Abstract
We discuss for the single Cooper pair box the contributions to relaxation and to decoherenee of the electromagnetic environment, of the offset charg enoise, and of a measuring Single Electron Transistor. We show that a single Cooper pair transistor can also be used for that purpose. Experimentally, we have operated such a device by measuring the variations of its critical supercurrent with the gate voltage using a SQUID series array amplifier. We describe the characteristics of this new electrometer and compare different schemes for measuring the critical current.
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Cottet, A. et al. (2001). Superconducting Electrometer for Measuring the Single Cooper Pair Box. In: Averin, D.V., Ruggiero, B., Silvestrini, P. (eds) Macroscopic Quantum Coherence and Quantum Computing. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1245-5_12
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