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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Bilayer graphene lattice-layer entanglement in the presence of non-Markovian phase noise

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Author(s):
Bittencourt, Victor A. S. V. [1] ; Blasone, Massimo [2, 3] ; Bernardini, Alex E. [4]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Fis, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Salerno, Dipartimento Fis, Via Giovanni Paolo II 132, I-84084 Fisciano - Italy
[3] Ist Nazl Fis Nucl, Sez Napoli, Grp Collegato Salerno, Naples - Italy
[4] Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre 687, P-4169007 Porto - Portugal
Total Affiliations: 4
Document type: Journal article
Source: Physical Review B; v. 97, n. 12 MAR 30 2018.
Web of Science Citations: 1
Abstract

The evolution of single particle excitations of bilayer graphene under effects of non-Markovian noise is described with focus on the decoherence process of lattice-layer (LL) maximally entangled states. Once the noiseless dynamics of an arbitrary initial state is identified by the correspondence between the tight-binding Hamiltonian for the AB-stacked bilayer graphene and the Dirac equation-which includes pseudovectorlike and tensorlike field interactions-the noisy environment is described as random fluctuations on bias voltage and mass terms. The inclusion of noisy dynamics reproduces the Ornstein-Uhlenbeck processes: A non-Markovian noise model with a well-defined Markovian limit. Considering that an initial amount of entanglement shall be dissipated by the noise, two profiles of dissipation are identified. On one hand, for eigenstates of the noiseless Hamiltonian, deaths and revivals of entanglement are identified along the oscillation pattern for long interaction periods. On the other hand, for departing LL Werner and Cat states, the entanglement is suppressed although, for both cases, some identified memory effects compete with the pure noise-induced decoherence in order to preserve the the overall profile of a given initial state. (AU)

FAPESP's process: 17/02294-2 - The classical-quantum correspondence of cosmological scenarios from the analysis of Quantum Decoherence and Gaussian correlations
Grantee:Alex Eduardo de Bernardini
Support type: Scholarships abroad - Research