A5021489350- Atomic and Subatomic Physics Research
- Diamond and Carbon-based Materials Research
- Mechanical and Optical Resonators
- Advanced Frequency and Time Standards
- Quantum, superfluid, helium dynamics
- Electronic and Structural Properties of Oxides
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Dark Matter and Cosmic Phenomena
- Quantum and electron transport phenomena
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Geophysics and Sensor Technology
- Fusion materials and technologies
- Magnetic Field Sensors Techniques
- Advanced Sensor Technologies Research
- Electron and X-Ray Spectroscopy Techniques
- Non-Destructive Testing Techniques
- Earthquake Detection and Analysis
- Quantum optics and atomic interactions
- Spectroscopy and Quantum Chemical Studies
- Nuclear reactor physics and engineering
- Electron Spin Resonance Studies
- Advanced Memory and Neural Computing
- Quantum Chromodynamics and Particle Interactions
University of Stuttgart
2021-2023
Center for Integrated Quantum Science and Technology
2021-2023
Max Planck Institute for Solid State Research
2023
Excellence Cluster Universe
2016-2019
Technical University of Munich
2016-2019
Abstract Diamond quantum sensors are sensitive to weak microwave magnetic fields resonant the spin transitions. However, spectral resolution in such protocols is ultimately limited by sensor lifetime. Here, we demonstrate a heterodyne detection method for microwaves (MW) leading lifetime independent GHz range. We reference MW signal local oscillator generating initial superposition state from coherent source. Experimentally, achieve below 1 Hz 4 far limit of kilohertz. Furthermore, show...
We report results of a new technique to measure the electric dipole moment $^{129}\mathrm{Xe}$ with $^{3}\mathrm{He}$ comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred measurement cell, and transported into magnetically shielded room, where SQUID magnetometers detect free precession in applied magnetic fields. The result from one week campaign 2017 2.5 2018, combined detailed study systematic effects, is...
Conventional nonlinear spectroscopy, which use classical probes, can only access a limited set of correlations in quantum system. Here we demonstrate that sensor and object are first entangled the is measured along chosen basis, extract arbitrary types orders We fourth-order single nuclear spins cannot be conventional using sequential weak measurement via nitrogen-vacancy center diamond. The spectroscopy provides fingerprint features to identify different objects, such as Gaussian noises,...
Quantum sensors are keeping the cutting-edge sensitivities in metrology. However, for high-sensitive measurements of arbitrary signals, limitations linear dynamic range could introduce distortions when sensing frequency, magnitude and phase unknown signals. Here, we overcome these with advanced protocol that combines quantum phase-sensitive detection heterodyne readout. We present theoretical experimental investigations using nitrogen-vacancy centers diamond, showing ability to sense radio...
Abstract Nitrogen vacancy (NV) centers are a major platform for the detection of nuclear magnetic resonance (NMR) signals at nanoscale. To overcome intrinsic electron spin lifetime limit in spectral resolution, heterodyne approach is widely used. However, application this technique high fields yet an unsolved problem. Here, we introduce method utilizing series phase coherent double sensing blocks, thus eliminating numerous Rabi microwave pulses required detection. Our protocol can be...
Polarized nuclei are a powerful tool in nuclear-spin studies and the search for physics beyond standard model. Systems which compare two nuclear species have thus far been limited by anomalous yet reproducible frequency variations of unknown origin. We studied self-interactions $^{3}\mathrm{He}\ensuremath{-}^{129}\mathrm{Xe}$ system independently addressing, controlling, measuring influence each component polarization. Our results directly rule out prior explanations shifts demonstrate...
The ability to track and control the dynamics of a quantum system is key technology. Despite its central role, quantitative reconstruction single from macroscopic data associated observable remains problem. We consider this problem in context weak measurements nuclear carbon spin diamond with an electron as meter at room temperature, which well-controlled understandable bipartite system. In work, based on detailed theoretical analysis model experiment, we study relationship between...
Abstract The quantum Fourier transformation (QFT) is a key building block for whole wealth of algorithms. Despite its proven efficiency, only few proof-of-principle demonstrations have been reported. Here we utilize QFT to enhance the performance sensor. We implement algorithm in hybrid register consisting nitrogen-vacancy (NV) center electron spin and three nuclear spins. runs on spins serves process sensor—i.e., NV signal. Specifically, show application correlation spectroscopy, where long...
We report results of a new technique to measure the electric dipole moment $^{129}$Xe with $^3$He comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred measurement cell, and transported into magnetically shielded room, where SQUID magnetometers detect free precession in applied magnetic fields. The result from one week campaign 2017 2.5 2018, combined detailed study systematic effects, is $d_A(^{129}\mathrm{Xe}) = (1.4 \pm 6.6_\mathrm{stat}...
Abstract Ideal projective quantum measurement makes the system state collapse in one of observable operator eigenstates <?CDATA $|\phi_\alpha\rangle$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mo>|</mml:mo> </mml:mrow> <mml:msub> <mml:mi>ϕ</mml:mi> <mml:mi>α</mml:mi> </mml:msub> <mml:mo fence="false" stretchy="false">⟩</mml:mo> </mml:math> , making it a powerful tool for preparing desired pure state. Nevertheless, experimental realisations...
Nanoscale nuclear magnetic resonance (NMR) signals can be measured through hyperfine interaction to paramagnetic electron sensor spins. A heterodyne approach is widely used overcome the spin lifetime limit in spectral resolution. It uses a series of modified Hahn echo pulse sequences applied coherently with precession signal resulting subsampled NMR signal. Due challenges applying high Rabi frequencies its application limited low fields, thus full potential method not yet exploited at...
We describe a new technique to measure the EDM of $^{129}$Xe with $^3$He comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred measurement cell, and transported into magnetically shielded room, where SQUID magnetometers detect free precession in applied electric magnetic fields. The result one week run combined detailed study systematic effects is $d_A(^{129}\mathrm{Xe}) = (0.26 \pm 2.33_\mathrm{stat} 0.72_\mathrm{syst})\times10^{-27}~e\,\mathrm{cm}$....
Abstract Nitrogen vacancy (NV) centers are a major platform for the detection of nuclear magnetic resonance (NMR) signals on nanoscale. To overcome intrinsic electron spin lifetime limit in spectral resolution heterodyne approach is widely used. However, application this technique at high fields (> 0.1 T) yet an unsolved problem. Here we introduce method utilizing series phase coherent double sensing blocks, thus eliminating need numerous Rabi microwave pulses scheme. As result our...
Ideal projective quantum measurement makes the system state collapse in one of observable operator eigenstates $|\phi_\alpha\rangle$, making it a powerful tool for preparing desired pure state. Nevertheless, experimental realisations are not ideal. During time needed to overcome classical noise apparatus, is often (slightly) perturbed, which compromises fidelity initialisation. In this paper, we propose an analytical model analyse initialisation performed by single-shot readout. We derive...
Abstract Quantum sensors are keeping the cutting-edge sensitivities in metrology. However, for high-sensitive measurements of arbitrary signals, limitations linear dynamic range could introduce distortions when sensing frequency, magnitude and phase unknown signals. Here, we overcome these with advanced protocol that combines quantum phase-sensitive detection heterodyne readout. We present theoretical experimental investigations using nitrogen-vacancy centers diamond, showing ability to...
The ability to follow the dynamics of a quantum system in quantitative manner is key importance for technology. Despite its central role, justifiable deduction single terms macroscopical observable remains challenge. Here we show that relation between readout signal electron spin and nuclear given by parameter related measurement strength. We determine this strength independent experiments use value compare our analysis with experimental results. prove validity approach measuring violations...