**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**8

# Search results for: quantum computing

##### 8 Reversible Binary Arithmetic for Integrated Circuit Design

**Authors:**
D. Krishnaveni,
M. Geetha Priya

**Abstract:**

Application of reversible logic in integrated circuits results in the improved optimization of power consumption. This technology can be put into use in a variety of low power applications such as quantum computing, optical computing, nano-technology, and Complementary Metal Oxide Semiconductor (CMOS) Very Large Scale Integrated (VLSI) design etc. Logic gates are the basic building blocks in the design of any logic network and thus integrated circuits. In this paper, reversible Dual Key Gate (DKG) and Dual key Gate Pair (DKGP) gates that work singly as full adder/full subtractor are used to realize the basic building blocks of logic circuits. Reversible full adder/subtractor and parallel adder/ subtractor are designed using other reversible gates available in the literature and compared with that of DKG & DKGP gates. Efficient performance of reversible logic circuits relies on the optimization of the key parameters viz number of constant inputs, garbage outputs and number of reversible gates. The full adder/subtractor and parallel adder/subtractor design with reversible DKGP and DKG gates results in least number of constant inputs, garbage outputs, and number of reversible gates compared to the other designs. Thus, this paper provides a threshold to build more complex arithmetic systems using these reversible logic gates, leading to the enhanced performance of computing systems.

**Keywords:**
Quantum Computing,
full adder,
reversible logic gates,
Low power CMOS,
full subtractor,
parallel adder/subtractor,
basic gates,
universal gates

##### 7 Reversible Signed Division for Computing Systems

**Authors:**
D. Krishnaveni,
M. Geetha Priya

**Abstract:**

Applications of reversible logic gates in the design of complex integrated circuits provide power optimization. This technique finds a great use in low power CMOS design, optical computing, quantum computing and nanotechnology. This paper proposes a reversible signed division circuit that can divide an n-bit signed dividend with an n-bit signed divisor using non-restoration division logic. The proposed design adequately addresses the ‘delay’ there by improving the efficiency of the circuit. An attempt is made to design a reversible signed division circuit. This paper provides a threshold to build more complex arithmetic systems using reversible logic, thus increasing the performance of computing systems.

**Keywords:**
Quantum Computing,
reversible logic gates,
Low power CMOS,
shift register,
signed division

##### 6 Quantum Computing: A New Era of Computing

**Authors:**
Jyoti Chaturvedi Gursaran

**Abstract:**

Nature conducts its action in a very private manner. To reveal these actions classical science has done a great effort. But classical science can experiment only with the things that can be seen with eyes. Beyond the scope of classical science quantum science works very well. It is based on some postulates like qubit, superposition of two states, entanglement, measurement and evolution of states that are briefly described in the present paper. One of the applications of quantum computing i.e. implementation of a novel quantum evolutionary algorithm(QEA) to automate the time tabling problem of Dayalbagh Educational Institute (Deemed University) is also presented in this paper. Making a good timetable is a scheduling problem. It is NP-hard, multi-constrained, complex and a combinatorial optimization problem. The solution of this problem cannot be obtained in polynomial time. The QEA uses genetic operators on the Q-bit as well as updating operator of quantum gate which is introduced as a variation operator to converge toward better solutions.

**Keywords:**
Quantum Computing,
entanglement,
Superposition,
evolutionary algorithm,
qubit,
measurement of states,
evolution of states,
Scheduling
problem,
hard and soft constraints,
quantum
evolutionary algorithm

##### 5 Single-qubit Quantum Gates using Magneto-optic Kerr Effect

**Authors:**
Pradeep Kumar K

**Abstract:**

We propose the use of magneto-optic Kerr effect (MOKE) to realize single-qubit quantum gates. We consider longitudinal and polar MOKE in reflection geometry in which the magnetic field is parallel to both the plane of incidence and surface of the film. MOKE couples incident TE and TM polarized photons and the Hamiltonian that represents this interaction is isomorphic to that of a canonical two-level quantum system. By varying the phase and amplitude of the magnetic field, we can realize Hadamard, NOT, and arbitrary phase-shift single-qubit quantum gates. The principal advantage is operation with magnetically non-transparent materials.

**Keywords:**
Quantum Computing,
qubit,
magneto-optic kerr effect (MOKE),
magneto-optical interactions,
continuous variables

##### 4 Entanglement-based Quantum Computing by Diagrams of States

**Authors:**
Sara Felloni,
Giuliano Strini

**Abstract:**

**Keywords:**
Quantum Information,
entanglement,
Quantum Circuits,
Diagrams of states

##### 3 A Programmerâ€™s Survey of the Quantum Computing Paradigm

**Authors:**
Philippe Jorrand

**Abstract:**

Research in quantum computation is looking for the consequences of having information encoding, processing and communication exploit the laws of quantum physics, i.e. the laws which govern the ultimate knowledge that we have, today, of the foreign world of elementary particles, as described by quantum mechanics. This paper starts with a short survey of the principles which underlie quantum computing, and of some of the major breakthroughs brought by the first ten to fifteen years of research in this domain; quantum algorithms and quantum teleportation are very biefly presented. The next sections are devoted to one among the many directions of current research in the quantum computation paradigm, namely quantum programming languages and their semantics. A few other hot topics and open problems in quantum information processing and communication are mentionned in few words in the concluding remarks, the most difficult of them being the physical implementation of a quantum computer. The interested reader will find a list of useful references at the end of the paper.

**Keywords:**
Quantum information processing,
Quantum algorithms,
Quantum programming languages

##### 2 A Quantum-Inspired Evolutionary Algorithm forMultiobjective Image Segmentation

**Authors:**
Hichem Talbi,
Mohamed Batouche,
Amer Draa

**Abstract:**

**Keywords:**
Quantum Computing,
Evolutionary Algorithms,
Multiobjective optimization,
Image Segmentation

##### 1 Power System Security Constrained Economic Dispatch Using Real Coded Quantum Inspired Evolution Algorithm

**Authors:**
A. K. Al-Othman,
F. S. Al-Fares,
K. M. EL-Nagger

**Abstract:**

**Keywords:**
State Estimation,
fuzzy linear regression,
FuzzyLinear State Estimator (FLSE) and Measurements Uncertainty