Technique - (24) Rabi oscillations

Type: Experimental

Description: Microwave-driven coherent spin rotations for calibration and characterization.

Department(s)/lab(s): School of Physics | Wood Diamond Magnetometry Group @ UMelb
Summary:

Wood works on NV centres in physically rotating diamond, a niche he essentially created: by spinning the crystal at tens of kHz he has demonstrated spin-rotation coupling, geometric phases and rotationally-induced pseudo-fields on NV ensembles, and used the rotating frame as a resource for noise-averaging and for gyroscopy. The group also works on conventional bulk NV magnetometry, dynamical decoupling sequence design and nuclear-spin bath engineering. Positioned against the established body of NV-ensemble quantum sensing work β€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity β€” his rotating-frame protocols are a direct attempt to extend the DEER/T1-relaxometry toolbox β€” normally applied to static ensembles at pT/sqrt(Hz) β€” into a regime where the sensor itself is in motion, with obvious relevance to inertial sensing and to averaging away static field gradients. Early-career PI, smaller group; a good option for a candidate wanting substantial independence.

Department(s)/lab(s): Physics – Institute for Quantum Electronics / PSI | Experimental Quantum Engineering Group (Xu) @ ETH Zurich
Summary:

Xu leads the Experimental Quantum Engineering group with a joint ETH–PSI appointment. Research directions: (1) Superconducting circuit quantum sensing β€” using qubits-as-sensors for detecting weak microwave signals beyond standard quantum limits, quantum non-demolition readout of photon fields; (2) Quantum error correction enabled sensing β€” integrating bosonic codes (cat qubits, binomial codes) into sensing protocols; (3) Quantum acoustics β€” coupling superconducting qubits to surface acoustic wave (SAW) resonators for hybrid quantum sensing; (4) Novel quantum hardware at PSI β€” leveraging PSI's infrastructure for cryogenic device fabrication and testing. Connected to the ETH–PSI Quantum Computing Hub.

Department(s)/lab(s): School of Electrical Engineering and Telecommunications | Yang Silicon Qubit Systems Group @ UNSW
Summary:

Yang works on the systems-level physics of silicon spin qubits: operating qubits at elevated temperatures (above one kelvin, where cryo-CMOS control electronics can be co-integrated), valley and spin-orbit engineering, and the electrical control of spin qubits without micromagnets. The 'hot qubit' programme in particular is an engineering argument about where the classical/quantum boundary should sit in a real machine. Positioned against the established body of NV-ensemble quantum sensing work β€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity β€” raising the operating temperature of a spin sensor while preserving coherence is the same trade a pT/sqrt(Hz) NV ensemble makes implicitly by working at room temperature; Yang's work is the silicon community's attempt to buy back some of that convenience. Borderline inclusion β€” this is quantum computing rather than sensing β€” retained under the inclusive rubric.

Techniques:
Department(s)/lab(s): Physics | Yelin Group @ Harvard
Summary:

Yelin is a theorist in quantum optics and quantum information whose work includes coherent line-narrowing theory for diamond NV centers, superradiant/cooperative effects in Rydberg systems and molecular ensembles, and quantum control of ultracold polar molecules. Included as theoretical support underpinning several quantum-sensing platforms (NV coherence, superradiant clocks) rather than as an experimentalist herself; she holds a joint appointment at the University of Connecticut.