Stern-Gerlach Interferometry for Tests of Quantum Gravity and General Applications by Yash Lokare

“…Over the years, several proposals have been put forward that seek to use Stern-Gerlach and/or matter-wave interferometry as a tool for a myriad of applications of general interest, some of which include tests for fundamental physics (viz., quantum wave-function collapse, stringent tests for the Einstein equivalence principle at the quantum scale, breaking the Standard Quantum Limit (SQL) barrier, and so forth), precision sensing, quantum metrology, gravitational wave detection and inertial navigation. …”
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Coherent state representation of squeezing operator and its applications by Xiaojian Qiu, Jiali Huang, Zheng Fu, Fang Jia

“…Our results will be useful in preparation of quantum states and quantum metrology.…”
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Quantum assisted sensing, simulation and control by Ajoy, Ashok

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Generation and manipulation of Schrödinger cat states in Rydberg atom arrays by Omran, A, Levine, H, Keesling, A, Semeghini, G, Wang, TT, Ebadi, S, Bernien, H, Zibrov, AS, Pichler, H, Choi, S, Cui, J, Rossignolo, M, Rembold, P, Montangero, S, Calarco, T, Endres, M, Greiner, M, Vuletic, Vladan, Lukin, MD

“…We further demonstrate entanglement manipulation by using GHZ states to distribute entanglement to distant sites in the array, establishing important ingredients for quantum information processing and quantum metrology.…”
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Scaling up a quantum register of dark electronic spins in diamond by Ungar, Alexander

“…Electronic spin defects in the environment of an optically-active spin can be used to increase the size and hence the performance of solid-state quantum registers, especially for applications in quantum metrology and quantum communication. Previous works on multi-qubit electronic-spin registers in the environment of a Nitrogen-Vacancy (NV) center in diamond have only included spins directly coupled to the NV. …”
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Superconducting single-photon camera for quantum state tomography by Brosseau, Pierre, Vetlugin, Anton N., Adamo, Giorgio, Dong, Shuyu, Soci, Cesare

“…Polarization quantum states are widely used in fundamental tests of quantum mechanics, quantum key distribution and entanglement swapping, quantum metrology and quantum computing. However, the practical utility of such states is defined by the ability to characterize them quickly and reliably. …”
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Units of rotational information by Yang, Y, Chiribella, G, Hu, Q

“…Entanglement in angular momentum degrees of freedom is a precious resource for quantum metrology and control. Here we study the conversions of this resource, focusing on Bell pairs of spin-J particles, where one particle is used to probe unknown rotations and the other particle is used as reference. …”

Dynamic synthesis of Heisenberg-limited spin squeezing by Long-Gang Huang, Feng Chen, Xinwei Li, Yaohua Li, Rong Lü, Yong-Chun Liu

“…Abstract Spin squeezing is a key resource in quantum metrology, allowing improvements of measurement signal-to-noise ratio. …”
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Limitations of rotating-wave approximation in magnetic resonance: characterization and elimination of the Bloch–Siegert shift in magneto-optics by J I Sudyka, S Pustelny, W Gawlik

“…The reported study has also important implications for quantum metrology and information processing beyond RWA and standard two-state qubit dynamics.…”
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Estimating the Unruh effect via entangled many-body probes by Jieci Wang, Li Zhang, Songbai Chen, Jiliang Jing

“…We study the estimation of parameters in a quantum metrology scheme based on entangled many-body Unruh-DeWitt detectors. …”
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Quantum Optimal Control via Semi-Automatic Differentiation by Michael H. Goerz, Sebastián C. Carrasco, Vladimir S. Malinovsky

“…Thus, our approach eliminates the prohibitive memory and runtime overhead normally associated with automatic differentiation and facilitates further advancement in quantum control by enabling the direct optimization of non-analytic functionals for quantum information and quantum metrology, especially in open quantum systems. …”
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RLD Fisher information bound for multiparameter estimation of quantum channels by Vishal Katariya, Mark M Wilde

“…One of the fundamental tasks in quantum metrology is to estimate multiple parameters embedded in a noisy process, i.e. a quantum channel. …”
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Unified light-matter Floquet theory and its application to quantum communication by Georg Engelhardt, Sayan Choudhury, W. Vincent Liu

“…The PRFT potentially leads to insights in various Floquet settings including spectroscopy, thermodynamics, quantum metrology, and quantum simulations.…”
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Coplanar Antenna Design for Microwave Entangled Signals Propagating in Open Air by Tasio Gonzalez-Raya, Mikel Sanz

“…This work is relevant in the fields of microwave quantum sensing and quantum metrology with special application to the development of the quantum radar, as well as any open-air microwave quantum communication protocol.…”
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Broadband coplanar-waveguide-based impedance-transformed Josephson parametric amplifier by Bingcheng Qing, Long B. Nguyen, Xinyu Liu, Hengjiang Ren, William P. Livingston, Noah Goss, Ahmed Hajr, Trevor Chistolini, Zahra Pedramrazi, David I. Santiago, Jie Luo, Irfan Siddiqi

“…The amplification performance and simplicity of our device promise its wide adaptation in quantum metrology, quantum communication, and quantum information processing.…”
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First experimental results of the cosmic time synchronizer for a wireless, precise, and perpetual time synchronization system by Hiroyuki K.M. Tanaka, Giancarlo Cerretto, Ivan Gnesi

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Relaxation of a dense ensemble of spins in diamond under a continuous microwave driving field by Jeson Chen, Oliver Y. Chen, Huan-Cheng Chang

“…This combined investigation provides new insight into fundamental spin relaxation processes under continuous driving electromagnetic fields and paves ways to better understanding of this underexplored phenomena using single NV− centers, which have shown promising applications in quantum computing and quantum metrology.…”
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Rényi Entropies of Multidimensional Oscillator and Hydrogenic Systems with Applications to Highly Excited Rydberg States by Jesús S. Dehesa

“…At present, these special states are being shown of increasing potential interest in quantum information and the associated quantum technologies, such as e.g., quantum key distribution, quantum computation, and quantum metrology.…”
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Current Advances in Information Quantum Technologies – Critical Issues by Katarzyna Nałęcz-Charkiewicz, Jana Meles, Wioleta Rzęsa, Andrzej A. Wojciechowski, Eryk Warchulski, Kacper Kania, Justyna Stypułkowska, Grzegorz Fluder, Ryszard S. Romaniuk

“…These fields start to build their ecosystems which in the future will probably coalesce into a homogeneous quantum information layer consisting of such interconnected components as quantum internet, full size quantum computers with efficient error corrections and ultrasensitive quantum metrology nodes stationary and mobile. Today, however, the skepticism expressing many doubts about the realizability of this optimistic view fights with a cheap optimism pouring out of some popular press releases. …”
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Black-box estimation of expanding parameter for de Sitter universe by Lulu Xiao, Cuihong Wen, Jiliang Jing, Jieci Wang

“…We find that the state between separated open charts can be employed as a probe state for the black-box quantum metrology. This is nontrivial because the open charts are causally disconnected and classical information can not be exchanged between them according to the general relativity. …”
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