Violating Bell's inequality with remotely-connected superconducting qubits
| Autor: | David Schuster, G. A. Peairs, Etienne Dumur, Youpeng Zhong, Kevin J. Satzinger, Andrew Cleland, Audrey Bienfait, Christopher Conner, Ming-Han Chou, Hung-Shen Chang, Joel Grebel, Rhys Povey |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Quantum Physics TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES Quantum correlation Measure (physics) General Physics and Astronomy FOS: Physical sciences TheoryofComputation_GENERAL Quantum channel Quantum entanglement Topology 01 natural sciences 010305 fluids & plasmas Bell's theorem Qubit 0103 physical sciences 010306 general physics Quantum information science Quantum Physics (quant-ph) Quantum |
| Popis: | Quantum communication relies on the efficient generation of entanglement between remote quantum nodes, as entanglement is required to achieve and verify secure communications1. Remote entanglement has been realized using a number of different probabilistic schemes2,3, but deterministic remote entanglement has only been demonstrated recently, using a variety of superconducting circuit approaches4–6. However, the deterministic violation of a Bell inequality7, a strong measure of quantum correlation, has not been demonstrated so far in a superconducting quantum communication architecture, in part because achieving sufficiently strong correlation requires fast and accurate control of the emission and capture of the entangling photons. Here, we present a simple and robust architecture for achieving this benchmark result in a superconducting system. A deterministic violation of the Bell inequality is reported between two superconducting circuits, providing a necessary test for establishing strong enough quantum entanglement to achieve secure quantum communications. |
| Databáze: | OpenAIRE |
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