1,394 research outputs found
Quantum Information processing by NMR: Implementation of Inversion-on-equality gate, Parity gate and Fanout gate
While quantum information processing by nuclear magnetic resonance (NMR) with
small number of qubits is well established, implementation of lengthy
computations have proved to be difficult due to decoherence/relaxation. In such
circumstances, shallow circuits (circuits using parallel computation) may prove
to be realistic. Parity and fanout gates are essential to create shallow
circuits. In this article we implement inversion-on-equality gate, followed by
parity gate and fanout gate in 3-qubit systems by NMR, using evolution under
indirect exchange coupling Hamiltonian.Comment: 24 pages, 7 figure
Programmable quantum state discriminator by Nuclear Magnetic Resonance
In this paper a programmable quantum state discriminator is implemented by
using nuclear magnetic resonance. We use a two qubit spin-1/2 system, one for
the data qubit and one for the ancilla (programme) qubit. This device does the
unambiguous (error free) discrimination of pair of states of the data qubit
that are symmetrically located about a fixed state. The device is used to
discriminate both, linearly polarized states and elliptically polarized states.
The maximum probability of the successful discrimination is achieved by
suitably preparing the ancilla qubit. It is also shown that, the probability of
discrimination depends on angle of unitary operator of the protocol and
ellipticity of the data qubit state.Comment: 22 pages and 9 figure
Implementation of controlled phase shift gates and Collins version of Deutsch-Jozsa algorithm on a quadrupolar spin-7/2 nucleus using non-adiabatic geometric phases
In this work Controlled phase shift gates are implemented on a qaudrupolar
system, by using non-adiabatic geometric phases. A general procedure is given,
for implementing controlled phase shift gates in an 'N' level system. The
utility of such controlled phase shift gates, is demonstrated here by
implementing 3-qubit Deutsch-Jozsa algorithm on a 7/2 quadrupolar nucleus
oriented in a liquid crystal matrix.Comment: 23 pages, 7 figure
ARTIFICIAL INTELLIGENCE AND PARTICLE SWARM OPTIMIZATION ALGORITHM FOR OPTIMIZATION PROBLEM IN MICROGRIDS
The modern heuristic techniques mainly include the application of the artificial intelligence approaches such as genetic algorithm, particle swarmoptimization algorithm, ant colony optimization, stochastic diffusion search, differential evolution, etc. The main aspect of these techniques is theirflexibility for solving the optimization problems that have different mathematical constraints. In a power system area, the competition between theelectric utilities is gradually increased due to the deregulation of the electrical markets. For this reason, the generation expansion problem presentsitself as an important issue that needs to be considered in order to achieve reasonable economic decisions.Keywords: Genetic algorithm, Particle swarm optimization, Artificial intelligence
New Cascaded Architecture for Classical and Quantum Multiparameter Sensing
We present an innovative concept for quantum-enhanced multiparameter optical
phase sensing that can be implemented in free space, optical fiber or on-chip.
Our measurable phases are in series, or cascaded, enabling measurements as a
function of position with only a single input and output. We have modeled up to
20 phases, and fitting shows near-linear scaling of the power requirements for
additional phases. This novel approach represents a new paradigm in
multiparameter quantum metrology, and can be applied to remote sensing,
communications, and geophysics.Comment: 5 pages, 4 figures. Comments are welcom
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