Measurement of the intrinsic dissipation of a macroscopic system in the quantum regime

被引：28

作者：

Cosmelli, C ^{[1
]}

Carelli, P

Castellano, MG

Chiarello, F

Palazzi, GD

Leoni, R

Torrioli, G

机构：

[1] Ist Nazl Fis Nucl, Rome, Italy

[2] Univ Aquila, Dipartimento Energet, I-67040 Laquila, Italy

[3] CNR, Ist Elettron Stato Solido, I-00156 Rome, Italy

[4] Univ Rome La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.82.5357

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first measurements of the intrinsic dissipation in a macroscopic system cooled at very low temperature (35 mK) and operating in the quantum regime. The system under study is an rf SQUID with a high quality Josephson junction. Below 50 mK the tunneling probability of escape from a metastable well vs applied flux presents a series of maxima due to energy level quantization. From the shape of the tunneling probability we can evaluate the intrinsic dissipation related to the overall system as well as the coherence time related to the Rabi oscillations in a future macroscopic quantum coherence experiment.

引用

页码：5357 / 5360

页数：4

共 22 条

[1]

[Anonymous], 1982, PHYSICS APPL JOSEPHS

[2] Prospects for quantum coherent computation using superconducting electronics [J].