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31 papers
Quantum Heterodyne Sensing of Nuclear Spins via Double Resonance
Jonas Meinel, Minsik Kwon, Durga Dasari +5
Nanoscale nuclear magnetic resonance (NMR) signals can be measured through hyperfine interaction to paramagnetic electron sensor spins. A heterodyne approach is widely used to over…
Quantum-assisted Distortion-free audio signal sensing
Chen Zhang, Durga Dasari, Matthias Widmann +9
Quantum sensors are keeping the cutting-edge sensitivities in metrology. However, for high-sensitive measurements of arbitrary signals, limitations in linear dynamic range could in…
Quantum nonlinear spectroscopy of single nuclear spins
Jonas Meinel, Vadim Vorobyov, Ping Wang +7
Nonlinear spectroscopy is widely used for studying physical systems. Conventional nonlinear optical spectroscopy and magnetic resonance spectroscopy, which use classical probes suc…
The Transition from Quantum to Classical in weak measurements and reconstruction of Quantum Correlation
Vadim Vorobyov, Jonas Meinel, Hitoshi Sumiya +4
The ability to follow the dynamics of a quantum system in a quantitative manner is of key importance for quantum technology. Despite its central role, justifiable deduction of the…
Integrated and portable magnetometer based on nitrogen-vacancy ensembles in diamond
Felix M. Stürner, Andreas Brenneis, Thomas Buck +13
Magnetic field sensors that exploit quantum effects have shown that they can outperform classical sensors in terms of sensitivity enabling a range of novel applications in future,…
Diamond magnetometry and gradiometry towards subpicotesla DC field measurement
Chen Zhang, Farida Shagieva, Matthias Widmann +11
Nitrogen vacancy (NV) centers in diamond have developed into a powerful solid-state platform for compact quantum sensors. However, high sensitivity measurements usually come with a…
Heterodyne Sensing of Microwaves with a Quantum Sensor
Jonas Meinel, Vadim Vorobyov, Boris Yavkin +5
Diamond quantum sensors are sensitive to weak microwave magnetic fields resonant to the spin transitions. However the spectral resolution in such protocols is limited ultimately by…
Photoluminescence at the ground state level anticrossing of the nitrogen-vacancy center in diamond
Viktor Ivády, Huijie Zheng, Arne Wickenbrock +9
The nitrogen-vacancy center (NV center) in diamond at magnetic fields corresponding to the ground state level anticrossing (GSLAC) region gives rise to rich photoluminescence (PL)…
Detection and control of single proton spins in a thin layer of diamond grown by chemical vapor deposition
Kento Sasaki, Hideyuki Watanabe, Hitoshi Sumiya +2
We report detection and coherent control of a single proton nuclear spin using an electronic spin of the nitrogen-vacancy (NV) center in diamond as a quantum sensor. In addition to…
Quantum Metrology with Strongly Interacting Spin Systems
Hengyun Zhou, Joonhee Choi, Soonwon Choi +10
Quantum metrology makes use of coherent superpositions to detect weak signals. While in principle the sensitivity can be improved by increasing the density of sensing particles, in…
Microwave-free vector magnetometry with nitrogen-vacancy centers along a single axis in diamond
Huijie Zheng, Zhiyin Sun, Georgios Chatzidrosos +8
Sensing vector magnetic fields is critical to many applications in fundamental physics, bioimaging, and material science. Magnetic-field sensors exploiting nitrogen-vacancy (NV) ce…
Robust and accurate electric field sensing with solid state spin ensembles
Julia Michl, Jakob Steiner, Andrej Denisenko +8
Electron spins in solids constitute remarkable quantum sensors. Individual defect centers in diamond were used to detect individual nuclear spins with nanometer scale resolution, a…
Zero-field magnetometry based on nitrogen-vacancy ensembles in diamond
Huijie Zheng, Jingyan Xu, Geoffrey Iwata +10
Ensembles of nitrogen-vacancy (NV) centers in diamonds are widely utilized for magnetometry, magnetic-field imaging and magnetic-resonance detection. They have not been used for ma…
Probing quantum thermalization of a disordered dipolar spin ensemble with discrete time-crystalline order
Joonhee Choi, Hengyun Zhou, Soonwon Choi +8
We investigate thermalization dynamics of a driven dipolar many-body quantum system through the stability of discrete time crystalline order. Using periodic driving of electronic s…
High-resolution spectroscopy of single nuclear spins via sequential weak measurements
Matthias Pfender, Ping Wang, Hitoshi Sumiya +8
Quantum sensors have recently achieved to detect the magnetic moment of few or single nuclear spins and measure their magnetic resonance (NMR) signal. However, the spectral resolut…
Enhancing fluorescence excitation and collection from the nitrogen-vacancy center in diamond through a micro-concave mirror
Dewen Duan, Vinaya Kumar Kavatamane, Sri Ranjini Arumugam +7
We experimentally demonstrate a simple and robust optical fibers based method to achieve simultaneously efficient excitation and fluorescence collection from Nitrogen-Vacancy (NV)…
Superradiant Hybrid Quantum Devices
Andreas Angerer, Kirill Streltsov, Thomas Astner +7
Superradiance is the archetypical collective phenomenon where radiation is amplified by the coherence of emitters. It plays a prominent role in optics, where it enables the design…
Loop-gap Microwave Resonator for Hybrid Quantum Systems
Jason Ball, Yu Yamashiro, Hitoshi Sumiya +5
We designed a loop-gap microwave resonator for applications of spin-based hybrid quantum systems, and tested it with impurity spins in diamond. Strong coupling with ensembles of ni…
Solid-state electron spin lifetime limited by phononic vacuum modes
Thomas Astner, Johannes Gugler, Andreas Angerer +10
Longitudinal relaxation is the process by which an excited spin ensemble decays into its thermal equilibrium with the environment. In solid-state spin systems relaxation into the p…
Observation of discrete time-crystalline order in a disordered dipolar many-body system
Soonwon Choi, Joonhee Choi, Renate Landig +11
Understanding quantum dynamics away from equilibrium is an outstanding challenge in the modern physical sciences. It is well known that out-of-equilibrium systems can display a ric…
Nonvolatile quantum memory enables sensor unlimited nanoscale spectroscopy of finite quantum systems
Matthias Pfender, Nabeel Aslam, Hitoshi Sumiya +5
In nanoscale metrology applications, measurements are commonly limited by the performance of the sensor. Here we show that in nuclear magnetic resonance (NMR) spectroscopy measurem…
Critical thermalization of a disordered dipolar spin system in diamond
Georg Kucsko, Soonwon Choi, Joonhee Choi +10
Statistical mechanics underlies our understanding of macroscopic quantum systems. It is based on the assumption that out-of-equilibrium systems rapidly approach their equilibrium s…
Depolarization dynamics in a strongly interacting solid-state spin ensemble
Joonhee Choi, Soonwon Choi, Georg Kucsko +9
We study the depolarization dynamics of a dense ensemble of dipolar interacting spins, associated with nitrogen-vacancy centers in diamond. We observe anomalously fast, density-dep…
Collective Strong Coupling with Homogeneous Rabi Frequencies using a 3D Lumped Element Microwave Resonator
Andreas Angerer, Thomas Astner, Daniel Wirtitsch +5
We design and implement 3D lumped element microwave cavities for the coherent and uniform coupling to electron spins hosted by nitrogen vacancy centers in diamond. Our design spati…