Objective This project will investigate the construction of a single-issue (non-ensemble), spin-based solid-state (SBSS), quantum information processing device using endohedral fullerenes. The Group V C60 endohedrals have been shown to be well suited to SBSS quantum computing with long spin lifetimes, large hyperfine couplings, and separate endohedrals spin-coupled via a magnetic dipole coupling. One of the primary obstacles to the construction of a single-issue SBSS device is the lack of a single electron spin readout. The goals of this project are (I) to investigate a variety of candidate single-spin readout techniques and develop an efficient readout technology primarily for use with endohedral fullerenes; and (II) to concurrently develop single-issue quantum computer implementations based on endohedral fullerenes which ultimately uses the developed readout technique to perform few-qubit single-issue quantum information processing. This project will investigate the construction of a single-issue (non-ensemble), spin-based solid-state (SBSS), quantum information processing device using endohedral fullerenes. The Group V C60 endohedrals have been shown to be well suited to SBSS quantum computing with long spin lifetimes, large hyperfine couplings, and separate endohedrals spin-coupled via a magnetic dipole coupling. One of the primary obstacles to the construction of a single-issue SBSS device is the lack of a single electron spin readout. The goals of this project are (I) to investigate a variety of candidate single-spin readout techniques and develop an efficient readout technology primarily for use with endohedral fullerenes; and (II) to concurrently develop single-issue quantum computer implementations based on endohedral fullerenes which ultimately uses the developed readout technique to perform few-qubit single-issue quantum information processing.OBJECTIVESThe primary objective is to develop a single-issue (non-ensemble), quantum computing device using Group V endohedral fullerenes. The primary thrust of the project's work will be to develop an efficient single electron spin readout technology for use with endohedral fullerenes. The project will investigate the use of Nano SQUIDS, Single Molecule Spectroscopy, Magnetic Resonance Force Microscope, STM-ESR and Single Fullerene Transistors as a means of reading out the spin state of the endohedral electrons. In parallel, we will investigate globally and locally addressed quantum computing architectures through the development of an integrated ESR microresonator together with on-chip generation of ultra-high magnetic field gradients to allow frequency addressing of individual endohedrals. The ultimate goal of the project will be to demonstrate few-qubit quantum information processing using the developed readout techniques.DESCRIPTION OF WORKThe project work is primarily in two parts. The first part will investigate a number of techniques focusing on the ultimate readout of the spin of the electronic state of a single paramagnetic Group V endohedral molecule. These are molecules that consist of a Group V atom trapped within a fullerene carbon cage. The project will investigate performing electronic spin detection directly on the endohedrals using MRFM and Nano SQUID techniques. In addition, we will investigate readout systems which are specifically tailored for optimal single-electron spin detection in STM-ESR and Single Molecule Spectroscopy (SMS), as well as MRFM and Nano SQUID. These will be, organic free radicals, molecular magnets and nano-crystalline N-V colour centers in Diamond. The project will also investigate the coupling of these separate readout systems to the endohedrals, both chemically and physically, to establish an indirect method of reading out the spin state of the single endohedral. We will also investigate an electro-mechanical spin readout via a single molecule fullerene transistor. The second area of the project will investigate the implementation of various single-issue SBSS quantum computing architectures involving Group V endohedrals. We will build on previous designs for a globally addressed (cellular automata), and locally addressed architectures. The project will construct a integrated on-chip ESR microresonator spectrometer which will be specifically suited for small spin samples. In addition we will investigate the possibility of frequency addressing the endohedral spins by the application of ultra-high on-chip magnetic field gradients. The final goal for the project will be to demonstrate few-spin single-issue quantum information processing using the developed readout technology and to further investigate the scalability of both the locally and globally addressed quantum computing architectures Fields of science engineering and technologymaterials engineeringcolorsnatural sciencesphysical sciencesopticsmicroscopyengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwarequantum computersnatural sciencesphysical sciencesopticsspectroscopy Programme(s) FP5-IST - Programme for research, technological development and demonstration on a "User-friendly information society, 1998-2002" Topic(s) IST-2002-6.2.1 - Quantum Information Processing and Communication (QIPC) Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator NATIONAL UNIVERSITY OF IRELAND, MAYNOOTH EU contribution No data Address MAYNOOTH, CO. KILDARE Ireland See on map Total cost No data Participants (7) Sort alphabetically Sort by EU Contribution Expand all Collapse all HAHN-MEITNER-INSTITUT BERLIN GMBH Germany EU contribution No data Address GLIENICKER STRASSE 100 14109 BERLIN See on map Total cost No data MAX-PLANCK GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V. Germany EU contribution No data Address HOFGARTENSTRASSE 8 80539 MUENCHEN See on map Total cost No data THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE United Kingdom EU contribution No data Address The Old Schools, Trinity Lane CB21TT CAMBRIDGE See on map Total cost No data THE UNIVERSITY OF QUEENSLAND Australia EU contribution No data Address QLD4072 BRISBANE, QUEENSLAND See on map Total cost No data UNIVERSITAET DORTMUND Germany EU contribution No data Address AUGUST-SCHMIDT-STRASSE 4 44227 DORTMUND See on map Total cost No data UNIVERSITAET STUTTGART Germany EU contribution No data Address KEPLERSTRASSE 7 70174 STUTTGART See on map Total cost No data UNIVERSITY COLLEGE CORK, NATIONAL UNIVERSITY OF IRELAND, CORK Ireland EU contribution No data Address Western Road CORK See on map Total cost No data