Readout methods and devices for Josephson-junction-based solid-state qubits

G. Johansson*, L. Tornberg, V. S. Shumeiko, G. Wendin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We discuss the current situation concerning measurement and readout of Josephson-junction based qubits. In particular, we focus attention on dispersive low-dissipation techniques involving reflection of radiation from an oscillator circuit coupled to a qubit, allowing single-shot determination of the state of the qubit. In particular, we develop a formalism describing a charge qubit read out by measuring its effective (quantum) capacitance. To exemplify, we also give explicit formulas for the readout time.

Original languageEnglish
Article numberS14
Pages (from-to)S901-S920
JournalJournal of Physics Condensed Matter
Issue number21
StatePublished - 31 May 2006
Externally publishedYes


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