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Logic Gate Operations (logic + gate_operations)

Distribution by Scientific Domains

Chemistry	50%

Selected Abstracts

Multiplexed Analysis of Hg2+ and Ag+ Ions by Nucleic Acid Functionalized CdSe/ZnS Quantum Dots and Their Use for Logic Gate Operations,

ANGEWANDTE CHEMIE, Issue 42 2009
Ronit Freeman
Eine logische Analyse: Mit Nucleinsäuren funktionalisierte CdSe/ZnS-Quantenpunkte werden für den optischen selektiven Parallelnachweis von Hg2+ - und Ag+ -Ionen und für die Aktivierung von Logikgattern mithilfe dieser Ionen als Eingabesignale verwendet. [source]

Initialization and logic gate operations of nuclear spin qubits using a submicron scale resistively-detected NMR device

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 1 2008
T. Ota
Abstract We demonstrate initialization of nuclear spin qubits using a resistively-detected nuclear magnetic resonance (NMR) device. In our device, nuclear spins are dynamically polarized in a sub-micron scale region defined by split gates. The population of each nuclear spin state is estimated from a resistively-detected NMR spectrum combined with numerical analysis. By applying radio frequency pulses to the polarized nuclear spins, we create two-qubit effective pure states, which is a crucial step toward NMR quantum computation. We also demonstrate simple logic gate operations such as controlled-NOT and SWAP gates in this two-qubit system. The obtained spectra are consistent with numerically calculated ones. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Ion-Triggered Multistate Molecular Switching Device Based on Regioselective Coordination-Controlled Ion Binding

CHEMISTRY - A EUROPEAN JOURNAL, Issue 23 2005
Anne Petitjean Dr.
Abstract Molecular devices capable of accessing different controlled conformational states, while optically signaling the occupied state, are attractive tools for nanotechnology since they relate to both areas of molecular mechanical devices and logic gates. We report here a simple molecular system that allows access to four distinct conformational and optical states. It is based on the regioselective complexation of metal ions to a heterocyclic ligand triad, which is dictated by the accessible coordination geometry and electrostatic properties of two distinct binding subunits. Thus, local conformational switching is brought about by tetrahedral coordination (of CuI) or octahedral coordination (of M2+ ions) to bidentate and tridentate binding subunits, respectively. The shape modifications undergone represent an ion-controlled nanomechanical device. They give controlled access to four different states that display different physico-chemical (e.g. optical) properties and provide a basis for logic gate operations. [source]