Direct Characterization of Quantum Dynamics: General Theory

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dc.creatorMohseni, M.
dc.creatorLidar, D. A.
dc.date2006-01-05
dc.date2007-03-28
dc.date.accessioned2026-07-07T08:13:40Z
dc.date.available2026-07-07T08:13:40Z
dc.descriptionThe characterization of the dynamics of quantum systems is a task of both fundamental and practical importance. A general class of methods which have been developed in quantum information theory to accomplish this task is known as quantum process tomography (QPT). In an earlier paper [M. Mohseni and D. A. Lidar, Phys. Rev. Lett. 97, 170501 (2006)] we presented a new algorithm for Direct Characterization of Quantum Dynamics (DCQD) of two-level quantum systems. Here we provide a generalization by developing a theory for direct and complete characterization of the dynamics of arbitrary quantum systems. In contrast to other QPT schemes, DCQD relies on quantum error-detection techniques and does not require any quantum state tomography. We demonstrate that for the full characterization of the dynamics of n d-level quantum systems (with d a power of a prime), the minimal number of required experimental configurations is reduced quadratically from d^{4n} in separable QPT schemes to d^{2n} in DCQD.
dc.description17 pages, 6 figures, minor modifications are made
dc.identifierhttps://arxiv.org/abs/quant-ph/0601034
dc.identifierhttp://arxiv.org/abs/quant-ph/0601034
dc.identifierPhys. Rev. A 75, 062331 (2007)
dc.identifierdoi:10.1103/PhysRevA.75.062331
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/132845
dc.subjectQuantum Physics
dc.titleDirect Characterization of Quantum Dynamics: General Theory
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