The two-qubit amplitude damping channel: Characterization using quantum stabilizer codes

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• 作者：S. Omkar^a ; R. Srikanth^b ; ^{srik@poornaprajna.org" class="auth_mail" title="E-mail the corresponding author} ; Subhashish Banerjee^c ; Anil Shaji^a
• 关键词：Quantum process tomography ; Quantum error correcting codes
• 刊名：Annals of Physics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：373
• 期：Complete
• 页码：145-162
• 全文大小：551 K

文摘

A protocol based on quantum error correction based characterization of quantum dynamics (QECCD) is developed for quantum process tomography on a two-qubit system interacting dissipatively with a vacuum bath. The method uses a 5-qubit quantum error correcting code that corrects arbitrary errors on the first two qubits, and also saturates the quantum Hamming bound. The dissipative interaction with a vacuum bath allows for both correlated and independent noise on the two-qubit system. We study the dependence of the degree of the correlation of the noise on evolution time and inter-qubit separation.