Experimental Investigation of Nonideal Two-qubit Quantum-state Filter by Quantum Process Tomography

Details Experimental Investigation of Nonideal Two-qubit Quantum-state Filter by Quantum Process Tomography Experimental Investigation of Nonideal Two-qubit Quantum-state Filter by Quantum Process Tomography

2004-05-13

arxiv.org/abs/quant-ph/0405073v4

Physics

Quantum Physics

4 pages, 4 figures, RevTeX, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.010404

We used quantum process tomography to investigate and identify the function of a nonideal two-qubit quantum-state filters subject to various degree of decoherence. We present a simple decoherence model that explains the experimental results and point out that a beamsplitter followed by a post-selection process is not, as commonly believed, a singlet-state filter. In the ideal case it is a triplet-state filter.

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