Quantum-Dot-Based Resonant Exchange Qubit

Introduces and experimentally demonstrates the resonant-exchange (RX) qubit in a GaAs triple quantum dot, showing resonant electrical control at a sweet spot where average exchange sets the splitting and exchange asymmetry provides the drive.

Key Results

• First experimental RX qubit demonstration in a triple quantum dot
• Two-axis resonant control near the symmetric sweet spot
• $\pi /2$ gate time of 2.5 ns
• Multipulse-echo coherence time of 19 $\mu$s

Links

• Journal: Physical Review Letters

Zoo Links

• rx-qubit
• exchange-only-qubit
• spin-qubit