Bandwidth and visibility improvement in detection of a weak signal using mode entanglement and swapping

Abstract

Quantum fluctuations constitute the primary noise barrier limiting cavity-based axion dark matter searches. In an experiment designed to mimic a real axion search, we employ a quantum-enhanced sensing technique to detect a synthetic axion-like microwave tone at an unknown frequency weakly coupled to a resonator, demonstrating a factor of 5.6 acceleration relative to a quantum-limited search for the same tone. The acceleration comes from increases to both the visibility bandwidth and the peak visibility of a detector. This speedup is achieved by dynamically coupling the resonator mode to a second (readout) mode with balanced swapping and two-mode squeezing interactions. A small fractional imbalance between the two interaction rates yields further scan rate enhancement and we demonstrate that an 8-fold acceleration can be achieved.

arXiv comment9 pages, 5 figures

References in corpus (17)

• Amplification and squeezing of quantum noise with a tunable Josephson metamaterial
• Phase preserving amplification near the quantum limit with a Josephson Ring Modulator
• A quantum-enhanced search for dark matter axions
• Observation of quantum jumps in a superconducting artificial atom
• First results from a microwave cavity axion search at 24 micro-eV
• Dispersive magnetometry with a quantum limited SQUID parametric amplifier
• 3-Wave Mixing Josephson Dipole Element
• Reaching the quantum limit of sensitivity in electron spin resonance
• Introduction to Quantum-limited Parametric Amplification of Quantum Signals with Josephson Circuits
• Optimizing the nonlinearity and dissipation of a SNAIL Parametric Amplifier for dynamic range
• The HAYSTAC Axion Search Analysis Procedure
• Non-degenerate, three-wave mixing with the Josephson ring modulator
• Kerr-free three-wave mixing in superconducting quantum circuits
• Squeezed vacuum used to accelerate the search for a weak classical signal
• Multiparametric Amplification and Qubit Measurement with a Kerr-free Josephson Ring Modulator
• Frequency-tunable Kerr-free three-wave mixing with a gradiometric SNAIL
• Axion Haloscope Array With $\mathcal{P}\mathcal{T}$ Symmetry

Cited by in corpus (11)

• Cavity Detection of Gravitational Waves: Where Do We Stand?
• Dark Matter Axion Search with HAYSTAC Phase II
• First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity
• An rf-SQUID-based traveling-wave parametric amplifier with -84 dBm input saturation power across more than one octave bandwidth
• Overcoming the fundamental limit of quantum transduction via intraband entanglement
• Quantum-Enhanced Dark Matter Search Using Cat States
• Cavity as Radio Telescope for Galactic Dark Photon
• Quantum-enhanced dark matter detection with in-cavity control: mitigating the Rayleigh curse
• Simultaneous Resonant and Broadband Detection of Ultralight Dark Matter and High-Frequency Gravitational Waves via Cavities and Circuits
• Cavity, lumped-circuit, and spin-based detection of axion dark matter: differences and similarities
• Emerging axion detection in artificial magnetoelectric materials