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Carving Complex Many-Atom Entangled States by Single-Photon Detection.

Wenlan Chen¹, Jiazhong Hu¹, Yiheng Duan¹

¹Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Physical Review Letters

|January 2, 2016

Summary

This summary is machine-generated.

Scientists developed a new method using single photon detection to create complex entangled atomic states. This technique offers high fidelity and success rates with current technology for quantum applications.

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Area of Science:

Quantum optics
Atomic physics
Quantum information science

Background:

Generating complex entangled states in atomic ensembles is crucial for quantum computing and simulation.
Previous methods often require complex experimental setups or suffer from low fidelity.

Purpose of the Study:

To propose a versatile and efficient method for generating broad classes of complex entangled atomic states.
To leverage atom-light interactions within optical cavities for quantum state preparation.

Main Methods:

Utilizing a strongly coupled optical cavity containing an atomic ensemble.
Illuminating the ensemble with weak light to entangle photon frequency with atomic spin.
Employing time-resolved single photon detection to project the ensemble into a desired entangled state.

Main Results:

Demonstrated a method for generating complex entangled states, including mesoscopic superposition states.
Achieved high success probability per trial and high fidelity in state generation.
The method is implementable with existing experimental technology.

Conclusions:

The proposed single-photon detection method provides an efficient route to complex atomic entanglement.
This technique has significant potential for advancing quantum information processing and fundamental physics research.