Multidimensional Entanglement Generation with Multicore Optical Fibers

Physical Review Applied, Journal Year: 2021, Volume and Issue: 15(3)

Published: March 9, 2021

Quantum communication will undoubtedly be deployed in telecommunication networks of the future. The current development classical is motivated by rapidly approaching limit existing optical fibers, known as ``capacity crunch''. A promising solution $s\phantom{\rule{0}{0ex}}p\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}c\phantom{\rule{0}{0ex}}e\ensuremath{-}d\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}v\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}s\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}n$ $m\phantom{\rule{0}{0ex}}u\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}p\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}x\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}g$, which using spatial modes supported modern fibers increases their information capacity. authors exploit related technologies to provide a source entangled photons compatible with this latest trend communication, may serve standard for next generation entanglement-based quantum systems.

Language: Английский

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Self-Testing of any Pure Entangled State with the Minimal Number of Measurements and Optimal Randomness Certification in a One-Sided Device-Independent Scenario

Physical Review Applied, Journal Year: 2023, Volume and Issue: 19(3)

Published: March 13, 2023

Certification of quantum systems and their properties has become a field intensive study. Here, taking advantage the one-sided device-independent (1SDI) scenario (also known as steering scenario), we propose self-testing scheme for all bipartite entangled states using single family inequalities with minimal number two measurements per party. Building on this then show how to certify rank-one extremal measurements, including nonprojective ${d}^{2}$-outcome which in turn can be used certification maximal amount randomness, that is, $2{\mathrm{log}}_{2}d$ bits. Finally, particular case $d=3$, an extended Bell transforms 1SDI ``almost device independent.''

Language: Английский

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Experimental creation of multi-photon high-dimensional layered quantum states

npj Quantum Information, Journal Year: 2020, Volume and Issue: 6(1)

Published: Oct. 21, 2020

Abstract Quantum entanglement is one of the most important resources in quantum information. In recent years, research mainly focused on increase number entangled qubits or high-dimensional two particles. Compared with qubit states, multipartite states have beneficial properties and are powerful for constructing networks. However, there few studies due to difficulty creating such states. this paper, we experimentally prepared a state $$\left|{\Psi }_{442}\right\rangle =\frac{1}{2}(\left|000\right\rangle +\left|110\right\rangle +\left|221\right\rangle +\left|331\right\rangle )$$ Ψ 442 = 1 2 ( 000 + 110 221 331 ) by using path mode photons. We obtain fidelity F = 0.854 ± 0.007 state, which proves real state. Finally, use demonstrate layered network principle. Our work highlights another route toward complex

Language: Английский

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Limits on sequential sharing of nonlocal advantage of quantum coherence

Science China Physics Mechanics and Astronomy, Journal Year: 2022, Volume and Issue: 65(6)

Published: April 26, 2022

Language: Английский

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Distribution of genuine high-dimensional entanglement over 10.2 km of noisy metropolitan atmosphere

Physical review. A/Physical review, A, Journal Year: 2023, Volume and Issue: 107(5)

Published: May 30, 2023

The authors investigate the dimensionality of photonic quantum entanglement distributed through a 10.2-km atmospheric link connecting building in center Vienna to distant laboratory Bisamberg. An atypical approach time-bin encoding was employed analyze data. results show that data cannot be explained by qubits alone, indicating presence high-dimensional system.

Language: Английский

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