Superconducting Quantum Interferometers for Nondestructive Evaluation

Superconducting Quantum Interferometers for Nondestructive Evaluation

We review stationary and mobile systems that are used for the nondestructive evaluation of room temperature objects and are based on superconducting quantum interference devices (SQUIDs). The systems are optimized for samples whose dimensions are between 10 micrometers and several meters. Stray magnetic fields from small samples (10 µm-10 cm) are studied using a SQUID microscope equipped with a...

Nondestructive readout for a superconducting flux qubit.

We present a new readout method for a superconducting flux qubit, based on the measurement of the Josephson inductance of a superconducting quantum interference device that is inductively coupled to the qubit. The intrinsic flux detection efficiency and backaction are suitable for a fast and nondestructive determination of the quantum state of the qubit, as needed for readout of multiple qubits...

Image Processing for Nondestructive Evaluation

Digital image processing techniques can improve the interpretation and evaluation of radiographic and acoustic image data as well as the time domain waveforms produced by ultrasonic, eddy current, and acoustic emission in two important ways. First, the image or waveform being evaluated can be enhanced to bring out detail not readily apparent to the observer. Second, the properly enhanced image ...

Quantum cryptography with polarizing interferometers

In the Ekert cryptographic scheme (E91) [1] pairs of EPR particles were used to generate identical sequences of bits in remote places, while Bell’s theorem certified that the particles were not measured in transit by an eavesdropper. The modification of the Ekert scheme proposed by Bennett, Brassard and Mermin (BBM92) [2] did not use the Bell theorem and was based essentially on the fact that t...

Topics On Nondestructive Evaluation Topics on Nondestructive Evaluation Series