Robust Dynamic Hamiltonian Engineering of Many-Body Spin Systems

Choi, Joonhee; Zhou, Hao; Knowles, Helena S.; Landig, Renate; Choi, Soonwon; Lukin, Mikhail D.

doi:10.1103/physrevx.10.031002

Cited by 108 publications

(77 citation statements)

References 153 publications

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“…S15 for pulse sequence diagram) before and after surface modification. YY-8 sequences were chosen for their robustness to pulse errors and the ability to suppress spurious signals from nearby nuclear spins ( 24 – 26 ). The observed coherence follows a stretched exponential exp[−( t / T 2 ) n ], with T 2 = 47 μs before and T 2 = 31 μs after the functionalization (the exponent n in Fig.…”

Section: Qubit Coherencementioning

confidence: 99%

Biocompatible surface functionalization architecture for a diamond quantum sensor

Xie

Rodgers

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Quantum metrology enables some of the most precise measurements. In the life sciences, diamond-based quantum sensing has led to a new class of biophysical sensors and diagnostic devices that are being investigated as a platform for cancer screening and ultrasensitive immunoassays. However, a broader application in the life sciences based on nanoscale NMR spectroscopy has been hampered by the need to interface highly sensitive quantum bit (qubit) sensors with their biological targets. Here, we demonstrate an approach that combines quantum engineering with single-molecule biophysics to immobilize individual proteins and DNA molecules on the surface of a bulk diamond crystal that hosts coherent nitrogen vacancy qubit sensors. Our thin (sub–5 nm) functionalization architecture provides precise control over the biomolecule adsorption density and results in near-surface qubit coherence approaching 100 μs. The developed architecture remains chemically stable under physiological conditions for over 5 d, making our technique compatible with most biophysical and biomedical applications.

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Section: Qubit Coherencementioning

confidence: 99%

Biocompatible surface functionalization architecture for a diamond quantum sensor

Xie

Rodgers

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…However, ensembles of NV − centers may result in a more subtle field sensitivity when more advanced data acquisition techniques have been utilized 76 . Recent work has focused on creating more sophisticated DD sequences that can suppress both disorder and interaction effects between NV − centers 77 . Another important advance has been magnetic resonance imaging by NV − centers at the nanoscale by combining DD sequences with pulsed field gradients 78 …”

Section: Techniquesmentioning

confidence: 99%

Novel color center platforms enabling fundamental scientific discovery

Norman

Majety

Wang

et al. 2020

InfoMat

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Color centers are versatile systems that generate quantum light, sense magnetic fields and produce spin‐photon entanglement. We review how these properties have pushed the limits of fundamental knowledge in a variety of scientific disciplines, from rejecting local‐realistic theories to sensing superconducting phase transitions. In the light of recent progress in material processing and device fabrication, we identify new opportunities for interdisciplinary fundamental discoveries in physics and geochemistry.

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“…In this work, we propose sequences of phased RAP pulses for dynamical decoupling (DD) and sensing of an AC field, where the signal can be sensed in systems with large field inhomogeneity and varying transition frequencies. This is especially important for sensing in NV containing nanodiamonds in cells, which have different atom orientations with respect to the quantization axis, low-temperature experiments when heating limits the applicable Rabi frequency, e.g., in SiV centers [53,54], ensembles of NV centers with high concentration and inhomogeneous broadening [55,56], rare-earth doped solids [34,[40][41][42]50]. Other applications include experiments with high field inhomogeneities, e.g., due to geometry, stray fields or amplitude noise.…”

Section: Introductionmentioning

confidence: 99%

Efficient and robust signal sensing by sequences of adiabatic chirped pulses

Genov

Ben-Shalom

Jelezko

et al. 2020

Phys. Rev. Research

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We propose a scheme for sensing of an oscillating field in systems with large inhomogeneous broadening and driving field variation by applying sequences of phased, adiabatic, chirped pulses. These act as a double filter for dynamical decoupling, where the adiabatic changes of the mixing angle during the pulses rectify the signal and partially remove frequency noise. The sudden changes between the pulses act as instantaneous π pulses in the adiabatic basis for additional noise suppression. We also use the pulses' phases to correct for other errors, e.g., due to nonadiabatic couplings. Our technique improves significantly the coherence time in comparison to standard XY8 dynamical decoupling in realistic simulations in NV centers with large inhomogeneous broadening. Beyond the theoretical proposal, we also present proof-of-principle experimental results for quantum sensing of an oscillating field in NV centers in diamond, demonstrating superior performance compared to the standard technique.

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Robust Dynamic Hamiltonian Engineering of Many-Body Spin Systems

Cited by 108 publications

References 153 publications

Biocompatible surface functionalization architecture for a diamond quantum sensor

Biocompatible surface functionalization architecture for a diamond quantum sensor

Novel color center platforms enabling fundamental scientific discovery

Efficient and robust signal sensing by sequences of adiabatic chirped pulses

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