Journal
PHYSICAL REVIEW LETTERS
Volume 99, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.99.096802
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We study a charge qubit with level splitting epsilon, coupled to a quantum point contact driven by voltage V. In the limit of weak coupling, the qubit polarization shows cusps at epsilon=+/- eV. We show that, for stronger couplings, prominent peculiarities occur at fractions epsilon=+/- eV/2. Further increase of the coupling leads to a polarization corresponding to a pseudo Boltzmann distribution with an effective temperature similar to eV.
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