Objective Quantum storage and processing of information allow new computational tasks impossible with any conventional information technology. Such quantum computing (QC) requires a system of many quantum bits: qubits. This is an ASSESSMENT PROJECT to investigate a new QC candidate system, based on magnetic qubits. We propose to investigate both magnetic molecular clusters and dielectric nanometre-size single domain magnetic particles.The main objectives are:1) Understanding magnetic qubit decoherence, through comparison of resonance experiments with theory;2) Measurement of a single magnetic qubit, using a micro-SQUID. Expected project results are data on and understanding of qubit quality factors, data on single qubit detection and supporting theory/modelling. Quantum storage and processing of information allow new computational tasks impossible with any conventional information technology. Such quantum computing (QC) requires a system of many quantum bits: qubits. This is an ASSESSMENT PROJECT to investigate a new QC candidate system, based on magnetic qubits. We propose to investigate both magnetic molecular clusters and dielectric nanometre-size single domain magnetic particles.The main objectives are:1) Understanding magnetic qubit decoherence, through comparison of resonance experiments with theory;2) Measurement of a single magnetic qubit, using a micro-SQUID. Expected project results are data on and understanding of qubit quality factors, data on single qubit detection and supporting theory/modelling.OBJECTIVESWe aim to investigate a new QC candidate system, based on magnetic qubits. If successful, we expect this investigation to lead to a longer term research effort to explore fully the possibility of magnetic QC and to initiate the development of magnetic QC technology. Specifically, this magnetic qubit consists of a nanometer-size magnetic particle (ferri- and antiferromagnetic particles and cluster sytems) and, in general dielectric, with a high quality factor Q for the ferromagnetic resonance. Such a high-Q system can sustain a quantum suprepositioin of the ground and first excited spin states and thus behave as qubit. While in the medium term we will operate in the mK regime, it is one of our goals to eventually operate also in the Kelvin regime.DESCRIPTION OF WORK1. Detection of the decoherence time in both molecular clusters and nanometer-size magnetic particles, and understanding the dissipation phenomena causing the de-coherence in these systems (e.g. the dependence on sample purity and nuclear spins). Our main aim here is to perform low temperature resonant experiments, 50 mK < T < 1.8 K, at frequencies between 1 MHz and 100 GHz. That is, we will focus our attention in phenomena having de-coherence time between 10 -6 and 10 -12 seconds. For the application as QC candidates, both the comparison of the de-coherence time with the time to perform gate-operations and the magnitude of the figure of merit Q are crucial;2. Development of nano-techniques and technologies for the fabrication, handling, positioning and integration of a single magnetic qubit into a superconducting circuit containing a micro-SQUID. Most of the technological steps required for the integration of such devices (deposition of thin films of superconductors and oxides, electron beam and optical lithography, reactive ion beam etching, AFM manipulation and local oxidation, processing and characterization of magnetic dots) are already available in the proposers' laboratory. Fields of science natural scienceschemical scienceselectrochemistryelectrolysisengineering and technologymaterials engineeringcoating and filmsengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwarequantum computersnatural sciencesphysical scienceselectromagnetism and electronicssuperconductivity Keywords Nanotechnology Programme(s) FP5-IST - Programme for research, technological development and demonstration on a "User-friendly information society, 1998-2002" Topic(s) 1.1.2.-6.1.1 - FET O: Open domain Call for proposal Data not available Funding Scheme ACM - Preparatory, accompanying and support measures Coordinator UNIVERSITAD DE BARCELONA EU contribution No data Address GRAN VIA CORTS CATALANES 585 08007 BARCELONA Spain See on map Total cost No data Participants (2) Sort alphabetically Sort by EU Contribution Expand all Collapse all CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS Spain EU contribution No data Address C(Serrano, 117 MADRID See on map Links Website Opens in new window Total cost No data HEWLETT-PACKARD LIMITED United Kingdom EU contribution No data Address CAIN ROAD BRACKNELL See on map Total cost No data
