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Pre-hospital triage supported by electrocardiogram assessment and telemedicine was used to shorten time to reperfusion in subjects with acute myocardial infarction (AMI). Timely treatment of AMI presupposes huge geographical areas covered by one primary angioplasty network, one emergency medical service (EMS), and that pre-hospital electrocardiograms are interpreted by a physician, preferably a cardiologist.

We describe an optical implementation of a CNOT gate in which the control qubit is the polarization of a single photon and the target qubit is the spatial parity of the same photon. The gate is implemented with a polarizationsensitive spatial light modulator. We characterize the operation of the gate using quantum process tomography and the spatial parity is analyzed with a modified Mach-Zehnder interferometer. We also demonstrate the CNOT-gate operation with arbitrary rotation of the target qubit and discuss the possibility of implementing multi-qubit CNOT gates using the same approach.