Pauli tomography: complete characterization of a single qubit device
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Publication:4406125
DOI10.1002/PROP.200310047zbMATH Open1020.81012arXivquant-ph/0207143OpenAlexW1968081030MaRDI QIDQ4406125
Author name not available (Why is that?)
Publication date: 25 June 2003
Published in: (Search for Journal in Brave)
Abstract: The marriage of Quantum Physics and Information Technology, originally motivated by the need for miniaturization, has recently opened the way to the realization of radically new information-processing devices, with the possibility of guaranteed secure cryptographic communications, and tremendous speedups of some complex computational tasks. Among the many problems posed by the new information technology there is the need of characterizing the new quantum devices, making a complete identification and characterization of their functioning. As we will see, quantum mechanics provides us with a powerful tool to achieve the task easily and efficiently: this tools is the so called quantum entanglement, the basis of the quantum parallelism of the future computers. We present here the first full experimental quantum characterization of a single-qubit device. The new method, we may refer to as quantum radiography, uses a Pauli Quantum Tomography at the output of the device, and needs only a single entangled state at the input, which works on the test channel as all possible input states in quantum parallel. The method can be easily extended to any n-qubits device.
Full work available at URL: https://arxiv.org/abs/quant-ph/0207143
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