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Published on: November 11, 2013
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Triggered Superradiance and Spin Inversion Storage in a Hybrid Quantum System.
Wenzel Kersten1, Nikolaus de Zordo1, Oliver Diekmann2
1Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, A-1020 Vienna, Austria.
Physical Review Letters
|August 11, 2023
Summary
We investigated superradiant emission from spin ensembles coupled to superconducting cavities. Trigger pulses control emission timing and phase, while stored energy can amplify microwave pulses.
Area of Science:
- Quantum optics
- Condensed matter physics
- Superconducting circuits
Background:
- Superradiance involves collective emission from quantum emitters.
- Coupling spin ensembles to superconducting cavities enables novel quantum phenomena.
- Controlling spin inversion dynamics is crucial for quantum technologies.
Purpose of the Study:
- To investigate the superradiant emission dynamics of an inverted spin ensemble coupled to a superconducting cavity.
- To explore the effects of detuning and trigger pulses on superradiance.
- To examine the potential for microwave amplification using stored spin ensemble energy.
Main Methods:
- Utilizing a superconducting cavity strongly coupled to an inverted spin ensemble.
- Implementing fast spin inversion followed by detuning to store inversion.
- Applying weak trigger pulses to initiate and control superradiant emission.
- Analyzing the emission characteristics and amplification capabilities.
Main Results:
- Demonstrated controlled superradiant emission with tunable timing and phase via trigger pulses.
- Observed the disappearance of transverse spin components during detuning.
- Showcased microwave amplification of pulses by the spin ensemble below the spontaneous superradiance threshold.
- Characterized the dependence of superradiance on inversion levels and hold times.
Conclusions:
- Superradiant emission from spin ensembles in superconducting cavities can be precisely controlled.
- Stored energy in spin ensembles offers a pathway for microwave amplification.
- This system provides a platform for exploring fundamental quantum dynamics and developing quantum devices.
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