Earth-Field NMR Qubit Platform

Earth-field nuclear magnetic resonance as a low-cost qubit testbed

Overview

An Earth-field NMR setup — using the ambient geomagnetic field rather than a superconducting magnet — as an accessible platform for exploring nuclear-spin qubit control and readout. Sits alongside the Paul trap (Yb+) and NV-center diamond programs as one of the lab's low-barrier quantum sensing/qubit testbeds.

Architecture

• Sample cell and polarizing coil for pre-polarization in Earth's field
• Pickup coil and low-noise preamp for free-induction-decay readout
• Pulse sequence generation for spin manipulation experiments
• Signal chain feeding into the same data pipeline used across other hardware programs

Open questions

• Achievable coherence times at Earth-field polarization strength
• Shielding requirements given the site's RF environment
• Path from spin-state readout to a usable qubit control demonstration