Parity Detection of Propagating Microwave Fields
Besse JC, Gasparinetti S, Collodo MC, Walter T, Remm A, Krause J, Eichler C, Wallraff A (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 10
Article Number: 011046
Journal Issue: 1
DOI: 10.1103/PhysRevX.10.011046
Abstract
The parity of the number of elementary excitations present in a quantum system provides important insights into its physical properties. Parity measurements are used, for example, to tomographically reconstruct quantum states or to determine if the decay of an excitation has occurred, information that can be used for quantum error correction in computation or communication protocols. Here, we demonstrate a versatile parity detector for propagating microwaves, which distinguishes between radiation fields containing an even or odd number n of photons, both in a single-shot measurement and without perturbing the parity of the detected field. We showcase applications of the detector for direct Wigner tomography of propagating microwaves and heralded generation of Schrödinger cat states. This parity detection scheme is applicable over a broad frequency range and may prove useful, for example, for heralded or fault-tolerant quantum communication protocols.
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Switzerland (CH)How to cite
APA:
Besse, J.-C., Gasparinetti, S., Collodo, M.C., Walter, T., Remm, A., Krause, J.,... Wallraff, A. (2020). Parity Detection of Propagating Microwave Fields. Physical Review X, 10(1). https://doi.org/10.1103/PhysRevX.10.011046
MLA:
Besse, Jean-Claude, et al. "Parity Detection of Propagating Microwave Fields." Physical Review X 10.1 (2020).
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