Coherent spin manipulation of individual atoms on a surface
Abstract
Spin-based quantum information processing requires coherent spin manipulation. Yang et al. demonstrate coherent control of surface titanium and iron atom spins on a magnesium oxide surface with a magnetic scanning tunneling microscope tip. Arbitrary sequences of fast electrical pulses delivered to the top induced large electric fields. These fields drove metal-atom movement, which then modulated the tip-atom exchange interaction to create an oscillating effective magnetic field. Advanced spin-control protocols such as Ramsey fringes and Hahn spin echoes revealed quantum dynamics, such as coherent oscillations in a titanium atom dimer assembled on the surface with the tip.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 25, 2019
- Source ID
- 10.1126/science.aay6779
Entities
People
- Andreas J. Heinrich
- Arzhang Ardavan
- Christopher P Lutz
- Kai Yang
- Philip Willke
- Soo-hyon Phark
- Taeyoung Choi
- Taner Esat
- W Paul Duprex
- Yujeong Bae
Organizations
- Engineering and Physical Sciences Research Council
- Ewha Womans University
- Institute for Basic Science
- International Business Machines Corporation (Armonk, NY)
- Office of Naval Research
- University of Oxford