Observation of Sub-Fourier Resonances in a Quantum-Chaotic System
Observation of Sub-Fourier Resonances in a Quantum-Chaotic System
We experimentally show that the response of a quantum-chaotic system can display resonance lines sharper than the inverse of the excitation duration. This allows us to discriminate two neighboring frequencies with a resolution nearly 40 times better than the limit set by the Fourier inequality. Furthermore, numerical studies indicate that …