Background cancellation for frequency-selective quantum sensing

• URL: http://arxiv.org/abs/2601.09792v1
• Date: Wed, 14 Jan 2026 19:00:38 GMT
• Title: Background cancellation for frequency-selective quantum sensing
• Authors: Ricard Puig, Nathan Constantinides, Bharath Hebbe Madhusudhana, Daniel Bowring, C. Huerta Alderete, Andrew T. Sornborger,
• Abstract summary: Key challenge in quantum sensing is the detection of weak time dependent signals.<n>We propose a quantum sensor that leverages time independent interactions and entanglement to function as a passive, tunable, thresholded frequency filter.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A key challenge in quantum sensing is the detection of weak time dependent signals, particularly those that arise as specific frequency perturbations over a background field. Conventional methods usually demand complex dynamical control of the quantum sensor and heavy classical post-processing. We propose a quantum sensor that leverages time independent interactions and entanglement to function as a passive, tunable, thresholded frequency filter. By encoding the frequency selectivity and thresholding behavior directly into the dynamics, the sensor is responsive only to a target frequency of choice whose amplitude is above a threshold. This approach circumvents the need for complex control schemes and reduces the post-processing overhead.

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