Quantum microwave parametric interferometer
arXiv:2303.01026 · doi:10.1103/PhysRevApplied.20.024049
Abstract
Classical interferometers are indispensable tools for the precise determination of various physical quantities. Their accuracy is bound by the standard quantum limit. This limit can be overcome by using quantum states or nonlinear quantum elements. Here, we present the experimental study of a nonlinear Josephson interferometer operating in the microwave regime. Our quantum microwave parametric interferometer (QUMPI) is based on superconducting flux-driven Josephson parametric amplifiers combined with linear microwave elements. We perform a systematic analysis of the implemented QUMPI. We find that its Gaussian interferometric power exceeds the shot-noise limit and observe sub-Poissonian photon statistics in the output modes. Furthermore, we identify a low-gain operation regime of the QUMPI which is essential for optimal quantum measurements in quantum illumination protocols.
arXiv comment6 pages, 5 figures
References in corpus (31)
- Quantum sensing
- Advances in Quantum Metrology
- Quantum information with continuous variables
- Quantum metrology
- Quantum Key Distribution with High Loss: Toward Global Secure Communication
- The classical-quantum boundary for correlations: discord and related measures
- A gravitational wave observatory operating beyond the quantum shot-noise limit: Squeezed light in application
- Squeezed states of light and their applications in laser interferometers
- Microwave Quantum Illumination
- Quantum Illumination at the Microwave Wavelengths
- Experimental realisation of quantum illumination
- Entanglement-Enhanced Sensing in a Lossy and Noisy Environment
- Quantum discord determines the interferometric power of quantum states
- Gaussian-state quantum-illumination receivers for target detection
- Generating Entangled Microwave Radiation Over Two Transmission Lines
- Photon State Tomography for Two-Mode Correlated Itinerant Microwave Fields
- Interaction-based quantum metrology showing scaling beyond the Heisenberg limit
- Path Entanglement of Continuous-Variable Quantum Microwaves
- Entanglement's Benefit Survives an Entanglement-Breaking Channel
- Quantum Entangled Interferometers
- Secure quantum remote state preparation of squeezed microwave states
- Search for Dark Matter Axions with CAST-CAPP
- Planck Spectroscopy and the Quantum Noise of Microwave Beam Splitters
- Displacement of propagating squeezed microwave states
- Experimental quantum teleportation of propagating microwaves
- Gaussian interferometric power
- Quantum illumination reveals phase-shift inducing cloaking
- Finite-time quantum entanglement in propagating squeezed microwaves
- Quantum-Enhanced Transmittance Sensing
- Homodyning the of Gaussian states
- Flow of quantum correlations in noisy two-mode squeezed microwave states