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Updated: Apr 12, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Time-reversal-symmetric single-photon wave packets for free-space quantum communication
N Trautmann1, G Alber1, G S Agarwal2
1Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
Physical Review Letters
|May 16, 2015
Summary
This study introduces new methods for efficient quantum state transfer between matter qubits and photonic qubits. These techniques enable high-fidelity, on-demand quantum communication without specialized optical equipment.
Area of Science:
- Quantum Information Science
- Atomic, Molecular, and Optical Physics
Background:
- Quantum state transfer is crucial for quantum computing and communication.
- Efficiently transferring quantum states between different physical systems remains a challenge.
Purpose of the Study:
- To propose novel readout and retrieval processes for high-fidelity quantum state transfer.
- To enable efficient quantum communication protocols in free space.
Main Methods:
- Utilizing stimulated Raman adiabatic passage to control spontaneous photon emission and absorption.
- Encoding matter qubits in atomic/ionic level structures and photonic qubits in single-photon wave packets.
Main Results:
- Demonstrated efficient, high-fidelity quantum state transfer between matter and photonic qubits.
- Developed on-demand control over photon emission and absorption.
Conclusions:
- The proposed methods offer a promising approach for building blocks in free-space quantum communication.
- Eliminates the need for high-finesse cavities or optical fibers for quantum state transfer.
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