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arXiv · 1812.06506

Coupling-assisted Landau-Majorana-Stuckelberg-Zener transition in two-interacting-qubit systems

R. Grimaudo·N. V. Vitanov·A. Messina
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Abstract

We analyse a system of two interacting spin-qubits subjected to a Landau-Majorana-Stückelberg-Zener (LMSZ) ramp. We prove that LMSZ transitions of the two spin-qubits are possible without an external transverse static field since its role is played by the coupling between the spin-qubits. We show how such a physical effect could be exploited to estimate the strength of the interaction between the two spin-qubits and to generate entangled states of the system by appropriately setting the slope of the ramp. Moreover, the study of effects of the coupling parameters on the time-behaviour of the entanglement is reported. Finally, our symmetry-based approach allows us to discuss also effects stemming from the presence of a classical noise or non-Hermitian dephasing terms.

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R. Grimaudo, N. V. Vitanov, A. Messina. 2019-05-20. Coupling-assisted Landau-Majorana-Stuckelberg-Zener transition in two-interacting-qubit systems. https://doi.org/10.1103/physrevb.99.174416

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