dorsal/arxiv
View SchemaQuantum process tomography: the role of initial correlations
| Authors | Mario Ziman |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603166 |
| URL | https://arxiv.org/abs/quant-ph/0603166 |
Abstract
We address the problem of quantum process tomography with the preparators producing states correlated with the environmental degrees of freedom that play role in the system-environment interactions. We discuss the physical situations, in which the dynamics is described by nonlinear, or noncompletely positive transformations. In particular, we show that arbitrary mapping $\varrho_{\rm in}\to\varrho_{\rm out}$ can be realized by using appropriate set of preparators and applying the unitary operation SWAP. The experimental ``realization'' of perfect NOT operation is presented. We address the problem of the verification of the compatibility of the preparator devices with the estimating process. The evolution map describing the dynamics in arbitrary time interval is known not to be completely positive, but still linear. The tomography and general properties of these maps are discussed.
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"abstract": "We address the problem of quantum process tomography with the preparators\nproducing states correlated with the environmental degrees of freedom that play\nrole in the system-environment interactions. We discuss the physical\nsituations, in which the dynamics is described by nonlinear, or noncompletely\npositive transformations. In particular, we show that arbitrary mapping\n$\\varrho_{\\rm in}\\to\\varrho_{\\rm out}$ can be realized by using appropriate set\nof preparators and applying the unitary operation SWAP. The experimental\n``realization\u0027\u0027 of perfect NOT operation is presented. We address the problem\nof the verification of the compatibility of the preparator devices with the\nestimating process. The evolution map describing the dynamics in arbitrary time\ninterval is known not to be completely positive, but still linear. The\ntomography and general properties of these maps are discussed.",
"arxiv_id": "quant-ph/0603166",
"authors": [
"Mario Ziman"
],
"categories": [
"quant-ph"
],
"title": "Quantum process tomography: the role of initial correlations",
"url": "https://arxiv.org/abs/quant-ph/0603166"
},
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