A new mechanism of open system evolution and its entropy using unitary transformations in noncomposite qudit systems

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A new mechanism of open system evolution and its entropy using unitary transformations in noncomposite qudit systems	319 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/e21080736

Title: A new mechanism of open system evolution and its entropy using unitary transformations in noncomposite qudit systems
Creator: Castaños, Octavio
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Manko, Margarita A.
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Manko, Vladimir I.
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López-Saldívar, Julio Alberto
Date: 2019
DOI: 10.3390/e21080736
Description: The evolution of an open system is usually associated with the interaction of the system with an environment. A new method to study the open-type system evolution of a qubit (two-level atom) state is established. This evolution is determined by a unitary transformation applied to the qutrit (three-level atom) state, which defines the qubit subsystems. This procedure can be used to obtain different qubit quantum channels employing unitary transformations into the qutrit system. In particular, we study the phase damping and spontaneous-emission quantum channels. In addition, we mention a proposal for quasiunitary transforms of qubits, in view of the unitary transform of the total qutrit system. The experimental realization is also addressed. The probability representation of the evolution and its information-entropic characteristics are considered.