cirq.experiments.generate_boixo_2018_supremacy_circuits_v2_grid

Generates Google Random Circuits v2 as in github.com/sboixo/GRCS cz_v2.

See also https://arxiv.org/abs/1807.10749

n_rows number of rows of a 2D lattice.
n_cols number of columns.
cz_depth number of layers with CZ gates.
seed seed for the random instance.

A circuit corresponding to instance inst_{n_rows}x{ncols}{czdepth+1}{seed}

The mapping of qubits is cirq.GridQubit(j,k) -> qj*n_cols+k