Article
Quantum Science & Technology
Paul C. Jerger, Yu-Xin Wang, Mykyta Onizhuk, Benjamin S. Soloway, Michael T. Solomon, Christopher Egerstrom, F. Joseph Heremans, Giulia Galli, Aashish A. Clerk, David D. Awschalom
Summary: Single-qubit sensing protocols can measure qubit-bath coupling parameters. However, the sensing protocol itself can perturb the bath, causing a quantum quench effect. This study observed the bath perturbation in a nitrogen-vacancy (NV) center by measuring the phase-resolved spin-echo of the nuclear spin bath. The relationship between the sensor phase and the Gaussian spin-bath polarization was derived to optimize the transfer efficiency of the dynamic nuclear polarization sequence.
Article
Physics, Applied
Robert D. McMichael, Sergey Dushenko, Sean M. Blakley
Summary: The paper introduces a sequential Bayesian experiment design protocol for optimizing efficiency in Ramsey measurements, comparing it to other protocols. The Bayesian design is shown to be 2-5 times faster when estimating a single parameter, and converges four times faster when estimating four parameters, compared to other methods.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Pengcheng Fan, Heng Yuan, Lixia Xu, Jixing Zhang, Guodong Bian, Mingxin Li, Zhuo Wang
Summary: The adjusted Carr-Purcell-Meiboom-Gill sequence was used to detect C-13 nuclear spin signals coupled to a negatively-charged nitrogen-vacancy center in diamond, achieving high resolution detection. The improved frequency resolution and coherence dips width offer a promising approach to enhance the identification of nuclear spins in coupled electron-nuclear spin systems. The adjusted method can also be applied to other dynamical decoupling sequences for further improvement in spin detection.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Joshua Foo, Estelle Asmodelle, Austin P. Lund, Timothy C. Ralph
Summary: Bohmian mechanics is a nonlocal hidden-variable interpretation of quantum theory that predicts deterministic trajectories for particles in spacetime. This study proposes an approach to construct relativistic Bohmian-type velocity field and applies it to obtain relativistic spacetime trajectories of photons in a Michelson-Sagnac interferometer.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Mike Filius, Sung Hyun Kim, Ivo Severins, Chirlmin Joo
Summary: The research team introduced a new method that allows for determining multiple distances between FRET pairs in a single object by resolving the FRET efficiency of multiple fluorophore pairs through transient binding of short DNA strands. This FRET X technology is expected to be a tool for high-resolution analysis of biomolecules and nanostructures.
Article
Biochemistry & Molecular Biology
Aline Acke, Siska Van Belle, Boris Louis, Raffaele Vitale, Susana Rocha, Thierry Voet, Zeger Debyser, Johan Hofkens
Summary: Interactions between epigenetic readers and histone modifications are crucial in gene expression regulation. We have developed a method called Expansion Microscopy for Epigenetics (ExEpi) that preserves spatial information and improves resolution, allowing the study of epigenetic interactions and drug discovery.
