6 papers
Magneto-electric cooling rate of a multiferroic antiferromagnetic quantum spin system: the cumulative influence of the site-dependent magnetic and electric fields
William Degaulle Waladi Gueagni, Lionel Tenemeza Kenfack, Martin Tchoffo +2
The magneto-electrocaloric effect which can be defined as the coupling between magnetocaloric and electrocaloric effects attracts currently considerable attention due to the advant…
On decoherence induced by a spin chain: role of initial prepared states
L. T. Kenfack, M. R. T. Fokou, M. Tchoffo +2
We study the decoherence process induced by a spin chain environment on a central spin consisting of R spins and we apply it on the dynamics of quantum correlations (QCs) of three…
Dynamics of entanglement and state-space trajectories followed by a system of four-qubit in the presence of random telegraph noise: common environment (CE) versus independent environments (IEs)
L. T. Kenfack, M. Tchoffo, M. N. Jipdi +2
The paper investigates the dynamics of entanglement and explores some geometrical characteristics of the trajectories in state space, in four-qubit Greenberger-Horne-Zeilinger (GHZ…
New orderings for effective mass Hamiltonians and associated wavefunction matching conditions at abrupt heterojunctions
Mercel Vubangsi, Martin Tchoffo, Lukong Cornelius Fai
We show that for a given setting of the Von Roos ambiguity parameters, it is not required that the Morrow and Brownstein condition be satisfied to achieve physically acceptable tra…
Dzyaloshinskii-Moriya interactions effects on the entanglement dynamics of a two qubit xxz spin system in non-Markovian environment
Georges Collince Fouokeng, Martin Tchoffo, Edwine Tendong +1
We investigate the exact entanglement dynamics of a two-qubit Heisenberg XXZ chain with Dzyaloshinskii-Moriya (DM) interactions, interacting with an anisotropic spin bath in therma…
Path Integral approach to kinematical browmian motion, due to random canonical transformation
M. Tchoffo, A. A. Belinson
The stochastization of the Jacobi second equality of classical mechanics, by Gaussian white noises for the Lagrangian of a particle in an arbitrary field is considered. The quantum…