Article
Quantum Science & Technology
Dominik Kiesenhofer, Helene Hainzer, Artem Zhdanov, Philip C. Holz, Matthias Bock, Tuomas Ollikainen, Christian F. Roos
Summary: This paper presents experiments with planar Coulomb crystals of up to 105 40Ca+ ions in a novel monolithic rf trap, laying the groundwork for quantum simulations of two-dimensional spin models with single-particle control. The trapping potential is characterized through analysis of crystal images and comparison with numerical simulations. Stable confinement of large crystals free of structural configuration changes is demonstrated, and it is found that rf heating of the crystal is not an obstacle for future quantum simulation experiments. Finally, the out-of-plane motional modes of planar crystals consisting of up to 105 ions are prepared close to their ground state through electromagnetically induced transparency cooling, an important prerequisite for implementing long-range entangling interactions.
Article
Optics
Shuwei Jin, Jianshun Gao, Karthik Chandrashekara, Christian Goelzhaeuser, Joschka Schoener, Lauriane Chomaz
Summary: We propose a scheme for loading dysprosium atoms into a narrow-line three-dimensional magneto-optical trap (3D MOT) using a two-dimensional MOT on the broad 421-nm line to generate a high-flux slow atoms beam. Efficient loading of the 3D MOT is achieved even without the push beam, and further enhancement is observed by adding push beams at either 421 nm or 626 nm. The best performance is achieved with a red-detuned push beam on the 626-nm line, resulting in an enhancement factor of 3.6.
Article
Physics, Multidisciplinary
Adonai R. da Cruz, Michael E. Flatte
Summary: Theoretical calculations predict the anisotropic dissipationless circulating current induced by a spin defect in a two-dimensional electron gas. The shape and spatial extent of these dissipationless circulating currents depend dramatically on the relative strengths of spin-orbit fields with differing spatial symmetry, offering the potential to use an electric gate to manipulate nanoscale magnetic fields and couple magnetic defects. The spatial structure of the magnetic field produced by this current is calculated and provides a direct way to measure the spin-orbit fields of the host, as well as the defect spin orientation, e.g., through scanning nanoscale magnetometry.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Shanshan Ding, G. A. Dominguez-Castro, Aleksi Julku, Arturo Camacho-Guardian, Georg M. Bruun
Summary: This study investigates mobile impurities immersed in a Bose-Einstein condensate in a two-dimensional lattice to understand the interactions and possible bound states of quasiparticles. The results show the emergence of a new type of quasiparticle and the spatial influence of impurity-boson interactions. By deriving an effective Schrodinger equation, it is demonstrated that the attractive interaction between two polarons in the lattice leads to the formation of bound states, known as bipolarons.
Article
Optics
Yu-Biao Wu, Guang-Can Guo, Zhen Zheng, Xu-Bo Zou
Summary: The proposal introduces a method for synthesizing higher-order topological superfluids that support various Majorana zero modes in ultracold atomic gases. By using a two-dimensional optical superlattice that modulates spin-orbit coupling spatially, different topological phase transitions among trivial superfluids, first-order and second-order topological superfluids are identified with respect to experimentally tunable parameters.
Article
Chemistry, Physical
Jing Li, Peng Song, Jinpei Zhao, Kristina Vaklinova, Xiaoxu Zhao, Zejun Li, Zhizhan Qiu, Zihao Wang, Li Lin, Meng Zhao, Tun Seng Herng, Yuxin Zuo, Win Jonhson, Wei Yu, Xiao Hai, Pin Lyu, Haomin Xu, Huimin Yang, Cheng Chen, Stephen J. Pennycook, Jun Ding, Jinghua Teng, A. H. Castro Neto, Kostya S. Novoselov, Jiong Lu
Summary: A mild electrochemical exfoliation method has been developed to synthesize large-size, high crystallinity two-dimensional superconductor monolayers, enabling the fabrication of twisted van der Waals heterostructures and printed films. This method yields 2DSC monolayers with unconventional Ising pair superconductivity and enhanced upper critical field, with NbSe2 achieving a high yield of large single-crystal monolayers up to 300 μm. The resulting twisted NbSe2 vdWHs exhibit high stability, good interfacial properties, and modulation of critical current by magnetic field interaction.
Article
Chemistry, Multidisciplinary
Yoon Ho Lee, Jee Yung Park, Peiran Niu, Hanjun Yang, Dewei Sun, Libai Huang, Jianguo Mei, Letian Dou
Summary: A facile one-step solution process for synthesizing 2D perovskite crystal arrays through meniscus-guided coating on patterned substrates is proposed. This method is further used for the synthesis of lateral heterostructure nanoplate arrays. Six different 2D perovskite nanoplate arrays, including epitaxial heterostructures, are successfully realized. Optical and crystallographic characterizations show the high optical performance and crystallinity of the nanoplates. Moreover, this method is utilized for preparing high-performance 2D perovskite nanoplate photosensor arrays. This strategy can guide the fundamental investigation of optical properties and the development of high-performance optoelectronics of perovskite materials.
Review
Materials Science, Multidisciplinary
Hui-Li Jiang, Jia Pan, Wei Zhou, Hui-Min Li, Song Liu
Summary: The review summarizes emerging research on 2D materials and arrays, including preparation strategies of different arrays and applications. The properties of 2D materials can be adjusted through patterned nanostructures.
