In disordered superconductors carrying a dc supercurrent, TLS coupling to ac fields is parametrically enhanced at low ω, producing enhanced real ac conductivity and 1/f equilibrium current noise when TLS relaxation times are broadly distributed.
Two -level systems in superconducting quantum devices due to trapped quasiparticles,
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Multilevel anharmonic transmon probes extract more quantum Fisher information about temperature than qubit probes, with bounded anharmonic models confirming robustness beyond the Duffing regime.
A new class of superconducting tunable resonators enables fast, low-loss magnetometry at milli-kelvin temperatures with MHz sampling rates.
citing papers explorer
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Properties of two level systems in current-carrying superconductors
In disordered superconductors carrying a dc supercurrent, TLS coupling to ac fields is parametrically enhanced at low ω, producing enhanced real ac conductivity and 1/f equilibrium current noise when TLS relaxation times are broadly distributed.
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Thermometry with multilevel transmon probes
Multilevel anharmonic transmon probes extract more quantum Fisher information about temperature than qubit probes, with bounded anharmonic models confirming robustness beyond the Duffing regime.
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Tunable Resonator Integrated Magnetometry
A new class of superconducting tunable resonators enables fast, low-loss magnetometry at milli-kelvin temperatures with MHz sampling rates.