Quantum and tunneling capacitance in charge and spin qubits
| العنوان: | Quantum and tunneling capacitance in charge and spin qubits |
|---|---|
| المؤلفون: | R. M. Otxoa, Andreas Betz, M. F. Gonzalez-Zalba, R. Mizuta |
| المصدر: | Physical Review B |
| بيانات النشر: | American Physical Society (APS), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Spin states, Condensed matter physics, FOS: Physical sciences, Spin engineering, 02 engineering and technology, Electron, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Capacitance, Quantum capacitance, Qubit, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, 010306 general physics, 0210 nano-technology, Superconducting quantum computing, Quantum tunnelling |
| الوصف: | We present a theoretical analysis of the capacitance of a double quantum dot in the charge and spin qubit configurations probed at high-frequencies. We find that in general the total capacitance of the system consists of two state-dependent terms: The quantum capacitance arising from adiabatic charge motion and the tunnelling capacitance that appears when repopulation occurs at a rate comparable or faster than the probing frequency. The analysis of the capacitance lineshape as a function of externally controllable variables offers a way to characterize the qubits' charge and spin state as well as relevant system parameters such as charge and spin relaxation times, tunnel coupling, electron temperature and electron g-factor. Overall, our analysis provides a formalism to understand dispersive qubit-resonator interactions which can be applied to high-sensitivity and non-invasive quantum-state readout. 9 pages, 6 figures |
| تدمد: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.95.045414 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d40afa94a411be38076ecdcf55687864 https://doi.org/10.1103/physrevb.95.045414 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....d40afa94a411be38076ecdcf55687864 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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| DOI: | 10.1103/physrevb.95.045414 |