Steering nonlocality in high-speed telecommunication system without detection loophole
arxiv(2024)
摘要
Nonlocal correlation represents the key feature of quantum mechanics, which
is exploited as a resource in quantum information processing. However, the
loophole issues hamper the practical applications. We report the first
demonstration of steering nonlocality with detection loophole closed at
telecommunication wavelengths. In this endeavour, we design and fabricate a
low-loss silicon chip for efficient entanglement generation, and further apply
the direct modulation technique to its optical pump to eliminate phase-encoding
loss at the steering side. The newly proposed phase-encoding measurement
setting adapts to an ultra-fast modulation rate (GHz). Consequently, we build a
fiber-optic setup that can overcome the detection efficiency that is required
by quantum steering with multiple measurement settings. Our setup provides an
immediate platform for exploring applications based on steering nonlocality,
especially for quantum communication.
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