| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Information causality (IC) states that the information obtainable by a receiver
cannot be greater than the communication bits from a sender. We extended
the formula of IC to include the effects of randomness that is intrinsic in quantum mechanics. The obtained formula is tight and saturated at some quantum mechanical boundary in the space of no-signaling correlations, and the strength of the quantum correlations at the boundary is considered to be limited by a cryptographic principle rather than IC. Moreover, we developed a device-independent method to calculate a lower bound of the degree of the remote randomness.
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