Article
Chemistry, Physical
Haina Wang, Frank H. Stillinger, Salvatore Torquato
Summary: The Zhang-Torquato conjecture states that any realizable set of pair statistics, whether from a nonequilibrium or equilibrium system, can be achieved by equilibrium systems involving up to two-body interactions. The study shows that the unit-step function g(2) can be easily realized within a certain range of densities. For higher dimensions, the maximum terminal packing fraction can be achieved, and the large-r behaviors of the effective potentials are given by approximate expressions based on known conditions. These findings are important for the design of novel nanoparticle systems with density-dependent effective potentials, including exotic hyperuniform states of matter.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Optics
Paolo Molignini, Camille Leveque, Hans Kessler, Dieter Jaksch, R. Chitra, Axel U. J. Lode
Summary: This study investigates the infinite-range interactions in a one-dimensional boson array mediated by a laser-driven dissipative optical cavity. The results show that, at high laser pump powers, observables including density distributions, correlation functions, and superradiance order parameters become identical for both bosons and fermions. The study also reveals the compensation effect of cavity-mediated interactions on the reduction in the strength of contact interactions needed to trigger crystallization.
Article
Chemistry, Multidisciplinary
Mubin He, Dongyu Li, Zheng Zheng, Hequn Zhang, Tianxiang Wu, Weihang Geng, Zhengwu Hu, Zhe Feng, Shiyi Peng, Liang Zhu, Wang Xi, Dan Zhu, Ben Zhong Tang, Jun Qian
Summary: This study proposes a method that combines skull optical clearing (SOC) technique and three-photon fluorescence microscopy (3PM) to overcome the scattering effects of the skull and brain tissue, enabling observation of deep microvasculature and neuronal structures. By using visible-NIR-II compatible skull optical clearing agents and a bright aggregation-induced emission (AIE) nanoprobe with large three-photon absorption cross section, the researchers achieved the largest cerebrovascular and neuronal imaging depth to date.
Article
Optics
Hui-min Zhao, Xiao-jun Zhang, M. Artoni, G. c. la Rocca, Jin-hui Wu
Summary: Strongly correlated photon pairs can be generated with high rates and brightnesses using enhanced nonlocal optical nonlinearities in cold atoms, leading to a dark state with a large population imbalance. This scheme works with resonant light fields, while minimizing linear absorption and Raman gain.
Article
Nanoscience & Nanotechnology
Zhujing Xu, Zubin Jacob, Tongcang Li
Summary: Vacuum frictional torque on a barium strontium titanate (BST) nanosphere near a BST surface has been studied, showing a large enhancement of the vacuum friction through resonant photon tunneling. The calculated vacuum frictional torques at resonances at sub-GHz and GHz frequencies are promising to be observed experimentally. Furthermore, vacuum friction on a rotating sphere near a layered surface can be further enhanced by optimizing the thickness of the thin-film coating.
Article
Astronomy & Astrophysics
Ruairi Brett, Chris Culver, Maxim Mai, Andrei Alexandru, Michael Doring, Frank X. Lee
Summary: In this study, a fit of the finite-volume QCD spectrum of three pions at maximal isospin was performed to constrain the three-body force. Results indicate consistency with a constant contact term close to zero for heavier pion mass, while showing statistically significant energy dependence for lighter mass. The findings also suggest the potential to constrain the two-body amplitude with sufficient three-body energy levels.
