Red shift of the superconductivity cavity resonance in Josephson junction qubits as a direct signature of TLS population inversion

Alexander L. Burin, Moshe Schechter, Daniel Tennant +2

Quantum two-level systems (TLSs) limit the performance of superconducting qubits and superconducting and optomechanical resonators breaking down the coherence and absorbing the ene…