Propagating Wigner-Negative States Generated from the Steady-State Emission of a Superconducting Qubit
Artikel i vetenskaplig tidskrift, 2021

We experimentally demonstrate the steady-state generation of propagating Wigner-negative states from a continuously driven superconducting qubit. We reconstruct the Wigner function of the radiation emitted into propagating modes defined by their temporal envelopes, using digital filtering. For an optimized temporal filter, we observe a large Wigner logarithmic negativity, in excess of 0.08, in agreement with theory. The fidelity between the theoretical predictions and the states generated experimentally is up to 99%, reaching state-of-the-art realizations in the microwave frequency domain. Our results provide a new way to generate and control nonclassical states, and may enable promising applications such as quantum networks and quantum computation based on waveguide quantum electrodynamics.

Författare

Yong Lu

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Ingrid Strandberg

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Isaac Fernando Quijandria Diaz

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Simone Gasparinetti

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 126 25 253602

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevLett.126.253602

PubMed

34241509

Mer information

Senast uppdaterat

2021-07-08