Charge-parity flips from quasiparticle tunneling measurably limit transmon dephasing at EJ/EC~50, and post-selecting steady-parity Ramsey shots recovers longer T2*.
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Charge sensitivity in the transmon regime
Charge-parity flips from quasiparticle tunneling measurably limit transmon dephasing at EJ/EC~50, and post-selecting steady-parity Ramsey shots recovers longer T2*.