Papers – Page 26 – TechConnect Briefs

Critical Current Oscillations versus Pureness of Superconductor-ferromagnet Nanoscopic Multilayers

Shafranjuk S.E., Ketterson J., Northwestern University, US

In our report we study how the oscillations and reentrant behaviour of critical parameters depends on the elastic scattering of electrons on atomic impurities in S/F multilayers. The expressions for the electric supercurrent and for [...]

Quantum-like Computation and “Thinking” Based on Classical Oscillations

Orlov Y.F., Cornell University, US

Classical systems containing decision-making elements can possess quantum-like properties, most importantly interference of probabilities of different decisions. We demonstrate this theoretically using a set of linear numbered oscillators combined with decision-making and other devices. This [...]

Switching Dynamics of Double Barrier Josephson Junction Based Qubit Gate

Shafraniuk S.E., Nevirkovets I.P., Ketterson J., Northwestern University, US

The double barrier SINIS junctions (here S, I, and N denote a superconductor, an insulator, and a normal metal, respectively) with a nanoscopic N spacer are potentially capable of performing quantum logic operations (so-called qubits) [...]

Conductance of a Disordered Double Quantum Wire in a Magnetic Field: Boundary roughness scattering

Arapan S.C., Korepov S.V., Liberman M.A., Johansson B., Uppsala University, SE

Boundary roughness scattering in disordered tunnel-coupled double quantum wires in the presence of a magnetic field is considered. The low-temperature conductance as a function of applied magnetic field is calculated for different structure and disorder [...]

RAM Design Using Quantum-Dot Cellular Automata

Walus K., Vetteth A., Jullien G.A., Dimitrov V.S., ATIPS Laboratory, CA

One of the most novel and powerful emerging nanotechnologies is quantum computing. This paper proposes a design for a parallel random-access memory (RAM) using Quantum-Dot Cellular Automata (QCA). QCA has the potential of becoming the [...]

Transition of the Ground State in a Coupled N-layer Quantum Dot

Xie W., Guangzhou University, CN

There has been growing interest in the physics of quantum dots (QDs) in recent years because of the rapid development of fabrication technology. Most theoretical and experimental studies have been so far focused on the [...]

Quantum Computation with Persistent-current Aharonov-Bohm Qubits and Qugates

Kulik I.O., Bilkent University, TR

We propose that Aharonov-Bohm effect can be used for quantum computation. The effect consists of existence of persistent currents in mesoscopic/nanoscopic loops of normal metal or semiconductor in a magnetic field perpendicular to loop. Three-site [...]

Clocked Quantum-dot Cellular Automata circuits

Kummamurui R., Orlov A., Lent C., Bernstein G., Snider G., University of Notre Dame, US

We present an experimental demonstration of novel Quantum-dot Cellular Automata (QCA) circuits utilizing clocked architecture -a QCA latch and a two-bit QCA shift register. Devices are fabricated using metal tunnel junction technology and operate at [...]

Logic Optimization and Technology Mapping for CAEN

Färm P., Dubrova E., Tenhunen H., IMIT, KTH, SE

This paper considers the architectures and design issues involved in creating a nano-electronic computing system. We focus on the problems of technology dependent optimization and technology mapping for Chemically Assembled Electronic Nanotechnology (CAEN). We present [...]

Background Charge Insensitive Single-Electron Memory Devices

Yadavalli K., Orlov A., Snider G., Likharev K., Korotkov A., University of Notre Dame, US

In a Single-Electron Memory Cell (SEMC) one bit of information is represented by the excess or shortfall of a small (¡_1) number of electrons on the floating gate (FG). We present experimental results on the [...]