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q-fin.ST2022★ 14 cited
COVID-19 impact on the international trade
Célestin Coquidé, José Lages, Leonardo Ermann +1
Using the United Nations Comtrade database, we perform the Google matrix analysis of the multiproduct World Trade Network (WTN) for the years 2018-2020 comprising the emergence of…
quant-ph2022
Loschmidt echo and Poincaré recurrences of entanglement
Leonardo Ermann, Klaus M. Frahm, Dima L Shepelyansky
We study numerically the properties of entanglement of two interacting, or noninteracting, particles evolving in a regime of quantum chaos in the quantum Chirikov standard map. Suc…