Article
Materials Science, Multidisciplinary
Kevin Slagle, David Aasen, Hannes Pichler, Roger S. K. Mong, Paul Fendley, Xie Chen, Manuel Endres, Jason Alicea
Summary: In this study focusing on the Ising transition, a detailed link between microscopics and low-energy physics emerging at criticality is established by constructing lattice incarnations of primary fields in the underlying Ising CFT and computing correlations of microscopic Rydberg operators. The research further determines how Ising fields evolve when four-fermion couplings drive an instability to Ising tricriticality. The results pave the way for a thorough experimental characterization of Ising criticality in Rydberg arrays and can inform the design of novel higher-dimensional phases based on coupled critical chains.
Article
Chemistry, Physical
Yu-Xiao Jiang, Jia-Xin Yin, M. Michael Denner, Nana Shumiya, Brenden R. Ortiz, Gang Xu, Zurab Guguchia, Junyi He, Md Shafayat Hossain, Xiaoxiong Liu, Jacob Ruff, Linus Kautzsch, Songtian S. Zhang, Guoqing Chang, Ilya Belopolski, Qi Zhang, Tyler A. Cochran, Daniel Multer, Maksim Litskevich, Zi-Jia Cheng, Xian P. Yang, Ziqiang Wang, Ronny Thomale, Titus Neupert, Stephen D. Wilson, M. Zahid Hasan
Summary: The study reveals an unconventional chiral charge order in KV3Sb5, a material with both a topological band structure and a superconducting ground state, using high-resolution scanning tunnelling microscopy. A 2 x 2 superlattice structure is observed in the experiment, along with an energy gap opening and charge modulation across the Fermi level.
Article
Physics, Multidisciplinary
Anna Delmonte, Alba Crescente, Matteo Carrega, Dario Ferraro, Maura Sassetti
Summary: The study indicates that Fock states lead to better performance for the battery, while coherent states, despite stronger energy fluctuations, can almost completely extract the stored energy in a short period of time.
Article
Biochemical Research Methods
Markku Kuismin, Mikko J. Sillanpaa
Summary: The article presents a new Monte Carlo Penalty Selection method (MCPeSe) for Glasso regularization parameter selection, combining the scalability and low computational cost of frequentist Glasso with the ability to automatically choose the regularization by Bayesian Glasso modeling.
Review
Physics, Multidisciplinary
M. Pechal, G. Salis, M. Ganzhorn, D. J. Egger, M. Werninghaus, S. Filipp
Summary: This paper discusses the control and measurement capabilities of hidden qubits in certain physical architectures where direct addressability is lacking. It demonstrates full control and measurement capabilities in a superconducting two-qubit device with local single-qubit control and iSWAP and controlled-phase two-qubit interactions enabled by a tunable coupler. The iterative tune-up process for characterizing gate sets used for quantum process tomography and evaluating gate fidelities is also introduced.
Article
Quantum Science & Technology
Pedro Ripper, Gustavo Amaral, Guilherme Temporao
Summary: This article investigates whether a tool called Swap Test can be used to identify decoherence in a quantum computer in an implementation-agnostic way. Simulations and experimental results show that a modified version of a Toffoli Swap Test can replace full quantum process tomography, consuming less computational resources. Additionally, it can simulate a quantum optical communication link employing two-photon interference on a generic quantum computer.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Payden Brown, Houlong Zhuang
Summary: This study prepares for the future challenge in discovering new high-entropy alloys (HEAs) by using a quantum computer simulator and quantum processors. The testing accuracy using a quantum computer is comparable to that of a classical artificial neural network (ANN), while slightly lower accuracy is obtained when using quantum processors. This work demonstrates the feasibility of employing fledgling quantum computers in the noisy intermediate-scale quantum (NISQ) era for HEA discovery.
Article
Physics, Multidisciplinary
Alessandro Candeloro, Sholeh Razavian, Matteo Piccolini, Berihu Teklu, Stefano Olivares, Matteo G. A. Paris
Summary: The paper explores the characterization of nonlinear media using quantum probes, showing that squeezed probes can improve precision in estimating parameters. The study demonstrates that quantum probes can enhance precision and optimize squeezing fractions for different energy probes.
Article
Multidisciplinary Sciences
Sebastian Geier, Nithiwadee Thaicharoen, Clement Hainaut, Titus Franz, Andre Salzinger, Annika Tebben, David Grimshandl, Gerhard Zurn, Matthias Weidemuller
Summary: Controlling interactions is crucial in quantum engineering of many-body systems. By applying time-periodic driving, a natural many-body Hamiltonian can be transformed into an effective target Hamiltonian with different dynamics. Demonstration in an experimental setting shows modification of relaxation behavior of total spin by changing symmetry properties of the effective Hamiltonian through spin manipulations.
Article
Multidisciplinary Sciences
Ronan Zimmermann, Martin Steppan, Johannes Zimmermann, Lara Oeltjen, Marc Birkholzer, Klaus Schmeck, Kirstin Goth
Summary: The LoPF-Q 12-18 is a questionnaire designed for clinical use and early detection of personality disorders. It assesses personality functioning in adolescents aged 12 and above. Study findings show that a bifactor model and a hierarchical model demonstrate the best factorial structure. The short version of LoPF-Q 12-18, derived using the ant colony optimization algorithm, has excellent fit and high clinical validity and utility for detecting personality disorder patients.
Article
Multidisciplinary Sciences
Fiifi Amoako Johnson
Summary: Childhood stunting in Ghana exhibits geospatial clustering, with varying levels of stunting in different regions. Socio-demographic factors are primarily associated with clustering of districts with high childhood stunting, while socio-ecological factors are mainly associated with clustering of districts with low childhood stunting. Nonlinear associations were found between childhood stunting and socio-ecological factors such as Insecticide Treated Net (ITN) coverage, nightlight composite, travel time to a main settlement, and population density.