Article
Physics, Condensed Matter
Jiyuan Bai, Minqian Chen, Changjie Zhou, Yadong Li, Kongfa Chen, Zelong He
Summary: In this study, we designed and investigated an A-B interferometer with different embedded quantum dot structures to achieve controlled spin-polarized transport. Our results demonstrate that the introduction of an external field has a significant impact on the transmission coefficient and current characteristics, which can be controlled by adjusting relevant parameters for spin-polarized transport.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Physics, Applied
V. A. Sevriuk, W. Liu, J. Ronkko, H. Hsu, F. Marxer, T. F. Morstedt, M. Partanen, J. Rabina, M. Venkatesh, J. Hotari, L. Gronberg, J. Heinsoo, T. Li, J. Tuorila, K. W. Chan, J. Hassel, K. Y. Tan, M. Mottonen
Summary: In this research, the authors present their recent results on a qubit reset scheme based on a quantum-circuit refrigerator. They use photon-assisted quasiparticle tunneling to decrease the energy relaxation time of the qubit during operation. The experiment involves a transmon qubit with dispersive readout, and the reset is achieved through capacitively coupling the qubit to the quantum-circuit refrigerator.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Damon James Carrad, Lukas Stampfer, Dags Olsteins, Christian Emmanuel Noes Petersen, Sabbir A. Khan, Peter Krogstrup, Thomas Sand Jespersen
Summary: Semiconductor/superconductor hybrids have been studied to explore novel physics and develop new technologies. In this study, Josephson junctions defined by shadow epitaxy on InAsSb/Al nanowires were investigated. The devices exhibited gate-tunable supercurrents at low temperatures and multiple Andreev reflections at finite voltage bias. Under microwave irradiation, characteristic oscillating sidebands at quantized energies were observed, which confirmed a recently suggested modification of a classical equation. The measurements provided evidence for the effective charge transferred by the tunneling process and suggested photon-assisted tunneling as a powerful method for identifying low-energy spectral features in hybrid Josephson devices.
Article
Chemistry, Physical
Kai-Xuan Xu, Ziren Zhou, Jun Zhang
Summary: Phonon-assisted upconversion photoluminescence (UCPL) plays a crucial role in various fields. In this study, Rb2CuCl3 single crystals (SCs) were synthesized, which showed high PLQY and efficient phonon-assisted UCPL at room temperature. Optical thermometry sensitivity of the SCs was measured to be up to 6 mK at 295 K. The study also suggests the possibility of net cooling by improving the PLQY with 345 nm excitation. These findings open up a new path to explore laser cooling in STE systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Condensed Matter
S. Mohsen
Summary: A series of Pb1-xNbxSe quantum dots were prepared using a 4,4-bis(carbazole-9-yl)biphenyl assisted microwave approach, showing structural phases and crystalline dimensions highlighted by XRD. The doping of Nb atoms into PbSe quantum dots increased luminescence intensity, reduced spectral bandwidth, and improved quantum yield, making them suitable for highly luminescent NIR-QLED device manufacture.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Alina A. Sonina, Anatoly D. Kuimov, Nikita A. Shumilov, Igor P. Koskin, Tatyana Yu. Kardash, Maxim S. Kazantsev
Summary: The study investigated the crystallization of perylene with different additives and found that the addition of specific additives can control the polymorphic outcome and crystallization conditions of perylene. A co-crystal structure and optoelectronic properties evaluation were conducted, revealing the potential for crystallization control and engineering of high-performance materials in organic optoelectronics.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Optics
Jintao Xu, Qian Jia, Haibo Qiu, Antonio Munoz Mateo
Summary: In this study, we demonstrate the chiral properties of Bose-Einstein condensates in optical lattices by observing nonlinear Bloch states and localized states. The stability of these states is checked through excitations and time evolution, and the phenomenon of Bloch oscillations is explored.
Article
Optics
Liping Li, Bo Wang, Weibin Li
Summary: We investigate the Floquet dynamics of a particle in a three-well system driven by a two-frequency field. We identify integer and fractional photon resonances due to the dual-frequency driving. Pairs of photon-assisted tunneling near the resonance are found to originate from avoided level crossings in the Floquet spectra, which are quantum features of hybridization between different quantum states. This study establishes a close connection between fractional-order resonances and the properties of Floquet modes under two-frequency driving conditions, and illustrates their dependence on driving parameters. These results provide a possibility for coherent control of quantum states using classical external driving fields.
