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The spectral form factor near the Ehrenfest-time
Piet W. Brouwer, Saar Rahav, Chushun Tian
We calculate the Ehrenfest-time dependence of the leading quantum correction to the spectral form factor of a ballistic chaotic cavity using periodic orbit theory. For the case of…
Semiclassical theory of a quantum pump
Saar Rahav, Piet W. Brouwer
In a quantum charge pump, the periodic variation of two parameters that affect the phase of the electronic wavefunction causes the flow of a direct current. The operating mechanism…
Theory of the spin-torque-driven ferromagnetic resonance in a ferromagnet/normal-metal/ferromagnet structure
Joern N. Kupferschmidt, Shaffique Adam, Piet W. Brouwer
We present a theoretical analysis of current driven ferromagnetic resonance in a ferromagnet/normal-metal/ferromagnet tri-layer. This method of driving ferromagnetic resonance was…
Towards a semiclassical justification of the `effective random matrix theory' for transport through ballistic chaotic quantum dots
Piet W. Brouwer, Saar Rahav
The scattering matrix S of a ballistic chaotic cavity is the direct sum of a `classical' and a `quantum' part, which describe the scattering of channels with typical dwell time sma…
Multiple crossovers in interacting quantum wires
M. Kindermann, P. W. Brouwer
We study tunneling of electrons into and between interacting wires in the spin-incoherent regime subject to a magnetic field. The tunneling currents follow power laws of the applie…
The sloppy model universality class and the Vandermonde matrix
Joshua J. Waterfall, Fergal P. Casey, Ryan N. Gutenkunst +5
In a variety of contexts, physicists study complex, nonlinear models with many unknown or tunable parameters to explain experimental data. We explain why such systems so often are…
Interplay of Ehrenfest time and dephasing time in ballistic conductors
Alexander Altland, Piet W. Brouwer, Chushun Tian
Quantum interference corrections in ballistic conductors require a minimal time: the Ehrenfest time. In this letter, we investigate the fate of the interference corrections to quan…
Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires
M. Kindermann, P. W. Brouwer, A. J. Millis
We show that interference experiments can be used to identify the spin-incoherent regime of strongly interacting one-dimensional conductors. Two qualitative signatures of spin-inco…