Quantum-enhanced noise sensing

Talk

Quantum sensing has emerged as one of the most promising near-term quantum applications. It has implications ranging from detecting gravitational waves to non-invasively probing biological systems and searching for dark matter. While previous works mostly focus on quantum enhancement in sensing deterministic signals, less is known about the fundamental limits in probing noise and correlation functions. In this talk, I will examine the question: Does quantum entanglement help detect noise? After a brief introduction to the methods and fundamental limits of noise sensing, I will describe how entangled sensors can outperform their unentangled counterparts in sensing spatial noise correlations. Such sensitivity enhancement can grow exponentially with the number of probe sensors when the readout and reset are slow. I will also discuss how nontrivial temporal noise correlation may impact the nature of entanglement advantage in this setting. These results open a novel pathway toward achieving entanglement-based sensing advantage in spectroscopic measurements, which have implications for a wide range of applications in physics, chemistry, materials science, and secure communications.

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