We propose a σz ⊗ laser-free entangling gate which uses the intrinsic J-coupling of ions in static magnetic gradient. Dephasing interaction is suppressed by means continuous dynamical decoupling using pairs microwave fields. The virtually insensitive to common amplitude noise fields and enables high fidelities despite qubit frequency fluctuations, while interaction's inherent robustness motiona...

1. INTRODUCTION In the quantum computational framework there are polynomial time solving algorithms, for problems having exponential classical solutions. The quest is – on one hand – to search if there are other possible effective quantum algorithms and – on the other hand – to be able to produce efficient implementations for the already known algorithms. The most feasible implementation of qua...

Jonathan A. Jones, Vlatko Vedral, Artur Ekert and Giuseppe Castagnoli Centre for Quantum Computation, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK OCMS, New Chemistry Laboratory, South Parks Road, Oxford OX1 3QT, UK Elsag,Via Puccini 2, 1615 Genova, Italy (February 29, 2008) An exciting recent development has been the discovery that the computational power of quantum computers exceeds t...

objective: different categories are available for estimating of radiation dose. radioisotopes with the same energy and almost the same physical properties have similar effects. monte carlo technique is a computerized method based on mathematical simulation of physical processes. the main purpose of this study is to show that beta particles are not able to penetrate deep into the water. also dif...

As CMOS technology scaling pushes towards the reduction of length transistors, electronic circuits face numerous reliability issues, and in particular nodes D-latches at nano-scale confront multiple-node upset errors due to their operation harsh radiative environments. In this manuscript, a new high reliable D-latch which can tolerate quadruple-node upsets is presented. The design based on low-...

Stabilized cat codes can provide a biased noise channel with set of bias-preserving (BP) gates, which significantly reduce the resource overhead for fault-tolerant quantum computing. All existing schemes BP however, require adiabatic evolution, performance limited by excitation loss and nonadiabatic errors during gates. In this paper, we apply derivative-based leakage-suppression technique to o...

There is a growing interest in providing communications to “Challenged” environments which have been hitherto isolated and disconnected due to the lack of communications infrastructure. These are regions which lie at the edge of the current Internet. Confidentiality, integrity and availability are the three major security requirements of any secured system or network. This paper presents our wo...

This paper proposes the use of processor support for program rollback, as a key primitive to enhance software debugging in production-run environments. We discuss how hardware support for program rollback can be used to characterize bugs on-the-fly, leverage code versioning for performance or reliability, sandbox device drivers, collect monitoring information with very low overhead, support fai...

In the near future of high component density and low-power technologies, soft errors occurring not only in memory systems and latches but also in the combinational parts of logic circuits will seriously affect the reliable operation of integrated circuits. This paper presents a novel design style which reduces the impact of radiation-induced single event transients (SET) on logic circuits, and ...

In this paper FPGA is used as the master chip to design the new fourphase sensorless BLDC(brushless direct current) motor control system of automobile engine cooling fan. The design uses BEMF zero-crossing detection algorithm and the hardware modular design approach, while the open-loop circuit adopted to raise the frequency and voltage and the digital phase-shift circuit based on FIPS algorith...