  The fundamental features of the detection of non-stationary undulatory
perturbations of metrics based on the interference effects are considered. The
advantage of the Aharonov-Bohm effect in superconductors for these purposes in
comparison with the ordinary optical interference is demonstrated. Some
circuitries of the interferometric detectors in order to be used with SQUID are
suggested. The possibilities of lowering the noise temperature of the ultraweak
signals detectors based on the analogy between the processes of high-sensitive
measurements and the reversible calculations are discussed.

General Relativity and Quantum Cosmology