4 problems

Coffman–Kundu–Wootters conjecture. For an $N$-qubit system, the entanglement between one qubit and the remaining $N-1$ qubits should be at least the sum of its pairwise entanglemen…

Gaussian contangle monogamy conjecture. The monogamy inequality should hold for all multimode Gaussian states:

Monogamy conjecture. High values of $|{\cal J}_A|$ must be linked to low values of $S_A$:

Let $\lvert\psi\rangle$ be a normalised complex vector in the tensor product Hilbert space … For a subsystem, $\operatorname{Tr}_B$ and $\operatorname{Tr}_C$ denote the correspondi…