C. Allen Bishop, Travis S. Humble, Ryan S. Bennink, Brian P. Williams
We present a method for intrusion detection which is based on the Mach-Zehnder interference effect. This device provides monitored surveillance by continuously measuring the intensity of light collected by a pair of photodetectors. We find that our protocol allows for the detection of intrusion attempts which employ path- redirection and/or intercept-resend techniques. Expectation values for the registered output flux are provided for normal and interrupted operation.
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http://arxiv.org/abs/1303.6701
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