Realization of a binary-outcome projection measurement of a three-level superconducting quantum system
Abstract
Binary-outcome measurements allow to determine whether a multi-level quantum system is in a certain state while preserving quantum coherence between all orthogonal states. In this paper, we explore different regimes of the dispersive readout of a three-level superconducting quantum system coupled to a microwave cavity in order to implement binary-outcome measurements. By designing identical cavity frequency shifts for the first and second excited states of the system, we realize strong projective binary-outcome measurements onto its ground state with a fidelity of . Complemented with standard microwave control and low-noise parametric amplification, this scheme enables the quantum non-demolition detection of leakage errors and can be used to create sets of compatible measurements to reveal the contextual nature of superconducting circuits.
Keywords
Cite
@article{arxiv.1510.08214,
title = {Realization of a binary-outcome projection measurement of a three-level superconducting quantum system},
author = {Markus Jerger and Pascal Macha and Andrés Rosario Hamann and Yarema Reshitnyk and Kristinn Juliusson and Arkady Fedorov},
journal= {arXiv preprint arXiv:1510.08214},
year = {2016}
}
Comments
9 pages, 4 figures