On single qubit quantum process tomography for trace-preserving and nontrace-preserving maps

2015/02/03 by Ramesh Bhandari, Nicholas A. Peters, Bhandari, Ramesh +1 · 1 citation
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #quant-ph

paper · pdf · doi:10.48550/arxiv.1502.01016

4 pages, 1 figure

arxiv created 2015/02/03 · openalex publication_date 2015/02/03 · arxiv updated 2015/02/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We review single-qubit quantum process tomography for trace-preserving and nontrace-preserving processes, and derive explicit forms of the general constraints for fitting experimental data. These forms provide additional insight into the structure of the process matrix as well as reveal a tighter bound on the trace of a nontrace-preserving process than has been previously stated. We also describe, for completeness, how to incorporate measured imperfect input states.

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