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Kompilator języka QCL - QCL2QML1

100%

Gawron P. , Miszczak J. , Winiarczyk R. , Wycisk P.

2007

tom Vol. 28, nr 4

5-18

W artykule przedstawiony jest kompilator proceduralnego języka Quantum Computation Language do języka sekwencyjnego Quantum Markup Lan-guage. Wadą języka QML jest jego słaba skalowalność. Wykorzystanie wysokopozio-mowego języka QCL rozwiązuje ten problem poprzez wprowadzenie elementów proceduralnego paradygmatu programowania. Umożliwia to wielokrotne wykorzystanie kodu do podobnych problemów o różnych rozmiarach.

Article presents compiler which takes code written in procedural Quantum Computation Language as the input and produces sequential Quantum Markup Language code. The disadvantage of QML language is its Iow scalability. Usage of high-level language such as QCL solves this problem by introducing elements of procedural programming paradigm. It allows code reusability to solve similar problems of different size.

Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser

100%

Yang W.-X. , Chen A.-X. , Zha T.-T. , Bai Y. , Lee R.-K.

Open Physics

2014

tom 12

nr 10

737-743

We demonstrate the generation of two-mode continuous-variable (CV) entanglement in a V-type three-level atom trapped in a doubly resonant cavity using a microwave field driving a hyperfine transition between two upper excited states. By numerically simulating the dynamics of this system, our results show that the CV entanglement with large mean number of photons can be generated even in presence of the atomic relaxation and cavity losses. More interestingly, it is found that the intensity and period of entanglement can be enhanced significantly with the increasing of the atomic relaxation due to the existence of the perfect spontaneously generated interference between two atomic decay channels. Moreover, we also show that the entanglement can be controlled efficiently by tuning the intensity of spontaneously generated interference and the detuning of the cavity field.

A brief overview of quantum computing theory

88%

Siedlecka O.

Computing, Multimedia and Intelligent Techniques

2006

tom Vol. 2, nr 1

35-44

In this paper we make a short overview of current state of the art in the field of quantum computing. The basic issues of classical physics, probabilistic system, quantum mechanics and quantum information are included. As an example the Grover's Search Algorithm is presented.

Quantum Cryptography - The Issue of Security in Selected Quantum Protocols and the Issue of Data Credibility

88%

Krzyszkowska-Pytel M.

2010

tom Vol. 22, No. 1

73-92

Quantum cryptography, a field of science that had not been known before, developed rapidly in the late 20th century. It originated from a combination of quantum mechanics and information technology. The present paper presents the possibilities of using quantum mechanics in cryptography and considers whether there are any practical solutions to the important class of problems regarding the security of transmitted information.

Pod koniec XX - go wieku nastąpił gwałtowny rozwój nieznanej dotąd dziedziny - kryptografii kwantowej. Dziedzina ta wywodzi się ze splotu mechaniki kwantowej i informatyki. W niniejszym opracowaniu przedstawimy możliwości wykorzystania mechaniki kwantowej w kryptografii oraz zastanowimy się czy wynikają z nich praktyczne rozwiązywania dla istotnej klasy problemów związanych z bezpieczeństwem przesyłanej informacji.

Two models of quantum random walk

88%

Košík J.

Open Physics

2003

tom 1

nr 4

556-573

We present an overview of two models of quantum random walk. In the first model, the discrete quantum random walk, we present the explicit solution for the recurring amplitude of the quantum random walk on a one-dimensional lattice. We also introduce a new method of solving the problem of random walk in the most general case and use it to derive the hitting amplitude for quantum random walk on the hypercube. The second is a special model based on a local interaction between neighboring spin-1/2 particles on a one-dimensional lattice. We present explicit results for the relevant quantities and obtain an upper bound on the speed of convergence to limiting probability distribution.