Control-free state engineering by hybrid measurement-unitary bang-bang
Mads Kock Pedersen, Jens Jakob Sørensen, Malte C. Tichy, Jacob Friis Sherson · arXiv (Cornell University) · 2014
State preparation in high-dimensional Hilbert-spaces does not require control over a system Hamiltonian or over applicable measurement operators: We show how to prepare a desired state or subspace, given a static projection operator onto the desired target that is applied repeatedly at optimised moments in time. Benchmarks against other schemes, performed on random Hamiltonians and on Bose-Hubbard systems, establish the competitiveness of the method.