Regular language quantum states
Marta Florido-Llinàs, Álvaro M. Alhambra, David Pérez-García, and J. Ignacio Cirac
Quantum 10, 2089 (2026). https://doi.org/10.22331/q-2026-04-29-2089 We introduce regular language states, a family of quantum many-body states. They are built from a special class of formal languages, called regular, which has been thoroughly studied in the field of computer science. They can be understood as the superposition of all the words in a regular language and encompass physically relevant states such as the GHZ-, W- or Dicke-states. By leveraging the theory of regular languages, we dev