Phys. Rev. Lett. 83, 1287–1290 (1999)Observing the Quantum Limit of an Electron Cyclotron: QND Measurements of Quantum Jumps between Fock States
See accompanying Physics Focus 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. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.1287
DOI:
10.1103/PhysRevLett.83.1287
PACS:
03.65.-w, 42.50.Ct
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