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Article Dans Une Revue Physical Review Letters Année : 2008

The Cooper Pair Pump as a Quantized Current Source

Résumé

A new charge quantization in a phase-polarized Cooper Pair Pump (CPP) is proposed, based on the topological properties of its Hamiltonian ground state over a three-dimensional parameter space $\mathbb{P}$. The charge is quantized using a set of path in $\mathbb{P}$ covering the surface of a torus, and is a multiple of the integer Chern index $c_1$ of this surface. This quantization is asymptotic but the pumped charge converges rapidly to the quantized value with the increase in the path frequency. The topological nature of the current makes this CPP implementation an excellent candidate for a metrological current standard.
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Dates et versions

hal-00184769 , version 1 (01-11-2007)

Identifiants

Citer

Raphaël Leone, Laurent Lévy, Philippe Lafarge. The Cooper Pair Pump as a Quantized Current Source. Physical Review Letters, 2008, 100, pp.117001. ⟨10.1103/PhysRevLett.100.117001⟩. ⟨hal-00184769⟩
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