In situ characterization of qubit control lines: a qubit as a vector network analyzer

We present a technique to measure the transfer function of a control line using a qubit as a vector network analyzer. Our method requires coupling the line under test to the the longitudinal component of the Hamiltonian of the qubit and the ability to induce Rabi oscillations through simultaneous driving of the transversal component. We used this technique to characterize the 'flux' control of a superconducting Transmon qubit in the range of 8 to 400\,MHz. Our method can be used for the qubit 'flux' line calibration to increase the fidelity of entangling gates for the quantum processor. The qubit can be also used as a microscopic probe of the electro-magnetic fields on a chip.Comment: 5 pages, 4 figure

MRI and image quantitation for assessment of the growth effects of anabolic steroid precursors in a guinea pig model

MRI and image quantitation play an expanding role in modern drug research. With effective image segmentation and analysis methods, in vivo and longitudinal tissue growth can be assessed. The effects of the nandrolone and testosterone steroids on muscle growth have been investigated previously, in which MRI acquisition and analysis protocol were established, and excellent correlations were found between MRI measurement and dissection analyzes. In this study, the MRI protocol was used to evaluate the anabolic potential of 4 steroid precursors. The effects on muscle growth in castrated guinea pigs, in comparison with that of respective positive control steroids were determined.MRI and image quantitation play an expanding role in modern drug research. With effective image segmentation and analysis methods, in vivo and longitudinal tissue growth can be assessed. The effects of the nandrolone and testosterone steroids on muscle growth have been investigated previously, in which MRI acquisition and analysis protocol were established, and excellent correlations were found between MRI measurement and dissection analyzes. In this study, the MRI protocol was used to evaluate the anabolic potential of 4 steroid precursors. The effects on muscle growth in castrated guinea pigs, in comparison with that of respective positive control steroids were determined.published_or_final_versio