BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Building Small\, Fast and Hot Si Spin Qubits - Dominik Zumbühl\, 
 University of Basel
DTSTART:20220304T160000Z
DTEND:20220304T170000Z
UID:TALK170942@talks.cam.ac.uk
CONTACT:Mrs Charlotte Jenkins
DESCRIPTION:Quantum computers promise to execute complex tasks exponential
 ly faster than any possible classical computer\, Qubits based on hole spin
 s in 1D Ge/Si nanowire are predicted to experience an exceptionally strong
  yet electrically tunable spin–orbit interaction. Here we used small gat
 e voltage changes to tune the Rabi frequency and the driven coherence time
  by about a factor of 7\, and its Landé g-factor by 50%. We can thus tune
  from a fast manipulation to an idle mode\, demonstrating a spin–orbit s
 witch. Finally\, we used this control to optimize our qubit further and ap
 proach the strong driving regime\, with spin-flipping times as short as ~1
  ns.\n\nOne of the greatest challenges in quantum computing is achieving
  scalability. Classical computing previously faced a scalability issue\, s
 olved with silicon chips hosting billions of fin field-effect transistors 
 (FinFETs). Here\, we show that silicon FinFETs can host spin qubits operat
 ing above 4 K\, potentially allowing in-situ integration of qubit control 
 electronics. We achieve fast electrical control of hole spins with driving
  frequencies up to 150 MHz\, single-qubit gate fidelities at the fault-tol
 erance threshold\, and a Rabi oscillation quality factor greater than 87. 
 Our devices feature both industry compatibility and quality\, and are fabr
 icated in a flexible and agile way that should accelerate further developm
 ent.\n
LOCATION:http://tinyurl.com/domzum
END:VEVENT
END:VCALENDAR