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Coerência e emaranhamento em dinâmica não-Markoviana de qubits

Cristian E. Susa, John Henry Reina

Universitas ScientiarumAug 1, 20130 citations

Quantum coherence and entanglement preservation in Markovian and non-Markovian dynamics via additional qubits

Naghi Behzadi, Bahram Ahansaz, Esfandyar Faizi

arXiv:1607.06507The European Physical Journal DNov 1, 201726 citations

Coherencia y entrelazamiento en dinámica no Markoviana de qubits

Cristian E. Susa, John Henry Reina

We provide a thorough analysis of the entanglement dynamics of an interacting two-qubit system in the non-Markovian regime. In such a regime, the time scale on which the reservoir degrees of freedom evolve is either of the same order of magnitude or less than that on which the system evolves. We used an exact numerical method; the Quasi-Adiabatic Path Integral (QUAPI) technique, to describe the corresponding qubit dissipative dynamics in such a non-Markovian regime. We computed the time evolution of the density operator for the quibits, from which we quantified the coherences and population dynamics, as well as the qubit-bath coupling effects. Using negativity as a metric, we calculated the dynamics of non-local quantum correlations (entanglement), and indentified a non-Markovian quantum phenomena in terms of early stage disentanglement, and the collapse and revival of entanglement.We provide a thorough analysis of the entanglement dynamics of an interacting two-qubit system in the non-Markovian regime. In such a regime, the time scale on which the reservoir degrees of freedom evolve is either of the same order of magnitude or less than that on which the system evolves. We used an exact numerical method; the Quasi-Adiabatic Path Integral (QUAPI) technique, to describe the corresponding qubit dissipative dynamics in such a non-Markovian regime. We computed the time evolution of the density operator for the quibits, from which we quantified the coherences and population dynamics, as well as the qubit-bath coupling effects. Using negativity as a metric, we calculated the dynamics of non-local quantum correlations (entanglement), and indentified a non-Markovian quantum phenomena in terms of early stage disentanglement, and the collapse and revival of entanglement.

Universitas ScientiarumJun 17, 20130 citations

Coherence, correlation and non-Markovianity in qubit systems

Ning Tang, Wen Cheng, Hao‐Sheng Zeng

The European Physical Journal DSep 30, 20147 citations

IS THE DYNAMICS OF DISSIPATIVE LORENTZIAN CHANNELS NON MARKOVIAN?

Karen Fonseca, R. R. Rey-González

ResumenConsideramos la dinámica disipativa de un excitón en un reservorio Lorentziano, relevante en la descripción de algunos complejos fotosintéticos.Aunque esta dinámica se ha descrito con frecuencia como no Markoviana, mostramos que esta puede ser una caracterización equivocada.Describimos un enfoque en el cual es posible decidir si la dinámica es o no Markoviana y lo aplicamos al reservorio Lorentziano.

Jan 1, 20130 citations

Dinámica no Markoviana de un Espin Central en una Red de Espines Interactuantes

Rafael Gutiérrez, J. Rodríguez Garzón

In this work we study the dynamics of a central spin coupled to a bath of N spin- 1 2 , arranged in a spin star configuration. The coupling between the central spin with each spin of the bath is Heisenberg X-Y type. Considering the bath as a collective environment spin, we find the exact dynamics for the thermodynamic limit of the bath particles, N �¨ ��. The results show colapses and revivals for populations. This is considered a signal of non-Markovian dynamics.

Revista de la Sociedad Colombiana de FísicaJan 1, 20090 citations

Coherencia y entrelazamiento en dinámica no Markoviana de qubits

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Coherencia y entrelazamiento en dinámica no Markoviana de qubits

Abstract

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