On-chip interaction-free measurements via the quantum Zeno effect

Abstract

Although interference is a classical-wave phenomenon, the superposition principle, which underlies interference of individual particles, is at the heart of quantum physics. An interaction-free measurements (IFM) harnesses the wave-particle duality of single photons to sense the presence of an object via the modification of the interference pattern, which can be accomplished even if the photon and the object haven't interacted with each other. By using the quantum Zeno effect, the efficiency of an IFM can be made arbitrarily close to unity. Here we report an on-chip realization of the IFM based on silicon photonics. We exploit the inherent advantages of the lithographically written waveguides: excellent interferometric phase stability and mode matching, and obtain multipath interference with visibility above 98%. We achieved a normalized IFM efficiency up to 68.2%, which exceeds the 50% limit of the original IFM proposal.

arXiv comment4.5 pages + supplemental material

References in corpus (19)

• Quantum Cryptography
• Photonic quantum technologies
• Quantum Mechanical Interaction-Free Measurements
• On-chip quantum interference between silicon photon-pair sources
• High Speed and High Efficiency Travelling Wave Single-Photon Detectors Embedded in Nanophotonic Circuits
• High-efficiency quantum interrogation measurements via the quantum Zeno effect
• Quantum Computing Using Single Photons and the Zeno Effect
• Quantum Logic Operations Using Single Photons and the Zeno Effect
• Continuous and Pulsed Quantum Zeno Effect
• Multi-photon quantum interference in a multi-port integrated photonic device
• "Interaction-Free" Imaging
• Waveguide integrated low noise NbTiN nanowire single-photon detectors with milli-Hz dark count rate
• Zeno effect for quantum computation and control
• NbTiN superconducting nanowire detectors for visible and telecom wavelengths single photon counting on Si3N4 photonic circuits
• Counterfactual Computation
• Optical time domain reflectometry with low noise waveguide-coupled superconducting nanowire single-photon detectors
• Experimental demonstration of interaction-free all-optical switching via the quantum Zeno effect
• Experiment on Interaction-Free Measurement in Neutron Interferometry
• Near-infrared Hong-Ou-Mandel interference on a silicon quantum photonic circuit

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• Interaction-free measurement study as a quantum channel discrimination problem
• Paradoxical consequences of multipath coherence: perfect interaction-free measurements
• Theory of coherent interaction-free detection of pulses
• Coherent interaction-free detection of noise
• Interaction-free measurement of multiple objects using a universal integrated photonic processor