High-Tc SQUID gradiometer for mobile magnetic anomaly detection
Ted R. Clem, David J. Overway, et al.
IEEE TAS
The vacuum tunneling probe used in the scanning tunneling microscope represents a new class of nonreciprocal electromechanical transducers. Nonreciprocity implies reduced back action and consequently increased sensitivity over conventional, reciprocal transducers. A vacuum tunneling probe may reach the quantum limit for a measurement of the position of a macroscopic mechanical oscillator even with use of a non-quantum-limited amplifier. The quantum limit is enforced by the momentum shot noise associated with the tunneling current. © 1988 The American Physical Society.
Ted R. Clem, David J. Overway, et al.
IEEE TAS
Robert B. Laibowitz, Roger H. Koch
Proceedings of SPIE 1989
Roger H. Koch
Physical Review B
Matthias Steffen, Roger H. Koch
Physical Review A - AMO