Search for dissertations about: "shot noise"
Showing result 1 - 5 of 31 swedish dissertations containing the words shot noise.
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1. Noise Properties of the Single Electron Transistor
Abstract : The Single Electron Transistor (SET) is a sensitive electrometer with a charge sensitivityultimately limited by noise. In this thesis we present measurements of noiseproperties and charge sensitivity of the radio-frequency Single Electron Transistor. READ MORE
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2. Fluctuations in Mesoscopic Constrictions
Abstract : In normal and superconducting quantum point contacts there are several sources of fluctuations. Thermally activated impurities in the vicinity of the junction cause the current (or voltage) to change with a typical frequency of the order of one Hz up to a few kHz. READ MORE
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3. Development of Cryogenic Low Noise 4-8 GHz HEMT Amplifier and its Advanced Characterization
Abstract : In most radio astronomy instrumentation, cryogenic low noise amplifiers (LNA) are used as intermediate frequency (IF) amplifiers. The system noise temperature is among the most important parameters of a receiver and requires state of the art components. READ MORE
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4. Fluctuations and nonequilibrium thermodynamics in electronic nanosystems
Abstract : In the last decades thermodynamics has seen a resurgence because of the interesting phenomena that happen in small-scale systems. Indeed, in nanoscale devices, quantum effects and fluctuations cannot generally be neglected and influence both the transport and their thermodynamic performance. READ MORE
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5. Mid- and near-infrared NICE-OHMS : techniques for ultra-sensitive detection of molecules in gas phase
Abstract : Noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) is a technique for ultra-sensitive detection of molecular absorption and dispersion. For highest performance, the technique combines cavity enhancement (CE) with frequency modulation (FM); while the former increases the effective interaction length between the light and the analyte by several orders of magnitudes, the latter removes the in-coupling of 1/f noise and makes the signals background free. READ MORE