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Wiesner Quantum Money: Difference between revisions
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==Assumptions== | ==Assumptions== | ||
* The two-state | * The quantum money state which is a two-state system must be isolated from the rest of universe, roughly. | ||
* When Wiesner wrote his thesis, there was no device operating in which the phase coherence of a two-state system was preserved for longer than about a second. | * When Wiesner wrote his thesis, there was no device operating in which the phase coherence of a two-state system was preserved for longer than about a second. | ||
==Outline== | ==Outline== | ||
Let the money have twenty isolated systems <math>S_i\in\{a, b, \alpha, \beta\}, i=1,...,20</math>. | Let the money have twenty isolated systems <math>S_i\in\{a, b, \alpha, \beta\}, i=1,...,20</math>. | ||