CTQM Theory Colloquium

Johnson noise thermometry using ohmic and hydrodynamic electrons

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Abstract: Current through a resistor exhibits temperature-dependent white noise fluctuations called Johnson-Nyquist noise. For a 2D electron system, measuring the magnitude of these fluctuations provides a direct measurement of the electron temperature, and thereby enables a novel method for inferring specific heat and thermal conductivity. Here I present three general theoretical results about Johnson noise thermometry in both the ohmic and hydrodynamic limits.

Semi-Classical Physics at Large Quantum Numbers

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Lunch is provided at 12:00 pm before the talk.

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Abstract:  In recent years it has been shown that strongly coupled many body systems become analytically tractable in the regime of large quantum numbers, such as large spin or large charge. We will review these developments and present applications to the theory of critical exponents.