1. Group of Nonlinear Physics, Universidad de Santiago de Compostela, Campus Sur, 15782 Santiago de Compostela, Spain
2. Department of Earth and Planetary Sciences, Origins of Life Initiative, Harvard University, Cambridge, Massachusetts 02138, United States
3. Santa Fe Institute, Santa Fe, New Mexico 87501, United States
4. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada