Two non-orthogonal states quantum cryptography method and apparatus with intra- and inter-qubit interference for eavesdropper detection
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United States of America Patent
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Mar 31, 2015
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Sep 23, 2010
app pub date -
Jun 4, 2010
filing date -
Sep 2, 2004
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Abstract
An apparatus and method for implementing a secure quantum cryptography system using two non-orthogonal states. For each qubit, the emitter station prepares a quantum system in one of two non-orthogonal quantum states in the time-basis to code bit values. Intra- and inter-qubit interference is then used to reveal eavesdropping attempts. Witness states are used to help reveal attacks performed across the quantum system separation.
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