Postselection-loophole-free Bell violation with genuine time-bin entanglement
arXiv:1804.10150 · doi:10.1103/PhysRevLett.121.190401
Abstract
Entanglement is an invaluable resource for fundamental tests of physics and the implementation of quantum information protocols such as device-independent secure communications. In particular, time-bin entanglement is widely exploited to reach these purposes both in free-space and optical fiber propagation, due to the robustness and simplicity of its implementation. However, all existing realizations of time-bin entanglement suffer from an intrinsic postselection loophole, which undermines their usefulness. Here, we report the first experimental violation of Bell's inequality with "genuine" time-bin entanglement, free of the postselection loophole. We introduced a novel function of the interferometers at the two measurement stations, that operate as fast synchronized optical switches. This scheme allowed to obtain a postselection-loophole-free Bell violation of more than nine standard deviations. Since our scheme is fully implementable using standard fiber-based components and is compatible with modern integrated photonics, our results pave the way for the distribution of genuine time-bin entanglement over long distances.
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References in corpus (38)
- Quantum Cryptography
- The Quantum Internet
- Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
- Device-independent security of quantum cryptography against collective attacks
- Significant-loophole-free test of Bell's theorem with entangled photons
- A strong loophole-free test of local realism
- Violation of Bell inequalities by photons more than 10 km apart
- Generation of Hyperentangled Photons Pairs
- Secure quantum key distribution over 421 km of optical fiber
- From Bell's Theorem to Secure Quantum Key Distribution
- Pulsed energy-time entangled twin-photon source for quantum communication
- Quantum Cryptography using entangled photons in energy-time Bell states
- Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength
- Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
- Graphene Phase Modulator
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Distribution of time-bin qubits over 50 km of optical fiber
- Certified randomness in quantum physics
- Loopholes in Bell Inequality Tests of Local Realism
- Entanglement distribution over 300 km of fiber
- Distribution of high-dimensional entanglement via an intra-city free-space link
- Long-distance Bell-type tests using energy-time entangled photons
- Simple 2.5 GHz time-bin quantum key distribution
- Two-photon Franson-type experiments and local realism
- Bell's inequality and the coincidence-time loophole
- Interference at the Single Photon Level Along Satellite-Ground Channels
- Proposed Bell experiment with genuine energy-time entanglement
- Simple and high-speed polarization-based QKD
- Security of high-dimensional quantum key distribution protocols using Franson interferometers
- Hacking energy-time entanglement-based systems with classical light
- Long-distance distribution of genuine energy-time entanglement
- Extending Wheeler's delayed-choice experiment to Space
- Experimental Bell inequality violation without the postselection loophole
- Testing Hardy nonlocality proof with genuine energy-time entanglement
- Postselection-Loophole-Free Bell Test Over an Installed Optical Fiber Network
- Energy-time entanglement, Elements of Reality, and Local Realism
- Reconfigurable generation and measurement of mutually unbiased bases for time-bin qudits
- High-Visibility Time-Bin Entanglement for Testing Chained Bell Inequalities
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- Experimental demonstration of conjugate-Franson interferometry
- A robust approach for time-bin encoded photonic quantum information protocols
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- On safe post-selection for Bell tests with ideal detectors: Causal diagram approach
- A Sagnac-based arbitrary time-bin state encoder for quantum communication applications
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- Photonic quantum information with time-bins: Principles and applications
- Bell inequality violation on small NISQ computers