Abstract Probabilistic quantum logic operations can be implemented using linear optical elements, additional photons (ancilla), and post‐selection based on the results of measurements made on the ancilla photons. Here we describe the experimental demonstration of several quantum logic devices of that kind, including a quantum parity check and a destructive controlled‐NOT (CNOT) gate. An experimental demonstration of feed‐forward control for use in quantum logic operations is also reported. The implementation of a conventional CNOT gate using polarizing beam splitters is described, along with a new “high‐fidelity” approach in which the logic gates always produce an output.Abstract Probabilistic quantum logic operations can be implemented using linear optical elements, additional photons (ancilla), and post‐selection based on the results of measurements made on the ancilla photons. Here we describe the experimental demonstration of several quantum logic devices of that kind, including a quantum parity check and a destructive controlled‐NOT (CNOT) gate. An experimental demonstration of feed‐forward control for use in quantum logic operations is also reported. The implementation of a conventional CNOT gate using polarizing beam splitters is described, along with a new “high‐fidelity” approach in which the logic gates always produce an output.

Fortschritte der PhysikApr 24, 20033 citations

Proposal of controlled-NOT gate using linear polarization optics

Hanae Yoshidome, Nobuo Goto

Conference on Lasers and Electro-OpticsJan 1, 20050 citations

Linear optical controlled-NOT gate in the coincidence basis

Timothy C. Ralph, Nathan K. Langford, T. B. Bell +1 more

We describe the operation and tolerances of a nondeterministic, coincidence basis, quantum controlled-NOT gate for photonic qubits. It is constructed solely from linear optical elements and requires only a two-photon source for its demonstration. Its success probability is $1/9.$ We describe the operation and tolerances of a nondeterministic, coincidence basis, quantum controlled-NOT gate for photonic qubits. It is constructed solely from linear optical elements and requires only a two-photon source for its demonstration. Its success probability is $1/9.$

arXiv:quant-ph/0112088Physical Review AJun 20, 2002345 citations

Design and realization of a quantum Controlled NOT gate using optical implementation

Kartick Biswas, Shihan Sajeed

Jun 1, 20121 citation

1/9.