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arXiv · 2004.05486

Encircling exceptional points as a non-Hermitian extension of rapid adiabatic passage

Juraj Feilhauer·Alexander Schumer·Jörg Doppler·Alexei A. Mailybaev·Julian Böhm·Ulrich Kuhl·Nimrod Moiseyev·Stefan Rotter
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Abstract

The efficient transfer of excitations between different levels of a quantum system is a task with many applications. Among the various protocols to carry out such a state transfer in driven systems, rapid adiabatic passage (RAP) is one of the most widely used. Here we show both theoretically and experimentally that adding a suitable amount of loss to the driven Hamiltonian turns a RAP protocol into a scheme for encircling an exceptional point including the chiral state transfer associated with it. Our work thus discloses an intimate connection between a whole body of literature on RAP and recent studies on the dynamics in the vicinity of an exceptional point, which we expect to serve as a bridge between the disjoint communities working on these two scenarios.

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Juraj Feilhauer, Alexander Schumer, Jörg Doppler, Alexei A. Mailybaev, Julian Böhm, Ulrich Kuhl, Nimrod Moiseyev, Stefan Rotter. 2020-04-11. Encircling exceptional points as a non-Hermitian extension of rapid adiabatic passage. https://doi.org/10.1103/physreva.102.040201

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