Research Areas - (12) Molecular Spin Qubit Quantum Sensing

Full path: Physics > Quantum Information / Computing > Spin Qubits > Molecular Spin Qubit Quantum Sensing

Department(s)/lab(s): Physics (Condensed Matter Physics Sub-department) | Quantum Spin Dynamics Group @ Oxford
Summary:

Ardavan leads the Quantum Spin Dynamics group, studying quantum coherent phenomena in condensed matter. Central to the lab's quantum sensing relevance: (1) molecular spin qubits โ€” using pulsed EPR/DEER to characterise and control multi-spin registers ({Cr7Ni} molecular rings, nitroxide radical chains) assembled into qubit networks, measuring coherence times, inter-qubit couplings, and demonstrating spin-electric coupling in molecular magnets; (2) DNA-assembled molecular quantum devices โ€” using DNA nanostructures to precisely position molecular spin qubits for multi-qubit sensing and quantum information applications; (3) surface atom spin resonance โ€” STM-based coherent spin control of individual atoms on surfaces at nanosecond timescales. Uses X-band through W-band pulsed EPR at Centre for Advanced Electron Spin Resonance (CAESR), Oxford.

Department(s)/lab(s): Biological Engineering | Bathe Lab (Laboratory for Nucleic Acid Nanotechnology) @ MIT
Summary:

PREFERRED. Bathe's lab programs DNA and RNA into custom 2D/3D nanoscale materials (DNA origami via the DAEDALUS algorithm) for applications spanning vaccines/therapeutics, massive molecular data storage, and โ€” most relevant here โ€” using DNA as a programmable scaffold to organize photonic and quantum-optical elements (mimicking quantum coherence effects seen in photosynthetic light-harvesting) and single-molecule optical biosensing.

Department(s)/lab(s): School of Chemistry | Boskovic Molecular Magnetism Group @ UMelb
Summary:

Boskovic is a synthetic inorganic chemist working on lanthanoid and polyoxometalate molecular magnets, valence tautomeric and redox-switchable complexes, and the design of molecules whose spin states can be addressed and switched. The group's relevance to quantum sensing is that these are chemically tunable spin qubits: unlike solid-state defects, their coordination environment, nuclear-spin bath and anisotropy can be designed atom by atom, which is the argument for molecular qubits as sensors. Characterisation is by SQUID magnetometry, EPR and ab initio calculation. Positioned against the established body of NV-ensemble quantum sensing work โ€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity โ€” molecular spin qubits are the chemistry community's answer to the NV centre, and DEER/pulsed-EPR protocols developed for NV ensembles at pT/sqrt(Hz) transfer more or less directly to these systems. Borderline inclusion (synthesis-led rather than sensitivity-led), kept per the inclusive rubric.

Department(s)/lab(s): Chemistry โ€“ Photon Science Institute / National EPR Facility | Bowen Group (Molecular Spin Qubits and EPR) @ Manchester
Summary:

Bowen leads the CQSE 'Spins and Qubits' theme at Manchester, focusing on organometallic molecular spin qubits for quantum sensing and computing. Research directions: (1) Organometallic La(II) and other rare-earth molecular qudits โ€” designing molecules with multiple accessible spin states (qudits) for encoding quantum information and sensing; (2) Pulsed EPR characterization โ€” Hahn echo, ESEEM, ENDOR at X/W/Q-band to measure coherence times and hyperfine couplings; (3) Integration of molecular qubits into devices โ€” surface deposition and nanoscale addressing; (4) Multi-spin sensing โ€” using exchange-coupled spin pairs as differential sensors of magnetic field gradients. Closely collaborates with Tuna and Winpenny.

