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Biased nonlocal quantum games
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We address the question of when quantum entanglement is a useful resource for information processing tasks by presenting a new class of nonlocal games that are simple, direct, generalizations of the Clauser Horne Shimony Holt game. For some ranges of the parameters that specify the games, quantum mechanics offers an advantage, while, surprisingly, for others quantum mechanics is no more powerful than classical mechanics in performing the nonlocal task. This sheds new light on the difference between classical, quantum and super-quantum correlations.
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Device-independent quantum cryptography with input leakage
Quantifies certifiable local randomness and secret key rates in CHSH-based device-independent protocols under partial input leakage modeled by a noisy channel.
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