Article
Chemistry, Multidisciplinary
Jinlong Du, Jin-hui Chen, Yuehui Li, Ruochen Shi, Mei Wu, Yun-Feng Xiao, Peng Gao
Summary: By using scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS), this work successfully excites and detects the longitudinal Fabry-Perot resonating modes and the transverse whispering-gallery modes (WGMs) simultaneously in individual SiC nanowires, spanning from near-infrared to ultraviolet spectral regime with wide energy and momentum match. The findings also reveal the size effects on the resonant spectra of nanowires. This work provides an alternative technique for studying light-matter interactions in dielectric nanostructures and has potential applications in modulating free electrons via photonic structures.
Article
Physics, Multidisciplinary
S. Flannigan, L. Madail, R. G. Dias, A. J. Daley
Summary: This research investigates the properties of cold atoms in an optical Lieb lattice and explores how experiments can observe the robustness of edge states and achieve strongly correlated many-body phases. The study further extends these findings to a half-filled 1D Lieb ladder and examines the impact of interactions on correlations.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
S. Flannigan, F. Damanet, A. J. Daley
Summary: In this Letter, the authors propose a method that combines nonMarkovian quantum state diffusion techniques with tensor network methods to capture the non-Markovian dynamics of open quantum systems. By applying this method to a Hubbard-Holstein model, they are able to quantitatively assess the impact of non-Markovian dissipation on correlation spreading and find that these effects can enhance correlation growth, providing new routes for dissipatively enhancing transport and correlation spreading in both solid state and cold atom experiments.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Tomohiro Hashizume, Sridevi Kuriyattil, Andrew J. Daley, Gregory Bentsen
Summary: In this study, we investigated the emergence of different effective geometries in stochastic Clifford circuits with sparse coupling. By changing the probability distribution for choosing two-site gates as a function of distance, we generated sparse interactions that either decay or grow with distance as a function of a single tunable parameter. Tuning this parameter revealed three distinct regimes of geometry for the spreading of correlations and growth of entanglement in the system.
Article
Multidisciplinary Sciences
Andrew J. Daley, Immanuel Bloch, Christian Kokail, Stuart Flannigan, Natalie Pearson, Matthias Troyer, Peter Zoller
Summary: Quantum computing has gained an advantage over classical computers, paving the way for solving practical problems that cannot be tackled by traditional supercomputers. Quantum simulation, especially in relation to materials science, high-energy physics, and quantum chemistry, shows significant potential for real-world applications.
Article
Physics, Multidisciplinary
John Clai Owens, Margaret G. Panetta, Brendan Saxberg, Gabrielle Roberts, Srivatsan Chakram, Ruichao Ma, Andrei Vrajitoarea, Jonathan Simon, David Schuster
Summary: This study explores the cavity quantum electrodynamics of a transmon qubit in a topologically nontrivial Harper-Hofstadter lattice. By breaking time-reversal symmetry, the study achieves spectral resolution of the individual bulk and edge modes of the lattice, observes oscillations between the excited transmon and each mode, and measures the synthetic-vacuum-induced Lamb shift of the transmon. Furthermore, the study demonstrates the ability to count individual photons within each mode of the topological band structure using the transmon.
Article
Physics, Multidisciplinary
Shovan Dutta, Anton Buyskikh, Andrew J. Daley, Erich J. Mueller
Summary: We introduce a framework for applying matrix product state techniques to continuous quantum systems, which allows for accurate calculations of ground-state wave functions, spatial correlations, and spatial entanglement entropy in the continuum. Our approach combines spatial segmentation and continuous basis functions with numerical density matrix renormalization group techniques. We demonstrate faster convergence than standard grid-based discretization in a mesoscopic system of strongly interacting bosons and showcase the power of our approach by studying a superfluid-insulator transition in an external potential.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Matt Jaffe, Lukas Palm, Claire Baum, Lavanya Taneja, Aishwarya Kumar, Jonathan Simon
Summary: This work presents a method for suppressing lens reflections within an optical cavity, achieving a million-fold reduction in backscatter. The study explores the impact of polarization, mode envelope, and transverse mode profile on backreflections, and demonstrates effective strategies to minimize reflections in each sector. The findings also reveal the additional suppression of beams carrying orbital angular momentum. The understanding and techniques described in this work have the potential to expand the utility of optical cavities in various fields.
