Even and Odd Cat States of Two and Three Qubits in the Probability Representation of Quantum Mechanics
Matyas I. Mechler, Margarita Aleksandrovna Man'ko, Vladimir I. Man’ko, Петер Адам · Entropy · 2024
We derive the probability representation of even and odd cat states of two and three qubits. These states are even and odd superpositions of spin-1/2 eigenstates corresponding to two opposite directions along the z axis. The probability representation of even and odd cat states of an oscillating spin-1/2 particle is also discussed. The exact formulas for entangled probability distributions describing density matrices of all these states are obtained.