3 June 2011 Implementing an optical CNOT using spatial parity qubits
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Abstract
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.
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K. Kagalwala, K. Kagalwala, G. Di Giuseppe, G. Di Giuseppe, A. F. Abouraddy, A. F. Abouraddy, B. E. A. Saleh, B. E. A. Saleh, "Implementing an optical CNOT using spatial parity qubits", Proc. SPIE 8057, Quantum Information and Computation IX, 80570L (3 June 2011); doi: 10.1117/12.883995; https://doi.org/10.1117/12.883995
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