Circuit QED › Interactive › Pulse Simulator
InteractiveMicrowave pulsesQubit control
Pulse Simulator
Design microwave control pulses and visualise how they rotate a qubit on the Bloch sphere. Choose a pulse shape, adjust amplitude and duration, and see the resulting gate in real time.
Pulse shape
Drive axis
Parameters
Amplitude Ω₀25 MHz
Duration40 ns
Detuning Δ0 MHz
Final ⟨Z⟩
-1.000
population
Final ⟨X⟩
0.000
coherence
Rotation
178.2°
≈ X gate ✓
On-resonance Gaussian pulse. The Bloch vector rotates in the Y–Z plane. Total rotation angle θ = ∫Ω(t)dt. For a π-pulse (X gate), tune amplitude or duration until ⟨Z⟩ → –1.
Pulse shape reference
Gaussian
✓ Low spectral leakage
✗ Slower than square
Use: General qubit rotations
✗ Slower than square
Use: General qubit rotations
DRAG
✓ Suppresses |2⟩ leakage
✗ Requires β calibration
Use: High-fidelity transmon gates
✗ Requires β calibration
Use: High-fidelity transmon gates
Square
✓ Fastest, simplest
✗ Broadband — drives off-res
Use: Rough calibration, resonator drives
✗ Broadband — drives off-res
Use: Rough calibration, resonator drives
Cosine
✓ Good sidelobe suppression
✗ Slightly longer than Gaussian
Use: When neighbours are close in freq
✗ Slightly longer than Gaussian
Use: When neighbours are close in freq