NUCLEIC ACIDS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Andreas P. Cuny, K. Tanuj Sapra, David Martinez-Martin, Gotthold Flaschner, Jonathan D. Adams, Sascha Martin, Christoph Gerber, Fabian Rudolf, Daniel J. Mueller
Summary: The regulation of cell growth is of great significance in physiology, biotechnology, and medicine. However, monitoring the mass and growth of individual cells with high resolution is challenging. In this study, the authors modified a cell balance technique to monitor the proliferation of single yeast cells in real-time. They found that the mass of single yeast cells increases in linear segments of constant growth rates. This technology has the potential to directly and accurately monitor the growth of single cells throughout their cycle.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Dan Yudilevich, Rainer Stoehr, Andrej Denisenko, Amit Finkler
Summary: This study demonstrates a method for mapping the positions of single electron spins using an external rotating magnetic field in the vicinity of a quantum spin sensor. By modulating the dipolar coupling with a proximate electron spin, the coordinates of the spin can be extracted, achieving nanometer precision localization.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Binjie Zheng, Junzhuan Wang, Tianye Huang, Xin Su, Yi Shi, Xiaomu Wang
Summary: This study presents a BP-based single-detector spectrometer with high spectral and temporal resolutions for dynamic molecular fingerprint analysis.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Krishna C. Polavaram, Nishant Garg
Summary: A newly developed Raman imaging protocol is capable of mapping unpolished samples with an auto-focusing Z-mapping feature for direct fingerprinting of different polymorphs. The methodology for generating high-fidelity phase maps using characteristic peak intensity ratios can be extended to any multi-phase, heterogenous system. These enhancements allow rapid mapping of unpolished granite specimens with high accuracy and fine spatial resolution.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
A. Koszorus, M. Block, P. Campbell, B. Cheal, R. P. de Groote, W. Gins, I. D. Moore, A. Ortiz-Cortes, A. Raggio, J. Warbinek
Summary: High-precision hyperfine structure measurements were conducted on stable, singly-charged Co-59 ions at the IGISOL facility in Jyv & auml;skyl & auml;, Finland using collinear laser spectroscopy. A newly installed light collection setup allowed for the study of transitions in the 230 nm wavelength range from low-lying states below 6000 cm(-1). A 100-fold improvement in the precision of the hyperfine A parameters is reported, along with the presentation of newly measured hyperfine B parameters.
SCIENTIFIC REPORTS
(2023)
Review
Biochemistry & Molecular Biology
Hyun-Kyu Choi, Hyun Gyu Kim, Min Ju Shon, Tae-Young Yoon
Summary: Single-molecule magnetic tweezers provide magnetic force and torque to single target molecules, allowing the study of dynamic changes in biomolecular structures and interactions. Using smaller magnetic beads and shorter tethers improves dynamic response times and measurement precision. High-resolution single-molecule magnetic tweezers can track nanometer changes in target molecules on a millisecond time scale.
ANNUAL REVIEW OF BIOCHEMISTRY
(2022)
Article
Optics
Dayong Wang, Duoxuan Ma, Kunlun Li, Yaya Zhang, Jie Zhao, Yunxin Wang, Lu Rong
Summary: In this study, total internal reflection THz digital holography is proposed and applied for measuring the dynamic refractive index (RI) distributions of solid and liquid samples. The method utilizes a prism with a pitching angle and calculates the angle and field of view from the spectrogram of the off-axis Fresnel hologram. The full-field RI distributions of solid-state soy wax and distilled water droplets are obtained, and the evaporation of an ethanol solution droplet is recorded with a temporal resolution of 10 Hz.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Houzhu Zhang, Jinhong Chen
Summary: Fluid content computed from nuclear magnetic resonance (NMR) is a reliable tool for petrophysical property estimation, while high spatial resolution NMR (HSR-NMR) offers a new solution for core analysis. Challenges remain in inverting HSR-NMR data due to the heterogeneities of magnetic fields.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Multidisciplinary
Victor Montenegro, Gareth Sion Jones, Sougato Bose, Abolfazl Bayat
Summary: This study introduces a new method to achieve quantum-enhanced sensitivity in a many-body probe by utilizing the nature of quantum measurement without prior entanglement. By performing a sequence of local measurements, the sensing precision can be improved, reaching the Heisenberg limit.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Arne Goetze, Nico Striegler, Alastair Marshall, Philipp Neumann, Christian Giese, Patricia Quellmalz, Peter Knittel
