large signals (squelch OFF), the circuit behaves as a regular metal powder filter. The measured ON/OFF ratio is larger than 50 dB up to 50 MHz. This squelch can be applied in low temperature measurement and control circuitry for quantum nanostructures, such as superconducting qubits and quantum dots.

引用

页数：3

共 9 条

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