Other Qubit Platforms

Superconducting resonator qubits and electron-on-helium qubits

Trapping Technique

1. Superconducting resonators: microwave photons confined in circuit cavities
2. Resonator geometry determines photon mode frequencies
3. Electron-on-helium: electrons trapped above liquid helium surface
4. Image charge from helium surface creates attractive potential
5. Electrostatic gates control electron position and energy levels
6. Extremely clean system with minimal decoherence sources

Gate Mechanism

1. Resonator qubits: microwave pulses drive photon number or phase transitions
2. Nonlinear elements (Josephson junctions) enable photon-photon interactions
3. Circuit QED: coupling resonators to superconducting qubits for gates
4. Electron-on-helium: electric field manipulation controls electron motion
5. Microwave pulses drive transitions between quantized energy levels
6. Long coherence times enable high-fidelity gate operations