The ability to switch the coupling between quantum bits (qubits) on and off is essential for implementing many quantum-computing algorithms. We demonstrated such control with two flux qubits coupled together through their mutual inductances and through the dc superconducting quantum interference device (SQUID) that reads out their magnetic flux states. A bias current applied to the SQUID in the...

Multichannel SQUID magnetometers are being developed for signal-field mapping in biomagnetic experiments. A problem that becomes more serious as the number of channels is increased is the crosstalk caused by the mutual inductances between the individual sensing coils. A simple and effective method for eliminating this crosstalk is presented in this Paper. The method is based on a rearrangement ...

In this work, an application to simulate electric and magnetic phenomena during design of printed circuit boards (PCB) is presented. The commercial schematic simulation software currently uses advanced models of components, but not of connections. However, with Simul-EMI II it is possible to get results very close to physical reality of the electronic circuits, in the same environment of schema...

This paper introduces a method for the modeling and analysis of a Permanent Magnet Synchronous Machine (PMSM). The model is based on two dimensional Finite Element (FE) magnetic field analysis. The numerical data of FE solutions are used for obtaining the variations of the self and the mutual inductances and the flux linkages depending on the angular position rotor. In order to have a more gene...

Based on a network graph analysis of the underlying circuit, a quantum theory of arbitrary superconducting charge qubits is derived. Describing the dissipative elements of the circuit with a Caldeira-Leggett model, we calculate the decoherence and leakage rates of a charge qubit. The analysis includes decoherence due to a dissipative circuit element such as a voltage source or the quasiparticle...

Abstract. A model for a solar flare, involving magnetic reconnection transferring flux and current between current-carrying magnetic loops connecting two pairs of footpoints, is generalized to include conservation of magnetic helicity during reconnection, as well as conservation of current at all four footpoints. For a set of force-free loops, with the ith loop having flux Fi and current Ii, th...

This paper presents in detail numerical methods and techniques for lightning impulse (LI) modeling simulation of power distribution transformers. The are based on equivalent circuits transformer winding entities resulting from the initial discretization determined by required accuracy. parameters circuit such as resistances self- mutual capacitances inductances obtained field simulations (FEM)....

One of the most promising inductive power transfer applications is the wireless power supply for locomotives which may cancel the need for pantographs. In order to meet the dynamic and high power demands of wireless power supplies for locomotives, a relatively long transmitter track and multiple receivers are usually adopted. However, during the dynamic charging, the mutual inductances between ...

This paper combines the use of multi-phase configurations and current harmonic injection methods to achieve significantly improved performance for doubly salient synchronous reluctance machines (DS-SRMs). In order understand torque production mechanism DS-SRMs with injection, some general analytical models have been developed. The are based on Fourier Series analysis self- mutual-inductances. I...