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12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Antiresonance phase shift in strongly coupled cavity QED.
C Sames1, H Chibani1, C Hamsen1
1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany.
Physical Review Letters
|March 4, 2014
Summary
We observed a large, optically controllable phase shift in single-atom cavity quantum electrodynamics. This finding offers a new method for characterizing integrated quantum circuits.
Area of Science:
- Quantum Physics
- Cavity Quantum Electrodynamics (CQED)
Background:
- Single-atom cavity quantum electrodynamics (CQED) is crucial for quantum technologies.
- Understanding light-matter interactions in the strong coupling regime is essential.
Purpose of the Study:
- To investigate phase shifts in the strong coupling regime of single-atom CQED.
- To explore the properties and controllability of these phase shifts.
Main Methods:
- Observing phase shifts on light transmitted through a single-atom CQED system.
- Analyzing the frequency and width dependence of the phase shift on system parameters.
Main Results:
- A significant phase shift associated with an antiresonance was observed.
- The phase shift's frequency and width were found to depend solely on the atom, not the cavity.
- An optically controllable phase shift of 140°, the largest for a single emitter, was achieved.
Conclusions:
- The observed phase shift is a robust phenomenon, controllable via optical means.
- This provides a novel technique for characterizing complex integrated quantum circuits.
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