Controlling Atomic-Scale Quantum Magnetic Structures
Abstract
Title: Controlling Atomic-Scale Quantum Magnetic StructuresObjective:The goals fall into three categories:1. Quantum magnetism of single-atom spins: Extend ESR and atom manipulation capabilities to new atom/surface combinations in order to improve the ESR perf"ormance and broaden its applicability. Determine binding sites and magnetic properties of these atoms. Measure, model, and improve t""he magnetic relaxation times, and quantum manipulation rates.2. Magnetic sensing and imaging: Employ spin-resonant atoms as sensiti"ve magnetometers to probe the magnetic properties of atoms and nanostructures. Buildcustom nanostructures having engineered magnetic properties. Perform imaging of their magnetic structures with atomic spatial resolution and single-spin sensitivity.3. Single-atom quantum bits (qubits): Explore the feasibility of using electricallymanipulated single-atom spins on surfaces as quantum bits. Apply these qubits forsensing and quantum information applications. Implement pulsed radio-frequency manipulation of quantum states in order to demonstrate general qubit operations. Implement protocols for extending coherence times and interrogating quantum states."Demonstrate two-qubit quantum gates and explore entangled quantum states.Approach:In this project, IBM will perform basic explora""tory research in the electronic and magnetic properties of atoms, molecules and nanostructures. These atoms and structures will be a"ssembled and positioned on surfaces with atomic-scale precision. This work will employ low-temperature scanning tunneling microscope"s (STMs), together with the newly demonstrated technique ofsingle-atom electron spin resonance (ESR) using STM. In this technique t""he spin resonance is driven and sensed electrically using the STM, a new capability that is presently available only at IBM. This re"search is exploratory in nature and directed toward gaining fundamental understanding of underlying scientific questions.SOW:Project Schedule and MilestonesYear I Milestones:Demonstrate increased spin lifetimes for individual magnetic atoms on a surface.Demonstrate improved spin resonance by using different atom/surface combinations.Year I Technical Tasks:Deposit atoms of candidate elements on atomically clean thin insulating surfaces and characterize their binding sites and magnetic properties.Extend atom manipulation capabilities to apply to new atom/surface combinations.Evaluate new candidate atom species for spin-resonance performance.Develop and extend models of quantum magnetism of atoms on surfaces to apply to new atoms.Year II Milestones:Construct atomically precise arrangements of sensor atoms for probing molecule~s magnetism.Image the magnetic structure within individual magnetic molecules by remotely sensing their magnetic fields.Year II Technical Tasks:Setup instrumentation for high-frequency pulsed experiments to control qubit states.Implement pulsed spin resonance techniques and measure Rabi-oscillation signal.Implement spectrum deconvolution method for analyzing spectra of multi-spin targets.Year III Milestones:Demonstrate one-qubit gates by using pulsed spin resonance of single atoms.Evaluate single-qubit gate fidelity by performing quantum state tomography.Image the magnetic structure of a molecule or nanostructure having more than one spin center.Year III Technical Tasks:Implement spin echo techniques and evaluate improvement in T2Setup for double-resonance experiments by implementing two-frequency driving.Future Naval Relevance:Single at"om based spin manipulation and control is vital to many future naval war-fighting capabilities, from cryptography, high performance" computation and quantum system simulation. Single-atom precision quantum technology is one of the key thrusts of ONR nanoelectronics program.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 01, 2017
- Source ID
- N000141712785
Entities
People
- Christopher P Lutz
Organizations
- International Business Machines Corporation (Armonk, NY)
- Office of Naval Research
- United States Navy