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Researchers coherently control a qubit made from two electron spins

Sep 1, 2005

Jason Petta and colleagues control a quantum bit encoded in two electron spins in a double quantum dot. Fast electrical pulses manipulate the spin states, while spin-echo sequences suppress dephasing, a loss of quantum coherence.

Why it matters

Electrical control of coupled spins adds a way to manipulate semiconductor qubits, complementing the ability to read individual spin states.

Jason Petta · Charles Marcus · Harvard · UCSB

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Related

• Loss and DiVincenzo propose qubits made from single electron spins (Jan 8, 1997)
• Delft researchers electrically read an individual electron spin (Jul 22, 2004)
• Delft researchers control a single electron spin as a quantum bit (Aug 17, 2006)