Abstract: A method of inducing nuclear spin hyper-antipolarization in a solid material is disclosed and described. The solid material can be subjected to an ultralow temperature and a magnetic field. The solid material can include donor nuclei and a carrier material while the material also has both a nuclear spin and an electron spin which are coupled sufficiently to allow an Overhauser effect. The solid material can be subjected at the ultralow temperature to a light source for a time sufficient to induce a substantial nuclear spin antipolarization in the solid material and form a nuclear spin hyper-antipolarized material. The ultralow temperature and light source are controlled so as to be sufficient to drive a non-equilibrium nuclear Overhauser effect of hyperfine coupled electron and nuclear spins. The resulting nuclear spin hyper-antipolarized material can be used for a variety of applications such as medical imaging and quantum computing.

Abstract: Multiple SQUID magnetometers that include at least two SQUID loops, each of which is composed of at least two Josephson Junctions connected in parallel with superconducting wires, are provided. The SQUID loops are fabricated such that they share a common Josephson Junction. Devices and application that employ the multiple SQUID magnetometers are also provided.