# Parity Detection of Propagating Microwave Fields

@article{Besse2019ParityDO, title={Parity Detection of Propagating Microwave Fields}, author={Jean-Claude Besse and Simone Gasparinetti and Michele C. Collodo and Theo Walter and Ants Remm and Jonas Krause and C. Eichler and Andreas Wallraff}, journal={arXiv: Quantum Physics}, year={2019} }

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 a decay of an excitation has occurred, information which 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… Expand

#### 11 Citations

On-demand generation and characterization of a microwave time-bin qubit

- Physics, Mathematics
- 2019

Superconducting circuits offer a scalable platform for the construction of large-scale quantum networks, where information can be encoded in multiple temporal modes of propagating microwaves.… Expand

Efficient verification of entangled continuous-variable quantum states with local measurements

- Physics
- Physical Review Research
- 2021

Continuous-variable quantum states are of particular importance in various quantum information processing tasks including quantum communication and quantum sensing. However, a bottleneck has emerged… Expand

Loss-tolerant concatenated Bell-state measurement with encoded coherent-state qubits for long-range quantum communication

- Physics
- 2021

The coherent-state qubit is a promising candidate for optical quantum information processing due to its nearly-deterministic nature of the Bell-state measurement (BSM). However, its nonorthogonality… Expand

Fast High-Fidelity Quantum Nondemolition Qubit Readout via a Nonperturbative Cross-Kerr Coupling

- Physics
- 2020

Qubit readout is an indispensable element of any quantum information processor. In this work, we experimentally demonstrate a non-perturbative cross-Kerr coupling between a transmon and a polariton… Expand

Wigner negativity in the steady-state output of a Kerr parametric oscillator

- Physics
- 2020

The output field from a continuously driven linear parametric oscillator may exhibit considerably more squeezing than the intracavity field. Inspired by this fact, we explore the nonclassical… Expand

Extraction of unknown signals in arbitrary noise.

- Mathematics, Medicine
- Physical review. E
- 2021

An exact analytic, distribution-independent form is derived for the discrete covariance matrix of cumulative distributions for independent and identically distributed noise and employ its eigenfunctions to extract unknown signals from single time series. Expand

Propagating Wigner-Negative States Generated from the Steady-State Emission of a Superconducting Qubit.

- Physics, Medicine
- Physical review letters
- 2021

The steady-state generation of propagating Wigner-negative states from a continuously driven superconducting qubit is experimentally demonstrated, reaching state-of-the-art realizations in the microwave frequency domain. Expand

Entanglement dynamics in dissipative photonic Mott insulators

- Physics
- 2020

We theoretically investigate the entanglement dynamics in photonic Mott insulators in the presence of particle losses and dephasing. We explore two configurations where entanglement is generated… Expand

Number-Resolved Photocounter for Propagating Microwave Mode

- Physics
- 2020

Detectors of propagating microwave photons have recently been realized using superconducting circuits. However a number-resolved photocounter is still missing. In this letter, we demonstrate a… Expand

Primary thermometry of propagating microwaves in the quantum regime.

- Physics
- 2020

The ability to control and measure the temperature of propagating microwave modes down to very low temperatures is indispensable for quantum information processing, and may open opportunities for… Expand

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