A system for measuring auto- and cross-correlation of current noise at low temperatures

Abstract

We describe the construction and operation of a two-channel noise detection system for measuring power and cross spectral densities of current fluctuations near 2 MHz in electronic devices at low temperatures. The system employs cryogenic amplification and fast-Fourier-transform based spectral measurement. The gain and electron temperature are calibrated using Johnson noise thermometry. Full shot noise of 100 pA can be resolved with an integration time of 10 s. We report a demonstration measurement of bias-dependent current noise in a gate defined GaAs/AlGaAs quantum point contact.

arXiv commentrelated papers at http://marcuslab.harvard.edu

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• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Noise Correlations in a Coulomb Blockaded Quantum Dot
• Fluctuation Theorem and Microreversibility in a Quantum Coherent Conductor
• Development of high frequency and wide bandwidth Johnson noise thermometry
• Amplifier for scanning tunneling microscopy at MHz frequencies
• Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes
• Bolometric Detection of Quantum Shot Noise in Coupled Mesoscopic Systems
• Photon-assisted shot noise in graphene in the Terahertz range
• Quantum Fluctuation of the Quantum Geometric Tensor and its Manifestation as Intrinsic Hall Signatures in Time-Reversal Invariant Systems
• Spin-dependent shot noise enhancement in a quantum dot
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• Fast and accurate shot noise measurements on atomic-size junctions in the MHz regime
• Charge fluctuations and feedback effect in shot noise in a Y-terminal system
• What Can We Learn from Noise? -- Mesoscopic Nonequilibrium Statistical Physics --
• Observation of finite excess noise in the voltage-biased quantum Hall regime as a precursor for breakdown
• Electron-hole scattering limited transport of Dirac fermions in a topological insulator
• Cryogenic differential amplifier for NMR applications
• Single-electron $G^{(2)}$ function at nonzero temperatures
• Temperature dependence of the visibility in an electronic Mach-Zehnder interferometer
• Cryogenic GaAs high-electron-mobility-transistor amplifier for current noise measurements
• Strongly correlated charge transport in silicon MOSFET quantum dots
• Quantum noise in carbon nanotubes as a probe of correlations in the Kondo regime
• Momentum and position detection in nanoelectromechanical systems beyond Born and Markov approximations
• Fast time-domain current measurement for quantum dot charge sensing using a homemade cryogenic transimpedance amplifier
• Noise of a superconducting magnetic flux sensor based on a proximity Josephson junction
• Universal departure from Johnson-Nyquist relation caused by limited resolution
• Design and Analysis on a Cryogenic Current Amplifier with a Superconducting Microwave Resonator
• Current cross-correlation spectroscopy of Majorana bound states