  Superqubits are the minimal supersymmetric extension of qubits. In this paper
we investigate in detail their unusual properties with emphasis on their
potential role in (super)quantum information theory and foundations of quantum
mechanics. We propose a partial solution to the problem of negative transition
probabilities that appear in the theory and has been previously reported
elsewhere. The modification does not affect the performance of supersymmetric
entangled states in the CHSH game - superqubits provide resources more nonlocal
than it is allowed by ordinary quantum mechanics.
