Article
Multidisciplinary Sciences
Jun-Ru Li, Kyle Matsuda, Calder Miller, Annette N. Carroll, William G. Tobias, Jacob S. Higgins, Jun Ye
Summary: We demonstrate tunable itinerant spin dynamics using a gas of potassium-rubidium molecules confined to two-dimensional planes, where a spin-1/2 system is encoded into the molecular rotational levels. The dipolar interaction gives rise to a shift of the rotational transition frequency and a collision-limited Ramsey contrast decay that emerges from the coupled spin and motion. Both the Ising and spin-exchange interactions are precisely tuned by varying the strength and orientation of an electric field, as well as the internal molecular state.
Article
Physics, Multidisciplinary
Hengjiao Guo, Yabing Ji, Qing Liu, Tao Yang, Shunyong Hou, Jianping Yin
Summary: This study proposes a new three-dimensional driven electric lattice (3D-DEL) for driving cold polar molecules. By applying suitable modulated voltages to thin metal plates, a three-dimensional potential well array for polar molecules can be generated in the lattice, enabling the driving of molecules. The 3D-DEL provides a platform for investigating the behavior of cold molecules in periodic driven potentials, with potential applications in various fields such as quantum computing science and quantum information processing.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Timur V. Tscherbul, Jun Ye, Ana Maria Rey
Summary: We propose a general protocol for generating robust entangled states of nuclear and/or electron spins of ultracold polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate effective spin-spin interactions enabled by efficient magnetic control over electric dipolar interactions. These interactions can be used to create long-lived cluster and squeezed spin states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Francesca Pietracaprina, Fabien Alet
Summary: The study suggests the presence of a many-body localization transition in a disordered quantum dimer model on the honeycomb lattice, with conclusions drawn through numerical methods. The results indicate the existence of localization transition within the scale of the system.
Article
Physics, Applied
Sheng-Qiang Li, Nan-Nan Zhang
Summary: An electrostatic lattice, composed of micro-scale traps, is a powerful tool for manipulating cold polar molecules on a chip. However, nonadiabatic transitions in the existing electrostatic lattice often lead to molecule escape. In this paper, we propose a new electrode structure to avoid the zero-field zone at the trap center, effectively preventing nonadiabatic transitions. We numerically calculate the spatial electrostatic field distribution, investigate the effects of voltages on field intensity and trap center height, simulate molecule trajectories using Monte Carlo method, and analyze the factors affecting loading efficiency and positional distribution of trapped molecules.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Mathematics
Ivan Novikov
Summary: This paper investigates the percolation of three related fluids on a honeycomb lattice and provides a detailed exposition of the proof by Izyurov and Magazinov, with minor simplifications, for non-specialists. Additionally, several conjectures based on numerical experiments are stated.
MONATSHEFTE FUR MATHEMATIK
(2022)
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
Multidisciplinary Sciences
Lucile Savary
Summary: The search for truly quantum phases of matter is a key focus in modern condensed matter physics. In this study, a realistic model based on the Haldane chain phase is proposed, which may describe actual materials and provide constraints for experimental realization. The model uses one-dimensional chains with fractional excitations at their ends as building blocks for higher-dimensional exotic fluctuating quantum phases.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Amrita Ghosh, Eytan Grosfeld
Summary: Through the use of QMC technique, it was discovered that hard-core bosons on the honeycomb lattice exhibit a dimer insulator phase near maximum anisotropy, characterized by a topological entanglement entropy ln(2)/2, indicative of a fractional quantum Hall state. The presence of edge states was identified, and a QMC-based method was derived to extract and verify their chirality, all without the need for magnetic flux or lattice frustration.
Article
Physics, Multidisciplinary
Jun-Ru Li, William G. Tobias, Kyle Matsuda, Calder Miller, Giacomo Valtolina, Luigi De Marco, Reuben R. W. Wang, Lucas Lassabliere, Goulven Quemener, John L. Bohn, Jun Ye
Summary: This study demonstrates tunable elastic dipolar interactions among ultracold polar molecules in three dimensions, facilitated by an electric field-induced shielding resonance that suppresses reactive loss. The thermalization rate is controlled by an external electric field, showing the anisotropic dipolar interaction. Evaporative cooling mediated by dipolar interactions in three dimensions is achieved, paving the way for the study of collective quantum many-body physics.
Review
Materials Science, Multidisciplinary
Hong Huang, Toshikaze Kariyado, Xiao Hu
Summary: Topological protection is proposed as a promising method to address the decoherence issue in quantum systems. A scheme is introduced to induce topological excitations in Josephson junction arrays (JJA) by tuning Josephson critical currents on a honeycomb lattice. The system forms hexagonal clusters with different Josephson critical currents, resulting in topologically nontrivial states and topological Josephson plasmon modes at the interface between topological and trivial domains.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Physics, Fluids & Plasmas
Owen Bradley, Jaan Oitmaa, Diptiman Sen, Rajiv R. P. Singh
Summary: This study examines the thermodynamic behavior of modified spin-S Kitaev models, finding distinct properties for half-odd-integer spins and integer spins. Various thermodynamic properties are explored through transfer matrix methods, high-temperature expansions, and Monte Carlo simulations for ferromagnetic and antiferromagnetic models with spin S = 1 and S = 2. The results reveal a range of behaviors, including finite, critical, or exponential correlation lengths as temperature approaches zero, as well as differences in the saturation of Z(2) flux variables among different models.
