Shot noise of a quantum dot measured with GHz stub impedance matching

Abstract

The demand for a fast high-frequency read-out of high impedance devices, such as quantum dots, necessitates impedance matching. Here we use a resonant impedance matching circuit (a stub tuner) realized by on-chip superconducting transmission lines to measure the electronic shot noise of a carbon nanotube quantum dot at a frequency close to 3 GHz in an efficient way. As compared to wide-band detection without impedance matching, the signal to noise ratio can be enhanced by as much as a factor of 800 for a device with an impedance of 100 k$\Omega$. The advantage of the stub resonator concept is the ease with which the response of the circuit can be predicted, designed and fabricated. We further demonstrate that all relevant matching circuit parameters can reliably be deduced from power reflectance measurements and then used to predict the power transmission function from the device through the circuit. The shot noise of the carbon nanotube quantum dot in the Coulomb blockade regime shows an oscillating suppression below the Schottky value of $2eI$, as well an enhancement in specific regions.

6 pages, 4 figures, supplementary

References in corpus (15)

• Full counting statistics of super-Poissonian shot noise in multi-level quantum dots
• Tunable few-electron double quantum dots and Klein tunnelling in ultra-clean carbon nanotubes
• Counting statistics and super-Poissonian noise in a quantum dot
• Tomonaga-Luttinger Liquid Features in Ballistic Single-Walled Carbon Nanotubes: Conductance and Shot Noise
• Shot Noise with Interaction Effects in Single Walled Carbon Nanotubes
• Dynamical Coulomb Blockade of Shot Noise
• Noise Correlations in a Coulomb Blockaded Quantum Dot
• Clean carbon nanotubes coupled to superconducting impedance-matching circuits
• Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes
• Stamping single wall nanotubes for circuit quantum electrodynamics
• Detecting single-electron tunneling involving virtual processes in real time
• Realization of GHz-frequency impedance matching circuits for nano-scale devices
• Optimization of sample-chip design for stub-matched radio-frequency reflectometry measurements
• Electron-phonon coupling in single walled carbon nanotubes determined by shot noise
• On-Chip Matching Networks for Radio-Frequency Single-Electron-Transistors

Cited by in corpus (15)

• A 17 GHz Molecular Rectifier
• Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
• Antibunched photons emitted by a dc biased Josephson junction
• Rapid microwave-only characterization and readout of quantum dots using multiplexed gigahertz-frequency resonators
• Nonrenewal statistics in transport through quantum dots
• Waiting time distribution revealing the internal spin dynamics in a double quantum dot
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies
• A quantum dot-based frequency multiplier
• Blocking-state influence on shot noise and conductance in quantum dots
• Full characterization of a carbon nanotube parallel double quantum dot
• Towards carbon nanotube growth into superconducting microwave resonator geometries
• Dynamical spin accumulation in large-spin magnetic molecules
• Bounds on skewness and kurtosis of steady state currents
• Current noise in quantum dot thermoelectric engines
• GHz operation of a quantum point contact using stub impedance matching circuit