Observing the quantum limit of an electron cyclotron: QND measurements of quantum jumps between Fock states

被引：140

作者：

Peil, S ^{[1
]}

Gabrielse, G ^{[1
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.83.1287

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum jumps between Fock states of a one-electron oscillator reveal the quantum limit of a cyclotron. With a surrounding cavity inhibiting synchrotron radiation 140-fold, the jumps show a 13 s Fock state lifetime and a cyclotron in thermal equilibrium with 1.6 to 4.2 K blackbody photons. These disappear by 80 mK, a temperature 50 times lower than previously achieved with an isolated elementary particle. The cyclotron stays in its ground state until a resonant photon is injected. A quantum cyclotron offers a new route to measuring the electron magnetic moment and the fine structure constant.

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页码：1287 / 1290

页数：4

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