Time-Stretched Spectroscopy by the Quantum Zeno Effect: The Case of Auger Decay

Area of Science:

• Quantum physics
• Spectroscopy
• Atomic physics

Background:

• Time-resolved spectroscopy traditionally uses faster laser pulses for shorter timescales.
• The quantum Zeno effect describes how frequent measurements can inhibit system evolution.

Purpose of the Study:

• To propose and exemplify a new spectroscopic approach by slowing down quantum dynamics.
• To explore the application of the quantum Zeno effect for extending spectroscopic timescales.

Main Methods:

• Applying the quantum Zeno effect principle through repeated measurements.
• Exemplifying the approach using the Auger process.
• Developing an explicit experimental protocol for atomic lithium.

Main Results:

• Repeated measurements were found to increase the core-hole lifetime.
• The kinetic energy distribution of Auger electrons is altered by this method.
• Entanglement formation dynamics are modified through repeated measurements.

Conclusions:

• Slowing quantum dynamics via repeated measurements offers a novel spectroscopic technique for longer timescales.
• The quantum Zeno effect provides a viable mechanism to manipulate quantum processes for spectroscopic analysis.
• The proposed method has implications for understanding and controlling electron dynamics and entanglement.