Quantum steering in networks can be demonstrated with arbitrary low detector efficiency using entangled measurements, enabling loophole-free certification with room-temperature detectors and practically achievable source visibilities.

#QuantumSteering #DeviceIndependent #Research

New proof extends Kochen-Specker theorem to rule out arbitrary finite-valued nondeterministic models for quantum theory, advancing contextuality frameworks for device-independent protocols.

#QuantumContextuality #KochenSpecker #DeviceIndependent

Novel framework for certifying tripartite quantum networks using nonlinear Bell inequalities. Demonstrates self-testing of quantum states and measurements through maximal violation of ROCN inequalities in bilocal network scenarios.

#QuantumNetworks #BellInequalities #DeviceIndependent

Circumvents Naimark dilation to directly certify non-unitary quantum measurements in Bell tests, deriving analytic O(√ε) robustness bounds that reveal the severe practical cost of realistic POVMs versus idealized projective models.

#DeviceIndependent #QuantumCertification #BellInequalities

Multipartite information causality forces monogamy of Bell inequality violations, boosting security for device‑independent QKD (DI‑QKD) as reported in PR A 112, 042201 (2025). https://getnews.me/monogamy-relations-strengthen-security-of-device-independent-qkd/ #qkd #deviceindependent

Researchers verified genuinely entangled subspaces on both photonic and superconducting platforms, enabling device‑independent checks of the five‑qubit error‑correction code. https://getnews.me/device-independent-verification-of-genuine-entanglement/ #deviceindependent #entanglement

Device-independent certification extends beyond quantum states and channels to supermaps—operations acting on quantum operations. Research demonstrates self-tests for quantum algorithms like Grover's and the causally indefinite quantum switch.

#DeviceIndependent #QuantumInfo #Research

New Bell inequalities enable device-independent certification of optimal global randomness (2 log d bits) for quantum systems of arbitrary dimension using maximally entangled states and projective measurements.

#QuantumEntanglement #BellTest #DeviceIndependent

Framework enabling certification of nonlocality without entanglement in practical quantum measurements, even with imperfect detection. Works with untrusted devices using maximum-confidence measurement strategies.

#QuantumMeasurement #DeviceIndependent #Research

New self-testing protocol certifies quantum states and measurements with arbitrary measurement inputs using sum-of-squares optimization, including rigorous robustness analysis for practical noisy quantum systems.

#QuantumCertification #DeviceIndependent #Research

Novel truncation-based proof technique enables efficient seedless randomness extraction in device-independent quantum cryptography, achieving optimal one-bit-per-singlet key rate while using computationally efficient linear function extractors.

#QuantumCryptography #DeviceIndependent #Research

Breakthrough: Device-independent certification of multipartite quantum states now scales polynomially, overcoming exponential sample complexity barrier. Enables practical verification for scalable quantum networks.

#DeviceIndependent #QuantumCertification #Research

Analytical study identifies Svetlichny operator-based self-testing as most robust protocol for device-independent certification of GHZ states, enabling practical verification in noisy quantum systems.

#QuantumEntanglement #DeviceIndependent #QuantumCertification

First discrete-variable one-sided device-independent QKD demonstrated with 1 kbps key rate at 20 km. Semi-transmitter-device-independent protocol eliminates source vulnerabilities while maintaining strong loss tolerance for practical deployment.

#QuantumCryptography #DeviceIndependent #Research

Resolves 30-year debate on single-photon nonlocality, enabling device-independent QKD and random number generation secure against no-signaling adversaries via Bell inequality violations.

#QuantumCryptography #DeviceIndependent #News