Experimental investigation of partially entangled states for device-independent randomness generation and self-testing protocols
| Autor: | O. Jiménez Farías, S. Gómez, Gustavo Lima, Esteban S. Gómez, Antonio Acín, I. Machuca, Alejandro Máttar, Daniel Cavalcanti |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics business.industry Small deviations FOS: Physical sciences TheoryofComputation_GENERAL Quantum entanglement Quantum information processing 01 natural sciences 010305 fluids & plasmas Testing protocols Qubit 0103 physical sciences Statistical physics Photonics 010306 general physics business Quantum Physics (quant-ph) Randomness Intuition |
| Popis: | Previous theoretical works showed that all pure two-qubit entangled states can generate one bit of local randomness and can be self-tested through the violation of proper Bell inequalities. We report an experiment in which nearly pure partially entangled states of photonic qubits are produced to investigate these tasks in a practical scenario. We show that small deviations from the ideal situation make low entangled states impractical to self-testing and randomness generation using the available techniques. Our results show that in practice lower entanglement implies lower randomness generation, recovering the intuition that maximally entangled states are better candidates for deviceindependent quantum information processing. 7 pags, 5 figs. Accepted by PRA |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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