Projection noise in the optically detected magnetic resonance signal of a single electron spin.
The spin quantum noise owing to a single molecular triplet electron spin jumping from one eigenstate to another has been detected. As a result of the superposition of two spin eigenstates in the triplet level of the molecule by a microwave pi/2-pulse an increase in the noise of the fluorescence intensity of a single molecule is detected. This increase in noise is attributed to the decay of coherence between the two spin eigenstates.
Wrachtrup
J
J
TU Chemnitz, Inst. of Physics, Germany.
Gruber
A
A
D004583:Electrons; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008872:Microwaves; D008962:Models, Theoretical; D055095:Optics and Photonics; D011789:Quantum Theory; D013050:Spectrometry, Fluorescence