5 papers
Z2 topological order and first-order quantum phase transitions in systems with combinatorial gauge symmetry
Kai-Hsin Wu, Zhi-Cheng Yang, Dmitry Green +2
We study a generalization of the two-dimensional transverse-field Ising model, combining both ferromagnetic and antiferromagnetic two-body interactions, that hosts exact global and…
quantum double in a superconducting wire array
Zhi-Cheng Yang, Dmitry Green, Hongji Yu +1
We show that a quantum double can be realized in an array of superconducting wires coupled via Josephson junctions. With a suitably chosen magnetic flux threading th…
Constructing Quantum Spin Liquids Using Combinatorial Gauge Symmetry
Claudio Chamon, Dmitry Green, Zhi-Cheng Yang
We introduce the notion of combinatorial gauge symmetry -- a local transformation that includes single spin rotations plus permutations of spins (or swaps of their quantum states)…
Single T gate in a Clifford circuit drives transition to universal entanglement spectrum statistics
Shiyu Zhou, Zhi-Cheng Yang, Alioscia Hamma +1
Clifford circuits are insufficient for universal quantum computation or creating -designs with . While the entanglement entropy is not a telltale of this insufficiency,…
Scrambling via Braiding of Nonabelions
Zhi-Cheng Yang, Konstantinos Meichanetzidis, Stefanos Kourtis +1
We study how quantum states are scrambled via braiding in systems of non-Abelian anyons through the lens of entanglement spectrum statistics. In particular, we focus on the degree…