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Summary

In this chapter we discuss the application of entanglement to quantum optical interferometry and to quantum information processing. Quantum random number generation is discussed. Quantum cryptography is discussed, as is quantum computing. The quantum optical realization of some quantum gates is discussed.

Summary

One of the first applications of quantum information to cryptography to be discovered is to the creation of money that cannot be copied. Due to the no-cloning principle, which states that there is no procedure that can copy an arbitrary quantum state, we can hope to create perfectly secure money based on quantum information. In this chapter we study how this can be done by following Wiesner’s idea from the 1970s. To analyze the security of Wiesner’s scheme we develop a formalism for general quantum attacks by studying quantum channels, and encounter some limitations of Wiesner’s scheme.

Summary

Appendix C: treatment of composite systems with the help of the tensor product of Hilbert spaces and partial trace operation. No-cloning theorem.

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11 - Applications of Entanglement: Heisenberg-Limited Interferometry and Quantum Information Processing

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3 - Quantum Money

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C - Description of Composite Systems

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3 results

11 - Applications of Entanglement: Heisenberg-Limited Interferometry and Quantum Information Processing

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3 - Quantum Money

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C - Description of Composite Systems

Summary