期刊
PHYSICAL REVIEW A
卷 81, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.81.052106
关键词
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资金
- NSERC
- iCORE
- SAIT
- GDC
- CFI
- AAET
- QuantumWorks
- NATEQ
- AIF
- CIPI
We experimentally demonstrate that the nonlocal nature of time-bin entangled photonic qubits persists when one or two qubits of the pair are converted to polarization qubits. This is possible by implementing a universal time-bin qubit analyzer (UTBA), which allows the analysis of time-bin qubits in any basis. We reveal the nonlocal nature of the emitted light by violating the Clauser-Horne-Shimony-Holt inequality with measurement bases exploring all the dimensions of the Bloch sphere. Moreover, we conduct experiments where one qubit is transmitted over a 12.4 km underground fiber link and demonstrate the suitability of our scheme for use in a real-world setting. The resulting entanglement can also be interpreted as hybrid entanglement between different types of degrees of freedom of two physical systems, which could prove useful in large-scale, heterogeneous quantum networks. This work opens possibilities for testing nonlocality and for implementing new quantum communication protocols with time-bin entanglement.
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