Sergey Bravyi, David Gosset, et al.
QIP 2020
Motivated by quantum network applications over classical channels, we initiate the study of n-party resource states from which LOCC protocols can create EPRpairs between any k disjoint pairs of parties. We give constructions of such states where k is not too far from the optimal n/2 while the individual parties need to hold only a constant number of qubits. In the special case when each party holds only one qubit, we describe a family of n-qubit states with k proportional to log n based on Reed-Muller codes, as well as small numerically found examples for k = 2 and k = 3. We also prove some lower bounds, for example showing that if k = n/2 then the parties must have at least Ω(log log n) qubits each.
Sergey Bravyi, David Gosset, et al.
QIP 2020
Sergiy Zhuk, Niall F. Robertson, et al.
PRResearch
Sergey Bravyi, Robert Raussendorf
Physical Review A - AMO
Sergey Bravyi, Dmitri Maslov
IEEE Trans. Inf. Theory