Qubit Purcell Effect Decay Rate Calculator
Circuit Quantum Electrodynamics (cQED): Calculate spontaneous emission decay into readout transmission lines ($\gamma_P$), Purcell-limited relaxation lifetime ($T_{1,P}$), and Purcell filter suppression factor.
Qubit & Readout Resonator Frequencies
Transmon operating frequency
Readout resonator frequency
Coupling & Resonator Linewidth
Capacitive exchange coupling
External decay to feedline
Purcell Filter Configuration
Purcell Decay Rate & Lifetime Output
Purcell-Limited Lifetime T_1:
--
microseconds (μs)
Purcell Decay Rate γ_P / 2π:
--
kHz spontaneous photon loss
Detuning Δ = |f_q - f_r|:
--
GHz separation
Dispersive Shift χ / 2π:
--
MHz readout frequency pull
| Dispersive Parameter (g / Δ): | -- |
| Unfiltered Baseline Lifetime T_1,raw: | -- |
| Filter Lifetime Enhancement: | -- |
| Readout Speed vs Coherence: | -- |
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