Article
Materials Science, Multidisciplinary
Francois Damanet, Elliott Mansfield, Megan Briggeman, Patrick Irvin, Jeremy Levy, Andrew J. Daley
Summary: Understanding and controlling the transport properties of interacting fermions is crucial in quantum physics; Different forms of spin-orbit coupling can enhance electron pairing in 1D waveguides; Metal-oxide heterostructures are attractive platforms for controlling the collective spin of electron bound states.
Review
Chemistry, Multidisciplinary
Chit Siong Lau, Sarthak Das, Ivan A. Verzhbitskiy, Ding Huang, Yiyu Zhang, Teymour Talha-Dean, Wei Fu, Dasari Venkatakrishnarao, Kuan Eng Johnson Goh
Summary: Despite years of research, the full potential of two-dimensional transition-metal dichalcogenides is still limited by challenges in dielectric materials and integration techniques. This review provides an overview of various synthesis and integration techniques and their applicability for 2D transition metal dichalcogenides. It also reviews the progress, challenges, and future prospects for various applications.
Article
Chemistry, Physical
Tomislav Begusic, Jiri Vanicek
Summary: An exact finite-temperature expression for vibrational dynamics is derived using the concept of thermo-field dynamics, allowing for an intuitive wavepacket-based interpretation. The new method combines this exact approach with the thawed Gaussian approximation to compute finite-temperature two-dimensional spectra efficiently, providing insight into symmetry breaking and deviation from traditional models in the signal.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Nanoscience & Nanotechnology
W. Fu, H. Chen, A. K-Y Jen
Summary: This review discusses the key issues affecting the performance of 2D perovskites, highlighting the challenges and opportunities for 2D perovskite solar cells.
MATERIALS TODAY NANO
(2021)
Review
Chemistry, Physical
Yingchun Niu, Jiapeng Li, Jiajia Gao, Xiangcheng Ouyang, Lulu Cai, Quan Xu
Summary: Two-dimensional quantum dots (2D-QDs) have seen significant development in the past decades, with potential applications in bioimaging, drug delivery, and more. Researchers are focusing on the synthesis and biomedical applications of 2D-QDs, evaluating both challenges and prospects in this field.
Article
Materials Science, Multidisciplinary
Havard H. Haugen, Asle Sudbo
Summary: Motivated by the observation of an intermediate bosonic metallic state in the twodimensional superconductor-insulator transition at T = 0, an extended Bose-Hubbard model reveals the existence of a 2D superfluid phase, an edge metal state, and a phase closely related to a supersolid phase. These results are connected to STM experiments on MoS2 showing brims of finite density of states around the entire edge of 2D MoS2 samples.
Article
Biochemistry & Molecular Biology
Victor R. Mann, Francesca Manea, Nicholas J. Borys, Caroline M. Ajo-Franklin, Bruce E. Cohen
Summary: The controlled patterning of nanoparticles on bioassemblies allows for the synthesis of complex materials for various applications. By using orthogonal bioconjugation reactions, photonic materials were synthesized on crystalline 2D protein sheets, enabling the simultaneous and controlled conjugation of multiple types of nanoparticles. This specific, stable, and efficient conjugation method facilitates the exploration of interactions between pairs of nanoparticles for the engineering of protein-based photonic nanomaterials.
Article
Multidisciplinary Sciences
Frederick Hakelberg, Philip Kiefer, Matthias Wittemer, Tobias Schaetz, Ulrich Warring
SCIENTIFIC REPORTS
(2018)
Article
Physics, Multidisciplinary
Frederick Hakelberg, Philip Kiefer, Matthias Wittemer, Ulrich Warring, Tobias Schaetz
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Matthias Wittemer, Frederick Hakelberg, Philip Kiefer, Jan-Philipp Schroeder, Christian Fey, Ralf Schuetzhold, Ulrich Warring, Tobias Schaetz
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Philip Kiefer, Frederick Hakelberg, Matthias Wittemer, Alejandro Bermudez, Diego Porras, Ulrich Warring, Tobias Schaetz
PHYSICAL REVIEW LETTERS
(2019)
Article
Multidisciplinary Sciences
Matthias Wittemer, Jan-Philipp Schroeder, Frederick Hakelberg, Philip Kiefer, Christian Fey, Ralf Schuetzhold, Ulrich Warring, Tobias Schaetz
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Article
Optics
Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Boeckling, Jan-Philipp Schroeder, Ulrich Warring, Tobias Schaetz
Summary: We have investigated a scalable trapped-ion array architecture that allows quantum control of many particles in multiple dimensions. Our experimental study focuses on automating the loading and shuttling of single Mg+ ions within our platform, which consists of 13 trapping sites arranged in three dimensions. We have achieved a success rate of over 0.99999 when shuttling ions from a loading hub to multiple sites, and demonstrated coherence preservation and coherent manipulation of superposition states of a hyperfine qubit. Our findings suggest promising applications of these techniques in future large-scale quantum architectures.
Article
Quantum Science & Technology
Ulrich Warring, Frederick Hakelberg, Philip Kiefer, Matthias Wittemer, Tobias Schaetz
ADVANCED QUANTUM TECHNOLOGIES
(2020)
Article
Optics
Matthias Wittemer, Govinda Clos, Heinz-Peter Breuer, Ulrich Warring, Tobias Schaetz