Article
Chemistry, Multidisciplinary
Qian Gao, Lifu Zhang, Caiyan Zheng, Shulai Lei, Shujuan Li, Zhenpeng Hu
Summary: In this study, a novel quasi-two-dimensional material structure, HSH-C-10, is proposed based on first-principles calculations. The mechanical properties and electronic structure of HSH-C-10 are investigated, revealing unique properties and potential applications.
CHINESE CHEMICAL LETTERS
(2022)
Article
Physics, Multidisciplinary
Yanyan Shangguan, Song Bao, Zhao-Yang Dong, Ning Xi, Yi-Peng Gao, Zhen Ma, Wei Wang, Zhongyuan Qi, Shuai Zhang, Zhentao Huang, Junbo Liao, Xiaoxue Zhao, Bo Zhang, Shufan Cheng, Hao Xu, Dehong Yu, Richard A. Mole, Naoki Murai, Seiko Ohira-Kawamura, Lunhua He, Jiazheng Hao, Qing-Bo Yan, Fengqi Song, Wei Li, Shun-Li Yu, Jian-Xin Li, Jinsheng Wen
Summary: The authors have observed a one-third magnetization plateau in the spin-1 antiferromagnet Na3Ni2BiO6 with a honeycomb lattice, indicating the presence of frustrated interactions. The results suggest that Kitaev interactions can be realized in high-spin magnets.
Article
Materials Science, Multidisciplinary
M. Schmidt, P. F. Godoy
Summary: This study investigates the thermal phase transitions between paramagnetic and antiferromagnetic phases in the J(1)-J(2) frustrated honeycomb Ising model. It reveals that strong frustration effects occur near the PM-AF phase transition when J(2)/J(1) is around 1/4, leading to the disappearance of the Neel temperature and only second-order phase transitions.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Simon Ohler, Maximilian Kiefer-Emmanouilidis, Antoine Browaeys, Hans Peter Buechler, Michael Fleischhauer
Summary: Investigation of properties in a one-dimensional zig-zag ladder system of spin-orbit coupled Rydberg atoms reveals an association between second-order hopping and effective gauge field, leading to the formation of current vortices.
NEW JOURNAL OF PHYSICS
(2022)
Article
Multidisciplinary Sciences
Pagnareach Tin, Michael J. Jenkins, Jie Xing, Nils Caci, Zheng Gai, Rongyin Jin, Stefan Wessel, J. Krzystek, Cheng Li, Luke L. Daemen, Yongqiang Cheng, Zi-Ling Xue
Summary: This study demonstrates that NiBO is a rare two-dimensional metal-organic framework (MOF) Haldane topological material with potential quantum applications.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Felix Roser, Hans Peter Buechler, Nicolai Lang
Summary: The competition between noncommuting projective measurements in discrete quantum circuits can lead to entanglement transitions, separating a regime where stored quantum information survives from a regime where measurements destroy the information. This study focuses on the projective transverse field Ising model and investigates its capabilities as a quantum error correction code.
Article
Materials Science, Multidisciplinary
Jozef Strecka, Katarina Karl'ova, Taras Verkholyaka, Nils Caci, Stefan Wessel, Andreas Honecker
Summary: The thermal phase transitions of a spin-1/2 Ising-Heisenberg model on the diamond-decorated square lattice in a magnetic field are studied using decoration-iteration transformation and classical Monte Carlo simulations. The model is mapped exactly onto an effective classical Ising model on the square lattice with temperature-dependent interactions and magnetic field strength. The existence of discontinuous reentrant phase transitions within a narrow parameter regime is reported and explained in terms of the low-energy excitations from both phases. These exact results are verified by classical Monte Carlo simulations of the effective model.
Article
Optics
Kevin Kleinbeck, Hannes Busche, Nina Stiesdal, Sebastian Hofferberth, Klaus Molmer, Hans Peter Buechler
Summary: Creating nonclassical states of light from simple quantum systems together with classical resources is a challenging problem. We show that chiral emitters under a coherent drive can generate nonclassical photon states. By selecting a specific temporal mode, we derive a coupled master equation for the relevant mode and the chiral emitters. The emitted states are predominantly mixtures of few-photon-added coherent states, which are experimentally accessible and useful for quantum metrology.
Article
Optics
Tobias Ilg, Hans Peter Buechler
Summary: We study the behavior of the excitation spectrum across the quantum phase transition from a superfluid to a supersolid phase of a dipolar Bose gas in one dimension. Using an effective Hamiltonian that includes beyond-mean-field effects, we analyze the system based on Bogoliubov theory with multiple order parameters. Our results show that the supersolid phase exhibits a stable excitation spectrum with Goldstone modes and an amplitude mode in the low-energy regime, and the transition into the supersolid phase is driven by the roton instability in a parameter regime achievable for dysprosium atoms.
