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From: "TalentQ" <javier.bouzas.arufe@usc.es>

Subject: [qipc.spain] QS Seminar | March 25th @4pm | Richard R. Allen (MIT)

Date: 17. March 2025 at 10:31:51 CET

To: qipc.spain@listas.csic.es

Reply-To: "TalentQ" <javier.bouzas.arufe@usc.es>

Speaker: Richard R. Allen | PhD student at MIT

Title: Quantum Computing Enhanced Sensing

Abstract: Quantum computing and quantum sensing represent two distinct
frontiers of quantum information science. In this work, we harness quantum
computing to solve a fundamental and practically important sensing problem:
the detection of weak oscillating fields with unknown strength and frequency.
We present a quantum computing enhanced sensing protocol that outperforms all
existing approaches. Furthermore, we prove our approach is optimal by
establishing the Grover-Heisenberg limit — a fundamental lower bound on the
minimum sensing time. The key idea is to robustly digitize the continuous,
analog signal into a discrete operation, which is then integrated into a
quantum algorithm. Our metrological gain originates from quantum computation,
distinguishing our protocol from conventional sensing approaches. Indeed, we
prove that broad classes of protocols based on quantum Fisher information,
finite-lifetime quantum memory, or classical signal processing are strictly
less powerful. Our protocol is compatible with multiple experimental
platforms. We propose and analyze a proof-of-principle experiment using
nitrogen-vacancy centers, where meaningful improvements are achievable using
current technology. This work establishes quantum computation as a powerful
new resource for advancing sensing capabilities.

Registration:
https://urldefense.com/v3/__https://events.teams.microsoft.com/event/0c8cf2a4-a9c9-4d2f-956a-26aa172e40b3@8f0d452c-b7a4-4964-b810-8c397374477b__;!!D9dNQwwGXtA!Qrs0izN5X-Vzmupxaewrm15h1c4me-nRgVgTmgve79T-96Xzxd0eVuOHJTpAujId9FNE2tWkPse-NlXz4uDENss7-3KMQBE$