PT Journal
AU Aldana, M
   Lledo, MA
TI The Fuzzy Bit
SO Symmetry-Basel
JI Symmetry-Basel
PY 2023
BP 2103
EP 25pp
VL 15
IS 12
DI 10.3390/sym15122103
LA English
DE fuzzy sets; quantum logic; multivalued logic; Quantum Mechanics
AB In this paper, the formulation of Quantum Mechanics in terms of fuzzy logic and fuzzy sets is explored. A result by Pykacz, which establishes a correspondence between (quantum) logics (lattices with certain properties) and certain families of fuzzy sets, is applied to the Birkhoff-von Neumann logic, the lattice of projectors of a Hilbert space. Three cases are considered: the qubit, two qubits entangled, and a qutrit 'nested' inside the two entangled qubits. The membership functions of the fuzzy sets are explicitly computed and all the connectives of the fuzzy sets are interpreted as operations with these particular membership functions. In this way, a complete picture of the standard quantum logic in terms of fuzzy sets is obtained for the systems considered.
ER