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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Robust and efficient generator of almost maximal multipartite entanglement
Davide Rossini1, Giuliano Benenti
1NEST-CNR-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy.
Physical Review Letters
|March 21, 2008
Summary
Quantum chaotic maps create highly entangled states. This multipartite entanglement remains robust against realistic noise, degrading only polynomially with qubit number.
Area of Science:
- Quantum Information Science
- Quantum Computing
- Quantum Chaos
Background:
- Quantum chaotic maps are known for generating pseudorandom quantum states.
- These states can exhibit a high degree of multipartite entanglement.
- Characterizing multipartite entanglement across all system bipartitions is crucial.
Purpose of the Study:
- To investigate the robustness of multipartite entanglement generated by quantum chaotic maps.
- To analyze the impact of realistic noise on distillable entanglement in these states.
- To determine the scaling of entanglement degradation with increasing noise and qubit number.
Main Methods:
- Utilizing quantum chaotic maps to generate pseudorandom states.
- Analyzing the probability distribution of bipartite entanglement across all possible bipartitions.
- Introducing realistic noise models to simulate environmental interactions.
- Quantifying distillable entanglement under noisy conditions.
Main Results:
- Quantum chaotic maps generate states with nearly maximal multipartite entanglement.
- The generated multipartite entanglement demonstrates significant robustness against realistic noise.
- Distillable entanglement degrades polynomially with the number of qubits, not exponentially.
- This polynomial drop indicates resilience up to substantial noise levels.
Conclusions:
- Quantum chaotic maps offer a viable pathway to creating robust, highly entangled quantum states.
- The resilience of multipartite entanglement to noise is a key feature for practical quantum information processing.
- The polynomial scaling of entanglement decay suggests potential applications in noisy quantum systems.
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