Parity Detection of Propagating Microwave Fields
Artikel i vetenskaplig tidskrift, 2020

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 Schrodinger 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.

Författare

Jean-Claude Besse

Eidgenössische Technische Hochschule Zürich (ETH)

Simone Gasparinetti

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Michele C. Collodo

Eidgenössische Technische Hochschule Zürich (ETH)

Theo Walter

Eidgenössische Technische Hochschule Zürich (ETH)

Ants Remm

Eidgenössische Technische Hochschule Zürich (ETH)

Jonas Krause

Eidgenössische Technische Hochschule Zürich (ETH)

Christopher Eichler

Eidgenössische Technische Hochschule Zürich (ETH)

Andreas Wallraff

Eidgenössische Technische Hochschule Zürich (ETH)

Physical Review X

2160-3308 (ISSN)

Vol. 10 1 011046

Ämneskategorier

Acceleratorfysik och instrumentering

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1103/PhysRevX.10.011046

Mer information

Senast uppdaterat

2020-07-03