Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Full frequency voltage noise spectral density of a single electron
  transistor   We calculate the full frequency spectral density of voltage fluctuations in a
Single Electron Transistor (SET), used as an electrometer biased above the
Coulomb threshold so that the current through the SET is carried by sequential
tunnel events. We consider both a normal state SET and a superconducting SET.
The whole spectrum from low frequency telegraph noise to quantum noise at
frequencies comparable to the SET charging energy $(E_{C}/\hbar)$, and high
frequency Nyquist noise is described. We take the energy exchange between the
SET and the measured system into account using a real-time diagrammatic Keldysh
technique. The voltage fluctuations determine the back-action of the SET onto
the measured system and we specifically discuss the case of superconducting
charge qubit read-out and measuring the so-called Coulomb staircase of a single
Cooper pair box.

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The categories of this paper are: econ
31
The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
3
The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph