BETHE'S DOUBLE GROUP AND CONSCIOUSNESS

Evgeny Konstantinovich Sklyanin

Bill Sutherland

Н. А. Соловьев

Chunguang Wang

Stephen Fenner, Yong Zhang

We study two group theoretic problems, GROUP INTERSECTION and DOUBLE COSET MEMBERSHIP, in the setting of black-box groups, where DOUBLE COSET MEMBERSHIP generalizes a set of problems, including GROUP MEMBERSHIP, GROUP FACTORIZATION, and COSET INTERSECTION. No polynomial-time classical algorithms are known for these problems. We show that for solvable groups, there exist efficient quantum algorithms for GROUP INTERSECTION if one of the underlying solvable groups has a smoothly solvable commutator subgroup, and for DOUBLE COSET MEMBERSHIP if one of the underlying solvable groups is smoothly solvable. We also study the decision versions of STABILIZER and ORBIT COSET, which generalizes GROUP INTERSECTION and DOUBLE COSET MEMBERSHIP, respectively. We show that they reduce to ORBIT COSET under certain conditions. Finally, we show that DOUBLE COSET MEMBERSHIP and DOUBLE COSET NONMEMBERSHIP have zero knowledge proof systems.

Stephen Fenner, Yong Zhang

We introduce two decision problems, STABILIZERD and TRANSLATING COSETD, and give quantum reductions from them to the problem ORBIT SUPERPOSITION, as well as quantum reductions to them from two group theoretic problems GROUP INTERSECTION and DOUBLE COSET MEMBERSHIP. Based on these reductions, efficient quantum algorithms are obtained for GROUP INTERSECTION and DOUBLE COSET MEMBERSHIP in the setting of black-box groups. Specifically, for solvable groups, this gives efficient quantum algorithms for GROUP INTERSECTION if one of the underlying solvable groups has a smoothly solvable commutator subgroup, and for DOUBLE COSET MEMBERSHIP if one of the underlying solvable groups is smoothly solvable. We also show that GROUP INTERSECTION and DOUBLE COSET MEMBERSHIP are in the complexity class SZK.