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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Deterministic generation of multiparticle entanglement by quantum Zeno dynamics.
Giovanni Barontini1, Leander Hohmann1, Florian Haas1
1Laboratoire Kastler Brossel, École Normale Supérieure, Université Pierre et Marie Curie Paris 6, CNRS, Collège de France, 24 rue Lhomond, 75005 Paris, France.
Science (New York, N.Y.)
|September 19, 2015
Summary
Quantum Zeno dynamics (QZD) deterministically generate multiparticle entangled states in 36 qubit atoms using nondestructive measurement. This fast method offers a versatile tool for quantum engineering applications.
Area of Science:
- Quantum physics
- Atomic physics
- Quantum information science
Background:
- Multiparticle entangled quantum states are crucial for quantum-enhanced metrology and computing.
- Traditional methods rely solely on coherent operations for entanglement generation.
- Environmental coupling can lead to novel quantum dynamics for state generation.
Purpose of the Study:
- To deterministically generate multiparticle entangled states using quantum Zeno dynamics (QZD).
- To explore the use of nondestructive measurement in an optical microcavity for entanglement generation.
- To characterize the generated states and study the influence of measurement strength.
Main Methods:
- Utilized quantum Zeno dynamics (QZD) with an optical microcavity.
- Employed nondestructive measurement on an ensemble of 36 qubit atoms.
- Performed quantum state tomography for characterization and entanglement depth quantification.
Main Results:
- Successfully generated different multiparticle entangled states deterministically in under 5 microseconds.
- Provided a time-resolved account of entanglement generation through quantum tomography.
- Investigated the relationship between measurement strength and quantum state properties, including entanglement depth.
Conclusions:
- Quantum Zeno dynamics (QZD) provide a versatile and efficient method for fast, deterministic entanglement generation.
- This technique is suitable for various quantum engineering applications requiring multiparticle entangled states.
- Nondestructive measurement in optical microcavities is a key enabler for QZD-based entanglement.
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