Article
Chemistry, Multidisciplinary
Wei-Ling Jiang, Zhiyong Peng, Bin Huang, Xiao-Li Zhao, Di Sun, Xueliang Shi, Hai-Bo Yang
Summary: This study systematically investigated the spin-spin interactions of exo- and endo-TEMPO radical-functionalized metallacycles and metallacages constructed via coordination-driven self-assembly. The results revealed distinct spin-spin interactions in solution and solid states, with a large zero-field splitting observed in certain crystalline forms. Moreover, reversible on-off switching of the zero-field splitting was successfully achieved via crystal-to-amorphous transformation induced by mechanical grinding and solvent vapor stimuli.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Multidisciplinary
Paul Lauria, Wei-Ting Kuo, Nigel R. Cooper, Julio T. Barreiro
Summary: We have experimentally created a spin-momentum lattice using a trapped Fermi gas. This lattice, formed by cyclically rotated atom-laser couplings between three atomic spin states, creates a triangular lattice in a synthetic spin-momentum space. By demonstrating and studying this lattice's dynamics with spin- and momentum-resolved absorption imaging, new possibilities for synthetic spin systems and engineering topological bands are opened up.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
Michael Berger, Jamal Berakdar
Summary: Quantum states of systems with classical chaotic dynamics can be scarred, and this study demonstrates how the scarred state can be imaged to a region that does not support scarring. This phantom scar has a significant impact on the spin-dependent system dynamics, as shown by explicit calculations for fidelity and correlation functions. Numerical simulations and analysis for the spin-dependent electron dynamics in semiconductor-based double quantum dots provide insights into the coherent phenomenon of scarring and its localization properties in a narrow spectral window.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
Jian Wang, Yi Qiao, Junpeng Cao, Wen-Li Yang
Summary: In this research, an integrable quantum spin chain model with various interactions was constructed. It was found that spins near the boundary are polarized, leading to anisotropic exchange interactions. By using the off-diagonal Bethe ansatz, an exact solution to the system was obtained, and the ground state energy was calculated.
Article
Optics
J. D. Arias Espinoza, M. Mazzanti, K. Fouka, R. X. Schuessler, Z. Wu, P. Corboz, R. Gerritsma, A. Safavi-Naini
Summary: The proposed method uses optical tweezers to engineer the sound-wave spectrum of trapped ion crystals, allowing for tuning of interactions and connectivity beyond current setups. Demonstrated feasibility of generating target spin-spin interaction patterns in both one- and two-dimensional crystals using realistic tweezer settings and experimentally relevant trap parameters. This approach advances quantum simulation in trapped-ion platforms by enabling realization of a broader family of quantum spin Hamiltonians.
Article
Physics, Multidisciplinary
Benjamin Merkel, Pablo Cova Farina, Andreas Reiserer
Summary: Ensembles of dopants have wide applications in quantum technology, but the miniaturization of corresponding devices is hindered by dipolar interactions. Dynamical decoupling can alleviate the decoherence in crystals with strong anisotropic spin-spin interactions, originating from anisotropic g tensor, but cannot fully eliminate it. These findings can be extended to various quantum systems used for quantum sensing, microwave-to-optical conversion, and quantum memory.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Hua-Chen Zhang, Ying-Hai Wu, Hong-Hao Tu, Tao Xiang
Summary: The study proposes resonating valence bond wave functions for a spin-1 system on the torus that realize a non-Abelian chiral spin liquid. The topological order of the system is revealed through the explicit construction of threefold-degenerate ground states and analytical computation of the modular S and T matrices.
Article
Chemistry, Multidisciplinary
Athanassios K. Boudalis, Jorge-Enrique Olivares-Pena, Eufemio Moreno-Pineda, Artem Fediai, Wolfgang Wenzel, Philippe Turek, Mario Ruben
Summary: The FID-detected nutations of the antiferromagnetic crystal [Y(pc)(2)] show that its radical spin can be driven coherently in its magnetically condensed undeuterated phase at room temperature. In liquid-helium measurements, additional Rabi oscillations were observed, attributed to transitions within higher-multiplicity states of finite-sized chain fragments.
