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US 8,554,814 B2Granted
Random signal generator using quantum noise
AssigneeThe Governing Council of the University of Toronto
InventorsBing Qi, Hoi-Kwong Lo, Li Qian
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Abstract
Systems and methods for generating a random signal, based on quantum noise in the phase of two or more input signals. The generated output random signal has random variation in its intensity based on the quantum noise in the phases of the input signals.
Claims29
A system for generation of a random signal, the system comprising:
- at least one source supplying at least two input signals to corresponding signal paths, each of the at least two input signals exhibiting phase variations induced by quantum noise present in the at least one source;
- a mixer for receiving and interfering the at least two input signals to generate at least one output signal;
- wherein the output signal exhibits random intensity variation that is a function of the quantum noise induced phase variations exhibited by the at least two input signals.
A method of generating a random signal, the method comprising:
- supplying at least two input signals, each of the at least two of the input signals exhibiting phase variations induced by quantum noise present in at least one source of the at least two input signals;
- and
- interfering the at least two input signals to generate an output signal;
- wherein the output signal exhibits random intensity variation that is a function of the quantum noise induced phase variations exhibited by the at least two input signals.
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Dependencies are inferred from the claim text.