Department(s)/lab(s): Electrical & Electronic Engineering โ€“ Photon Science Institute | Curry Group (Advanced Electronic Materials and Quantum Technologies) @ Manchester
Summary:

Curry's group works on advanced electronic materials with emphasis on quantum technology applications. Research directions: (1) Single-ion implantation and detection โ€” using P-NAME (Manchester's unique instrument for ion implantation at 20 nm accuracy) to deterministically place single rare-earth ions (Er3+, Pr3+) in photonic substrates for quantum memory and sensing; (2) Er:Si and Er:SiO2 photonics โ€” developing silicon-compatible Er-doped waveguides and cavities emitting at 1.5 ยตm for quantum network interfaces; (3) Colloidal quantum dots for sensing โ€” photon-number-resolved detection using InAs QDs; (4) Ion beam technologies โ€” SIMS and focused ion beam for quantum material characterization and fabrication. Access to P-NAME facility is unique in UK.

Department(s)/lab(s): Chemistry | Fataftah Lab @ UIUC
Summary:

Synthesizes and characterizes molecular magnets and metal-organic frameworks, using spectroscopy and electronic structure methods to design molecular spin qubits for quantum information science.

Department(s)/lab(s): Chemistry | Freedman Group @ MIT
Summary:

PREFERRED. Freedman uses synthetic inorganic chemistry to design molecular qubits from the electron spin of paramagnetic coordination complexes (e.g. chromium-centered complexes), giving Angstrom-scale, chemically tunable control over qubit placement and coherence for quantum sensing, communication, and metrology applications, including collaborations targeting dark-matter detection and biological/materials sensing; she directs the Institute-wide Quantum@MIT initiative.

Department(s)/lab(s): School of Chemistry | Giansiracusa Lanthanoid Magnetism Group @ UMelb
Summary:

Giansiracusa is an early-career PI (ARC DECRA) working on ytterbium and other lanthanoid single-molecule magnets, combining synthesis, magnetometry and ab initio electronic-structure calculation to understand and engineer magnetic anisotropy and spin relaxation. The stated aim of his DECRA is to move Yb-based single-molecule magnets toward real-world application, which in practice means qubit and sensor use cases where long coherence at accessible temperatures matters. Positioned against the established body of NV-ensemble quantum sensing work โ€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity โ€” the relaxation-time engineering problem he is attacking is the molecular analogue of the T1/T2 optimisation that sets pT/sqrt(Hz) performance in NV ensembles. Small, new group; a candidate would have unusual latitude but limited infrastructure.

Department(s)/lab(s): Electrical & Electronic Engineering โ€“ Photon Science Institute | Halsall Group (Photonics and Semiconductor Spectroscopy) @ Manchester
Summary:

Halsall is a senior PSI photonics researcher focusing on semiconductor spectroscopy and photonic quantum device characterization. Research directions: (1) Deep-level transient spectroscopy (DLTS) โ€” characterizing defects and impurities in semiconductor quantum device structures (Si, GaN, SiC) that are relevant to qubit coherence; (2) Photoluminescence mapping โ€” spatial mapping of optical quality in quantum well and dot wafers for quantum sensing device development; (3) InGaN/GaN quantum wells โ€” non-destructive optical characterization of LED and sensor structures; (4) THz and infrared spectroscopy โ€” contactless Hall measurements and Drude response for quantum material characterization. Provides photonic metrology tools for characterizing quantum sensing device materials.

Department(s)/lab(s): Chemistry โ€“ National Electron Paramagnetic Resonance Facility | National EPR Facility / McInnes Group @ Manchester
Summary:

McInnes leads the National EPR Facility at Manchester (Europe's broadest EPR suite) and researches molecular spin qubits. Research directions: (1) Pulsed EPR spectroscopy of molecular spin systems โ€” Hahn echo, ESEEM, ENDOR, DEER for structural and electronic characterization of inorganic and organometallic complexes; (2) Molecular spin qubits โ€” [Cu(mnt)2]ยฒโป and related molecules as candidate qubits; measuring coherence times and investigating decoherence mechanisms; (3) Multi-qubit molecular registers โ€” using exchange interactions for two-qubit gates within a molecule; (4) Magnetic sensing applications โ€” molecular systems for magnetic field sensing below the diffraction limit. Partner of NPL M4Q EPSRC Network for Materials for Quantum.