CHEMICAL COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Alejandro Ferron, Pablo Serra, Omar Osenda
Summary: The dynamical behavior of quantum state in different quantum spin chains is analyzed when the initial state belongs to the one excitation subspace. The results show that inhomogeneous chains can transfer single excitations with near-perfect fidelity for two different spin chain Hamiltonians.
Article
Physics, Multidisciplinary
Lea -Marina Steinert, Philip Osterholz, Robin Eberhard, Lorenzo Festa, Nikolaus Lorenz, Zaijun Chen, Arno Trautmann, Christian Gross
Summary: Researchers have achieved spatially tunable interactions in analog quantum simulators by manipulating Rydberg atoms, expanding the capabilities of these simulators.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
A. Hijano, E. J. Rodriguez, D. Bercioux, D. Frustaglia
Summary: This work investigates the response of spin carriers to effective field textures in curved one-dimensional interferometric circuits, finding that the interplay between Rashba and Dresselhaus spin-orbit interactions and circuit geometry modifies the geometric characteristics of spinors, resulting in the localization of electronic wave function and suppression of quantum conductance.
COMMUNICATIONS PHYSICS
(2023)
Article
Quantum Science & Technology
Junghyun Lee, Keigo Arai, Huiliang Zhang, Mark J. H. Ku, Ronald L. Walsworth
Summary: This study demonstrates the transitions of a Chern number from 0 to 3 in an electronic-nuclear spin system associated with the nitrogen-vacancy (NV) centre in diamond. The topological transitions between different phases are realized by varying the radius and offset of the control Hamiltonian parameter sphere, showing consistency with numerical calculations.
NPJ QUANTUM INFORMATION
(2023)
Article
Materials Science, Multidisciplinary
Yu-Hsueh Chen, Jozef Genzor, Yong Baek Kim, Ying-Jer Kao
Summary: Using the symmetric tensor network, we studied the excitation spectrum of the spin-1 Kitaev model and confirmed the ground state is in a Z(2) spin-liquid phase. Unlike the spin-1/2 case, the isotropic spin-1 Kitaev model exhibits dispersive bosonic charge excitation. The correlation length for the gapped single-particle charge excitation is approximately 6.7 unit cells.
Article
Mechanics
Mamta Gautam, Nitesh Jaiswal, Ankit Gill, Tapobrata Sarkar
Summary: We study information theoretic quantities in models with three and four spin interactions, which show distinctive characteristics compared to their nearest neighbour counterparts. The Nielsen complexity (NC), Fubini-Study complexity (FSC), and entanglement entropy (EE) are quantified to measure these characteristics. The models have a rich phase structure, different from ones with nearest neighbour interactions, which results in different behavior of information theoretic quantities. For example, the derivative of NC does not diverge but shows a discontinuity near continuous phase transitions, and the FSC may be regular and continuous across such transitions. In addition, the EE exhibits novel discontinuity at first and second order quantum phase transitions.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Chemistry, Multidisciplinary
Kang Zhang, Nianlong Zou, Yanru Ren, Jizheng Wu, Chen Si, Wenhui Duan
Summary: The combination of nontrivial topology and charge density wave (CDW) in materials can lead to novel quantum phenomena. In this study, it is predicted that monolayer NbTe2 in its high-symmetry 1T phase exhibits nontrivial topology that is sensitive to electronic interactions. At low temperature, a CDW order emerges and coexists with the nontrivial topology. The CDW structure shows an insulating nontrivial gap in both the quantum spin Hall (QSH) and quantum anomalous Hall (QAH) phases, indicating an effective means to modulate the topological state.
ADVANCED FUNCTIONAL MATERIALS
(2022)