Article
Quantum Science & Technology
S. Flannigan, N. Pearson, G. Low, A. Buyskikh, I Bloch, P. Zoller, M. Troyer, A. Daley
Summary: This study analyzes the quantitative reliability requirements of quantum simulators beyond the capabilities of existing classical computers, identifies regimes of practical quantum advantage already achieved in current simulator experiments, and determines the hardware requirements for future fault-tolerant digital quantum simulation to reach the same level of accuracy.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Quantum Science & Technology
G. Pelegri, A. J. Daley, J. D. Pritchard
Summary: The study proposes a protocol for implementing high-fidelity multiqubit controlled phase gates on neutral atom qubits. The results show that high-fidelity quantum gates can be achieved in a relatively short time period using this protocol. This has potential implications and applications for future developments.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Brendan Saxberg, Andrei Vrajitoarea, Gabrielle Roberts, Margaret G. Panetta, Jonathan Simon, David Schuster
Summary: Guiding many-body systems to desired states is a central challenge of modern quantum science. In this study, low-entropy quantum fluids of light were constructed in a Bose-Hubbard circuit using particle-by-particle assembly and adiabatic preparation. The results show the formation of strongly correlated fluids with entanglement and avoidance interactions.
Article
Engineering, Aerospace
Dieter Jaksch, Peyman Givi, Andrew J. Daley, Thomas Rung
Summary: Quantum computing utilizes the physics of small systems to create computing platforms that can solve problems beyond the capabilities of traditional supercomputers. However, challenges exist in hardware construction, identifying promising applications, and developing corresponding quantum algorithms. The introduction of intermediate-scale noisy quantum computers has propelled the development of novel algorithms applicable in various domains, including aeroscience. Variational quantum algorithms, which can achieve quantum advantage with only a few hundred qubits, offer promise due to their noise tolerance and applicability to optimization problems across natural sciences and industry. This article highlights the potential of variational quantum algorithms in computational fluid dynamics and emphasizes the need for aligning quantum algorithm development with application-specific expertise to achieve real-world impact.
Article
Physics, Multidisciplinary
A. M. Marques, J. Moegerle, G. Pelegri, S. Flannigan, R. G. Dias, A. J. Daley
Summary: Square-root topology characterizes models with topological properties revealed by squaring the Hamiltonian. This concept has been generalized to 2n-root topology, where n squaring operations are applied to the Hamiltonian. In this paper, we analyze the Hofstadter regime of 2n-root models in quasi-1D and 2D, showing the appearance of multiple magnetic flux insensitive flat bands and a kaleidoscope of butterflies in the Hofstadter diagram. The index n represents an additional fractal dimension of the 2n-root model in its Hofstadter diagram. We discuss potential experimental realizations using ultracold atoms.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Quantum Science & Technology
Ieva Cepaite, Anatoli Polkovnikov, Andrew J. Daley, Callum W. Duncan
Summary: This study introduces a new method that combines optimal control and acceleration research to improve the speed of certain processes in quantum technologies. It has wide application in quantum annealing, state preparation, and individual operations, resulting in significant performance improvement.
Article
Quantum Science & Technology
Valentin Link, Kai Mueller, Rosaria G. Lena, Kimmo Luoma, Francois Damanet, Walter T. Strunz, Andrew J. Daley
Summary: This study addresses the challenge of understanding the information obtained from continuous measurement of an output field in non-Markovian open quantum systems. It provides an exact conditioned reduced description of the atomic state through a hierarchy of equations, allowing for improved understanding of information gain and spin squeezing in strong coupling regimes.
Article
Physics, Multidisciplinary
Tomohiro Hashizume, Gregory Bentsen, Andrew J. Daley
Summary: This study investigates measurement-induced phase transitions in fast scramblers. The circuits featuring sparse nonlocal interactions are found to withstand higher rates of local measurement, which is important for the design of noise-resilient quantum circuits and error correcting codes.
PHYSICAL REVIEW RESEARCH
(2022)