Summary: The process of creating NV centers on single-crystalline diamond microstructures by chemical vapor deposition (CVD) allows for control of the NV center positions, resulting in exclusive generation of NV centers on the {111} pyramid side faces and preferential alignment in a single {111} direction with a T 2 time of 55 µs.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Chen Zhang, Durga Dasari, Matthias Widmann, Jonas Meinel, Vadim Vorobyov, Polina Kapitanova, Elizaveta Nenasheva, Kazuo Nakamura, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Joerg Wrachtrup
Summary: Quantum sensors are known for their high sensitivity, but this often comes at the expense of other parameters. This study proposes a distortion-free quantum sensing protocol that combines quantum phase-sensitive detection with heterodyne readout, and demonstrates its capabilities using NV centers for reconstructing audio frequency signals.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Gang-Qin Liu, Ren-Bao Liu, Quan Li
Summary: Nanothermometry is in high demand for various research fields. The ideal thermometer should have reliable temperature interpretation, high sensitivity, fast response, and applicability in various environments. Diamond with NV centers shows promise for nanothermometry due to its sharp resonances and multimodal sensing capabilities. However, the sensitivity and temperature range of NV-based nanothermometry still need improvement. This Account focuses on enhancing the sensitivity and working temperature range of diamond-based nanothermometry through transducer-based concepts and hybrid structures.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Energy & Fuels
Xiaodong Tang, Wanfen Pu, Dan Wang, Shanshan Qu, Yiming Rui, Xuepei Zhao, Renbao Liu
Summary: This study thoroughly investigates the non-isothermal oxidation characteristics of natural gas, focusing on methane. By conducting experiments using an accelerating rate calorimeter (ARC), the oxidation characteristics and kinetic parameters under different conditions are analyzed. The results show that there is no uniform self-exothermic phenomenon under depleted conditions and rock debris has a catalytic effect on methane oxidation. Based on the experimental results, it is suggested to raise the temperature near the wellhole of gas reservoirs to achieve successful and stable combustion.
Article
Neurosciences
Chen Zhang, Jixing Zhang, Matthias Widmann, Magnus Benke, Michael Kuebler, Durga Dasari, Thomas Klotz, Leonardo Gizzi, Oliver Roehrle, Philipp Brenner, Joerg Wrachtrup
Summary: Magnetometers based on color centers in diamond exhibit excellent performance in sensitivity, bandwidth, dynamic range, and spatial resolution, making them widely applicable in various fields from biology and chemistry to industry. This study discusses the potential benefits of using these magnetometers for Magnetomyography (MMG) and Magnetoneurography (MNG) applications by analyzing sensitivity, dynamic range, and bandwidth, and comparing them to state-of-the-art techniques.
FRONTIERS IN NEUROSCIENCE
(2023)
Article
Physics, Multidisciplinary
Durga Bhaktavatsala Rao Dasari
Summary: We use exact calculations to analyze the thermodynamical effects of depolarizing a zero-temperature quantum spin-bath with a quantum probe coupled to an infinite temperature bath. The induced correlations in the bath during the depolarizing process prevent the bath's entropy from increasing to its maximum limit, but the energy deposited in the bath can be extracted completely in a finite time. We investigate these findings using a solvable central spin model, demonstrating that destroying unwanted correlations enhances the rate of energy extraction and entropy towards their limiting values. These studies have implications for quantum battery research, particularly in understanding battery performance during charging and discharging processes.
Article
Chemistry, Multidisciplinary
Jeffrey Neethi Neethirajan, Toni Hache, Domenico Paone, Dinesh Pinto, Andrej Denisenko, Rainer Stoehr, Peter Udvarhelyi, Anton Pershin, Adam Gali, Joerg Wrachtrup, Klaus Kern, Aparajita Singha
Summary: Near-surface negatively charged nitrogen vacancy (NV) centers show promise for magnetic imaging and quantum sensing, but their charge-state instabilities decrease fluorescence and NV coherence time, negatively affecting imaging sensitivity. In this study, we demonstrate that in situ adsorption of H2O on the diamond surface can partially recover the performance of shallow NV sensors. Controlled surface treatments are essential for implementing NV-based quantum sensing protocols under cryogenic ultrahigh vacuum conditions, as supported by band-bending calculations.
