**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**7

# Search results for: qubit

##### 7 Proposal of Optimality Evaluation for Quantum Secure Communication Protocols by Taking the Average of the Main Protocol Parameters: Efficiency, Security and Practicality

**Authors:**
Georgi Bebrov,
Rozalina Dimova

**Abstract:**

**Keywords:**
Quantum cryptography,
quantum secure
communcation,
quantum secure direct communcation security,
quantum secure direct communcation efficiency,
quantum secure
direct communcation practicality.

##### 6 Implementation of Quantum Rotation Gates Using Controlled Non-Adiabatic Evolutions

**Authors:**
Abdelrahman A. H. Abdelrahim,
Gharib Subhi Mahmoud,
Sherzod Turaev,
Azeddine Messikh

**Abstract:**

**Keywords:**
Adiabatic evolutions,
non adiabatic evolutions,
controlled adiabatic evolutions,
quantum rotation gates,
dephasing
rates,
master equation.

##### 5 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,
qubit,
superposition,
entanglement,
measurement of states,
evolution of states,
Scheduling
problem,
hard and soft constraints,
evolutionary algorithm,
quantum
evolutionary algorithm.

##### 4 Application of Genetic Algorithms for Evolution of Quantum Equivalents of Boolean Circuits

**Authors:**
Swanti Satsangi,
Ashish Gulati,
Prem Kumar Kalra,
C. Patvardhan

**Abstract:**

**Keywords:**
Ancillas,
Boolean functions,
Genetic algorithm,
Oracles,
Quantum circuits,
Scratch bit

##### 3 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.

##### 2 Quantum Computation using Two Component Bose-Einstein Condensates

**Authors:**
Tim Byrnes

**Abstract:**

Quantum computation using qubits made of two component Bose-Einstein condensates (BECs) is analyzed. We construct a general framework for quantum algorithms to be executed using the collective states of the BECs. The use of BECs allows for an increase of energy scales via bosonic enhancement, resulting in two qubit gate operations that can be performed at a time reduced by a factor of N, where N is the number of bosons per qubit. We illustrate the scheme by an application to Deutsch-s and Grover-s algorithms, and discuss possible experimental implementations. Decoherence effects are analyzed under both general conditions and for the experimental implementation proposed.

**Keywords:**
Quantum,
computing,
information,
Bose-Einstein condensates,
macroscopic.

##### 1 Network of Coupled Stochastic Oscillators and One-way Quantum Computations

**Authors:**
Eugene Grichuk,
Margarita Kuzmina,
Eduard Manykin

**Abstract:**

**Keywords:**
network of stochastic oscillators,
one-way quantumcomputations,
a beam of polarized light.