Article
Optics
Miha Papic, Ines de Vega
Summary: This paper demonstrates how to infer information about the environment that generates 1/f noise in superconducting qubits based on a single measurement of qubit coherence. By using a machine learning algorithm, the parameters of impurities in the environment can be reconstructed and different environment models can be distinguished, which paves the way for a better understanding of 1/f noise in superconducting circuits.
Article
Quantum Science & Technology
Si-Si Gu, Bao-Chuan Wang, Ming-Bo Chen, Ting Lin, Yuan Kang, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: The integration of quantum dots with a microwave resonator in the hybrid circuit quantum electrodynamics architecture has created a controllable artificial system and enriched physics through electron-photon interaction. The study investigates a hybrid device where a triple quantum dot is dipole coupled with the electric field of a superconducting quantum interference device array resonator. The results suggest that the hybrid system has the potential to investigate exotic many-body effects and matter-light interaction, depending on the relationship between various Coulomb energy in the quantum dot and the cavity photon energy.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Neurosciences
Ana Portelo, Youssef Shiban, Tiago V. Maia
Summary: Mathematical models accurately characterize fear changes during exposure therapy and can predict treatment outcomes.
BIOLOGICAL PSYCHIATRY-COGNITIVE NEUROSCIENCE AND NEUROIMAGING
(2021)
Article
Optics
Neha Pathania, Tabish Qureshi
Summary: This article discusses the application of Bohr's complementarity principle in both single-particle and two-particle interference. It proposes a duality relation based on particle distinguishability and interference visibility and argues that the Hong-Ou-Mandel (HOM) effect and the Hanbury-Brown-Twiss (HBT) effect are equivalent and can be treated as a single two-particle interference phenomenon.
Article
Multidisciplinary Sciences
Mateusz T. Madzik, Serwan Asaad, Akram Youssry, Benjamin Joecker, Kenneth M. Rudinger, Erik Nielsen, Kevin C. Young, Timothy J. Proctor, Andrew D. Baczewski, Arne Laucht, Vivien Schmitt, Fay E. Hudson, Kohei M. Itoh, Alexander M. Jakob, Brett C. Johnson, David N. Jamieson, Andrew S. Dzurak, Christopher Ferrie, Robin Blume-Kohout, Andrea Morello
Summary: This study demonstrates universal quantum logic operations using nuclear spins in a silicon nanoelectronic device, achieving high-fidelity entangled states. The precise characterization of quantum operations shows that nuclear spins are approaching the performance required for fault-tolerant quantum processors. Additionally, the entanglement between nuclear spins and electron spins is also demonstrated. The results establish a viable route for scalable quantum information processing using donor nuclear and electron spins.
Article
Physics, Multidisciplinary
Timothy Proctor, Kenneth Rudinger, Kevin Young, Erik Nielsen, Robin Blume-Kohout
Summary: Quantum computers exhibit considerable performance variations across different architectures, limited by hardware errors which make accurately predicting their capabilities difficult. Current benchmarks lack flexibility, but scalable benchmarks using circuit mirroring techniques can be constructed, revealing that standard error metrics are poor predictors of program success on hardware, and processors differ widely in sensitivity to program structure.
Article
Physics, Applied
Kenneth Rudinger, Guilhem J. Ribeill, Luke C. G. Govia, Matthew Ware, Erik Nielsen, Kevin Young, Thomas A. Ohki, Robin Blume-Kohout, Timothy Proctor
Summary: Midcircuit measurements are an important primitive in quantum computing, especially for quantum error correction. In this study, we used quantum instrument linear gate set tomography (QILGST) technique to characterize dispersive measurements on a superconducting Transmon qubit and investigate the impact of residual cavity photon population on measurement error.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Timothy Proctor, Stefan Seritan, Kenneth Rudinger, Erik Nielsen, Robin Blume-Kohout, Kevin Young
Summary: In this study, a simple and customizable class of circuits called randomized mirror circuits is shown to enable scalable, robust, and flexible randomized benchmarking of Clifford gates. Through simulations and experiments, the feasibility and scalability of the technique are demonstrated, and its capability of detecting and quantifying crosstalk errors in many-qubit circuits is validated.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Akel Hashim, Stefan Seritan, Timothy Proctor, Kenneth Rudinger, Noah Goss, Ravi K. Naik, John Mark Kreikebaum, David I. Santiago, Irfan Siddiqi
Summary: It is found that under randomized compiling (RC), the errors of quantum gates can be accurately described by a stochastic Pauli noise model without coherent errors, and spatially correlated coherent errors and non-Markovian errors are strongly suppressed. The average and worst-case error rates are equal for randomly compiled gates, and the maximum worst-case error for the gate set is measured to be 0.0197(3) using gate set tomography.
NPJ QUANTUM INFORMATION
(2023)
Article
Quantum Science & Technology
Robin Blume-Kohout, Marcus P. da Silva, Erik Nielsen, Timothy Proctor, Kenneth Rudinger, Mohan Sarovar, Kevin Young
Summary: This study presents a method for modeling errors in quantum logic gates, by transforming the process matrix of a gate into a more useful error generator. A variety of reduced models for gate errors can be built by combining elementary error generators.
Article
Optics
Antonio E. Russo, William M. Kirby, Kenneth M. Rudinger, Andrew D. Baczewski, Shelby Kimmel
Summary: The extension to the robust phase estimation protocol can identify incorrect results outside the expected statistical range. Consistency checks are provided to indicate violations of noise thresholds, helping identify when further estimates in the robust phase estimation process should not be trusted.