Article
Physics, Multidisciplinary
Yang Shen, Ping Wang, Chun Tung Cheung, Joerg Wrachtrup, Ren-Bao Liu, Sen Yang
Summary: Extracting useful signals is crucial for both classical and quantum technologies. Conventional noise filtering methods, limited in their application scope, rely on different patterns of signal and noise in frequency or time domains, while our proposed signal-nature-based approach leverages the intrinsic quantum nature of the system to single out quantum signals. We demonstrate the extraction of quantum correlation signals and the ability to separate the signal of a remote nuclear spin from overwhelming classical noise backgrounds, which is not achievable by conventional filter methods. Our work highlights the importance of quantum or classical nature as a new degree of freedom in quantum sensing and opens up new directions for quantum research.
PHYSICAL REVIEW LETTERS
(2023)
Correction
Physics, Multidisciplinary
Thomas Wolf, Philipp Neumann, Kazuo Nakamura, Hitoshi Sumiya, Takeshi Ohshima, Junichi Isoya, Joerg Wrachtrup
Article
Physics, Applied
Kin On Ho, Man Yin Leung, Wenyan Wang, Jianyu Xie, King Yau Yip, Jiahao Wu, Swee K. Goh, Andrej Denisenko, Joerg Wrachtrup, Sen Yang
Summary: High-pressure experiments play a crucial role in interdisciplinary research fields, but local probing techniques are limited due to the confinement of pressure chamber. The negatively charged nitrogen-vacancy (N-V) center has emerged as a versatile quantum sensor in pressurized environments. In this work, we compare the stress environments and performance of implanted N-V centers (IN-Vs) and N-V-enriched nanodiamonds (NDs) in a diamond anvil cell (DAC), revealing significant differences in stress tensors. We also propose methods to extend the working pressure of quantum sensing and explore more applications of the N-V center under pressure.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Ping Wang, Wen Yang, Renbao Liu
Summary: We propose a method for constructing projective measurement of nonconserved nuclear spin through a weakly coupled auxiliary electron spin. The method involves applying suitable quantum control on the electron to create a weak quantum nondemolition measurement on the nuclear spin, which can then be cascaded into a projective measurement. We identify tunable parameters to select the appropriate observables and control the strength of the weak measurement, and demonstrate its stability against experimental control errors.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Shravan Kumar Parthasarathy, Birgit Kallinger, Florian Kaiser, Patrick Berwian, Durga B. R. Dasari, Jochen Friedrich, Roland Nagy
Summary: A solid-state spin system using 4H silicon carbide has the potential to achieve highly coherent qubit registers for scalable quantum computing. By controlling isotope concentration and performing coherent control, a scalable nuclear-spin register capable of independent qubit control and mutual controlled operations is achieved. Furthermore, decoherence and entanglement analysis can be used to evaluate the quantum volume of these nodes, leading to the realization of scalable quantum memory nodes for distributed quantum computing networks and quantum information protocols.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Vadim V. Vorobyov, Jonas Meinel, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Oleg Gulinsky, Joerg Wrachtrup
Summary: The ability to track and control the dynamics of a quantum system is crucial for quantum technology, but reconstructing the dynamics of a single quantum system from macroscopic data remains a challenging problem. In this study, we use weak measurements with an electron spin as a meter to track a single nuclear carbon spin in a diamond at room temperature. Through theoretical analysis and experiments, we establish the relationship between the statistical properties of the macroscopic readout signal of the electron spin and the quantum dynamics of the nucleus, and successfully reconstruct the quantum correlation using a measurement parameter. We validate our approach using the Leggett-Garg test.
Article
Optics
Wen -Long Ma, Shu-Shen Li, Ren-Bao Liu
Summary: This paper investigates the relationship between projective measurements and generalized quantum measurements, and provides a proof that projective measurements can be constructed from sequential generalized measurements under certain conditions. The paper also proposes a specific scheme for constructing projective measurements of a quantum system using sequential generalized measurements, and shows that a single ancilla qubit is sufficient for mediating sequential generalized measurements to construct arbitrary projective measurements.
