Volume 119, Number 3, August 2017
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||23 October 2017|
Reverse PT phase transition across exceptional points of any order
1 Department of Physics and Henes Center for Quantum Phenomena, Michigan Technological University Houghton, MI, 49931, USA
2 Department of Engineering Science and Mechanics, The Pennsylvania State University University Park, PA 16802-6812, USA
Received: 21 June 2017
Accepted: 18 September 2017
We have recently demonstrated that higher-order exceptional points can be engineered in PT symmetric networks by means of recursive bosonic algebra. In these systems, as well as in simple PT dimers with second-order exceptional points, transitions between the broken and unbroken phases take place along specific trajectories in the parameter space. Here we show that the behaviour along some of these trajectories can be reversed through the inclusion of strongly coupled passive dimers that act as two-mode adiabatic bridges connecting different parts of the network. We illustrate our results by first discussing the case of a simple PT dimer before we demonstrate how the same technique can be employed in configurations that exhibit third- and fourth-order exceptional points.
PACS: 42.82.-m – Integrated optics / 42.82.Et – Waveguides, couplers, and arrays / 42.60.Da – Resonators, cavities, amplifiers, arrays, and rings
© EPLA, 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.