Experimental device-independent verification of quantum steering
arXiv:1408.0563 · doi:10.1038/ncomms6886
Abstract
Bell nonlocality between distant quantum systems---i.e., joint correlations which violate a Bell inequality---can be verified without trusting the measurement devices used, nor those performing the measurements. This leads to unconditionally secure protocols for quantum information tasks such as cryptographic key distribution. However, complete verification of Bell nonlocality requires high detection efficiencies, and is not robust to the typical transmission losses that occur in long distance applications. In contrast, quantum steering, a weaker form of quantum correlation, can be verified for arbitrarily low detection efficiencies and high losses. The cost is that current steering-verification protocols require complete trust in one of the measurement devices and its operator, allowing only one-sided secure key distribution. We present device-independent steering protocols that remove this need for trust, even when Bell nonlocality is not present. We experimentally demonstrate this principle for singlet states and states that do not violate a Bell inequality.
arXiv comment7 pages, 3 figures
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Cited by in corpus (41)
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- Multipartite Gaussian steering: monogamy constraints and quantum cryptography applications
- A resource theory of quantum memories and their faithful verification with minimal assumptions
- Efficient and pure femtosecond-pulse-length source of polarization-entangled photons
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- Temporal steering and security of quantum key distribution with mutually-unbiased bases against individual attacks
- Gaussian quantum steering and its asymmetry in curved spacetime
- Experimental demonstration of measurement-device-independent measure of quantum steering
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- Mapping Criteria of Nonlocality-Steerability in Qudit-Qubit Systems and Steerability-Entanglement in Qubit-Qudit Systems
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- Energy efficient mining on a quantum-enabled blockchain using light
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- Certified Random Number Generation from Quantum Steering
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- Measurement-device-independent verification of channel steering
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- Creation of bipartite steering correlations by a fast damped auxiliary mode
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- Measurement-device-independent Schmidt number certification of all entangled states
- Quantum Assemblage Tomography