Article
Materials Science, Multidisciplinary
Nils Caci, Peter Muhlbacher, Daniel Ueltschi, Stefan Wessel
Summary: We quantitatively characterize weakly first-order thermal phase transitions in three-dimensional spin-one quantum magnets out of planar spin-nematic states using Poisson-Dirichlet distributions (PDs) and large-scale quantum Monte Carlo calculations. The thermal melting of the nematic state is identified to be a weakly first-order transition based on thermal properties and the distribution of the nematic order parameter, contrary to previous claims. Exact results for the order parameter distribution and Binder cumulants at the discontinuous melting transition are obtained through PD calculations. Our findings establish the thermal melting of planar spin-nematic states as a generic platform for quantitative approaches to weakly first-order phase transitions in quantum systems with a continuous SU(2) internal symmetry.
Article
Materials Science, Multidisciplinary
Lukas Weber, Antoine Yves Dimitri Fache, Frederic Mila, Stefan Wessel
Summary: In this study, we examine the ground-state phase diagram and thermal phase transitions of a plaquettized fully frustrated bilayer spin-1/2 Heisenberg model. We find a first-order quantum phase transition line separating two competing quantum-disordered ground states, which have dominant singlet formations on interlayer dimers and plaquettes, respectively. At finite temperatures, this line extends to form a wall of first-order thermal transitions, terminating in a line of thermal critical points. A perturbative approach reveals a quadratic suppression of the critical temperature scale in the strongly plaquettized region. Based on free-energy arguments, we obtain the full phase boundary of the low-temperature dimer-singlet regime, which agrees well with quantum Monte Carlo data.
Article
Materials Science, Multidisciplinary
Alexander Sushchyev, Stefan Wessel
Summary: This study investigates the thermodynamic properties of the extended Hubbard model on a half-filled square lattice in the Slater regime at intermediate coupling using finite-temperature determinantal quantum Monte Carlo simulations. The effects of both nearest-neighbor interactions and long-range Coulomb interactions are considered, and a recently proposed scenario regarding a first-order metal-insulator transition in this interaction regime is assessed.
Article
Materials Science, Multidisciplinary
Lukas Weber, Nils Caci, Stefan Wessel
Summary: In this study, we employ spin trimer-based cluster quantum Monte Carlo simulations to investigate the thermodynamic properties of two-dimensional frustrated quantum antiferromagnets. Our results show that by choosing an appropriate computational basis, we can significantly reduce the sign problem of quantum Monte Carlo and study the thermodynamic behavior of two different lattice models.
Article
Physics, Multidisciplinary
Alice Pagano, Sebastian Weber, Daniel Jaschke, Tilman Pfau, Florian Meinert, Simone Montangero, Hans Peter Buechler
Summary: We study the implementation of a high-fidelity controlled-phase gate in a Rydberg quantum computer. By optimizing the pulse shapes, we are able to reduce the gate infidelity and analyze the influence of fundamental error sources in an experimentally realistic setup. The results show that achieving high gate fidelity is possible.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Quantum Science & Technology
S. Weber, R. Bai, N. Makki, J. Moegerle, T. Lahaye, A. Browaeys, M. Daghofer, N. Lang, H. P. Buechler
Summary: This study presents a new system setup using Rydberg atoms to establish a bosonic fractional Chern insulator, demonstrating the preparation of a topological state with experimentally accessible parameters and confirming the presence of fractional excitations.
Article
Physics, Multidisciplinary
Marcin Kalinowski, Yidan Wang, Przemyslaw Bienias, Michael J. Gullans, D. P. Ornelas-Huerta, Alexander N. Craddock, Steven L. Rolston, J. V. Porto, Hans Peter Buechler, Alexey V. Gorshkov
Summary: Research shows that three-body interactions in Rydberg polaritons may result in stronger forces in dissipative states, an area that still requires further exploration. By applying renormalization group techniques, the shape and strength of dissipative three-body forces can be enhanced, and these interactions can be related to single-mode cavity transmission.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Fluids & Plasmas
Michael F. Herbst, Benjamin Stamm, Stefan Wessel, Matteo Rizzi
Summary: This article presents a methodology for investigating phase diagrams of quantum models using the reduced basis method. The method significantly reduces computational complexity and demonstrates accuracy in two test cases.
Article
Materials Science, Multidisciplinary
Lukas Weber, Stefan Wessel
Summary: This passage discusses the strongly enhanced spin correlations of dangling edge spins in two-dimensional quantum critical antiferromagnets, as well as the differences from classical theory, particularly in the case of the columnar dimer model. The study also reveals stark differences in bond correlations between spin-1/2 and spin-1 cases, and compares the scaling dimensions to recent theoretical predictions. While the predictions partially align with numerical data, they cannot completely explain the findings, further constraining the understanding of dangling edge correlations and surface phenomena in strongly correlated quantum systems.
