Frequency multiplexing for readout of spin qubits

Journal Article · Mon Mar 10 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4868107· OSTI ID:22257058

Hornibrook, J. M.; Colless, J. I.; Mahoney, A. C.; Croot, X. G.; Blanvillain, S.; Lu, H.; Gossard, A. C. ^[1]

---

1. Materials Department, University of California, Santa Barbara, California 93106 (United States)

We demonstrate a low loss, chip-level frequency multiplexing scheme for readout of scaled-up spin qubit devices. By integrating separate bias tees and resonator circuits on-chip for each readout channel, we realise dispersive gate-sensing in combination with charge detection based on two radio frequency quantum point contacts. We apply this approach to perform multiplexed readout of a double quantum dot in the few-electron regime and further demonstrate operation of a 10-channel multiplexing device. Limitations for scaling spin qubit readout to large numbers of multiplexed channels are discussed.

• OSTI ID: 22257058
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QUANTUM DOTS
QUBITS
RADIOWAVE RADIATION
READOUT SYSTEMS
SPIN