AER/Inorganic Seminar – Ashlyn Belton
About the event
Speaker: Ashlyn Belton
Group: Dr. Kevin Kittilstved
Title: Application of Semiconductor Spin Defects for Quantum Computing
Quantum information science is a quickly advancing field that exploits the quantum mechanical properties of spins to produce a superposition of states where multiple states coexist simultaneously. The ability of researchers to harness spins has great potential in sensing and computing. By leveraging superposition, complex problems can be solved in a fraction of the time required by classical computers. Unfortunately, due to the large error rates and rapid loss (decoherence) of the quantum superposition of states, current-day quantum computers have only been realized at cryogenic temperatures. Thus, creation of scalable and robust quantum bits (the fundamental unit in a quantum computer) with higher operating temperatures and longer spin coherence times is critical to the development of quantum information science.
Optically addressable spin defects in semiconductor host lattices are promising qubit platforms because of their tunable properties and compatibility with current semiconductor manufacturing techniques. Leading qubit candidates within this class of materials include the nitrogen vacancy center in diamond and the divacancy center in silicon carbide. While these systems are well understood, the application of these materials in quantum computers is limited by short quantum coherence times. Current efforts to enhance coherence times include modifying the host lattice material and the application of dynamic decoupling sequences (applying fast microwave pulses to refocus the qubit). In this presentation, I will explore common methods used to determine spin relaxation times and will highlight recent achievements in extending coherence times and achieving high-fidelity control of spin defects in semiconductor materials.
References:
ADDIN ZOTERO_BIBL
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