Review
Quantum Science & Technology
Shangguo Zhu, Yun Long, Wei Gou, Mingbo Pu, Xiangang Luo
Summary: Arrays of individual atoms trapped in optical microtraps offer a versatile platform for quantum sciences and technologies. By utilizing tunnel-coupled optical microtraps, researchers can explore exotic quantum states, phases, and dynamics that are challenging to achieve in conventional optical lattices.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
Zhen Zheng, Z. D. Wang
Summary: This study proposes a new scheme for simulating the Faraday effect in ultracold atomic gases, using the spin imbalance of atoms to signal an artificial magneto-optic Faraday effect. The feasibility of this scheme and its utilization of existing experimental techniques make it a promising avenue for exploring quantum manipulation in ultracold atomic physics. This approach generalizes the MOFE concept to a new field of study and offers insights into associated intriguing physics.
NEW JOURNAL OF PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Youhua Feng, Xi Zhang, Guoping Zhao, Gang Xiang
Summary: This study demonstrates that the skyrmion Hall effect can be utilized to design a useful skyrmion diode, providing a promising pathway for the development of spintronic devices based on unidirectional skyrmion transport.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Review
Physics, Multidisciplinary
Shengjie Jin, Xuzong Chen, Xiaoji Zhou
Summary: This article reviews the methods for manipulating high orbital ultracold atoms in optical lattices and discusses the construction of atom-orbital qubits and the study of the dynamical evolution of high orbital atoms. These studies are of great significance for the application of ultracold atoms in optical lattices in various fields.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Daniel K. Ruttley, Alexander Guttridge, Stefan Spence, Robert C. Bird, Ruth Le Sueur, Jeremy M. Hutson, Simon L. Cornish
Summary: We successfully form a single RbCs molecule by merging two optical tweezers containing a single Rb atom and a single Cs atom. Both atoms are initially in the ground states of their respective tweezers. By measuring the binding energy, we confirm molecule formation and determine its state. We show that the probability of molecule formation can be controlled by tuning the confinement of the traps during the merging process, in agreement with calculations. We demonstrate that the conversion efficiency from atoms to molecules using this technique is comparable to magnetoassociation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
R. Brearton, L. A. Turnbull, J. A. T. Verezhak, G. Balakrishnan, P. D. Hatton, G. van der Laan, T. Hesjedal
Summary: Magnetic skyrmions are topologically non-trivial magnetic moments that form lattices in helimagnetic materials, showing promise as efficient information carriers. The skyrmion Hall angle, which measures the deviation of skyrmion motion from the driving force, can be determined using reciprocal space techniques. Skyrmions experience deflection under a shear drive, leading to an additional sideways motion known as the skyrmion hall effect.
NATURE COMMUNICATIONS
(2021)
Article
Quantum Science & Technology
Valentin Kasper, Daniel Gonzalez-Cuadra, Apoorva Hegde, Andy Xia, Alexandre Dauphin, Felix Huber, Eberhard Tiemann, Maciej Lewenstein, Fred Jendrzejewski, Philipp Hauke
Summary: In this paper, a platform for universal quantum computation with long-range entangling gates and quantum error correction is proposed, using a mixture of two ultracold atomic species. The system utilizes localized collective spins and phononic excitations to achieve entanglement. The authors also discuss a finite-dimensional version of the Gottesman-Kitaev-Preskill code for protecting quantum information in the system.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
S. N. Nabi
Summary: This study investigates the influence of staggered and three-body interaction potentials on the quantum phases of a spin-1 Bose Hubbard model using mean field approximation (MFA). In the antiferromagnetic case, a smaller staggered potential leads to charge and spin density wave ordering, as well as the emergence of Mott insulator (MI) and staggered superfluid (SSF) phases. The competition between the two potentials stabilizes higher order MI and charge density wave (CDW) phases as the three-body interaction strength increases.
ANNALEN DER PHYSIK
(2023)
Review
Physics, Multidisciplinary
Matthew A. Norcia, Francesca Ferlaino
Summary: The complex electronic structure of lanthanide atoms leads to multiple characteristic properties, such as a large number of optical transitions, anisotropic interaction properties, and a large magnetic moment and spin space in the ground state. These features enable enhanced control over ultracold atoms and their interactions, leading to new forms of control and novel many-body phenomena.
Article
Quantum Science & Technology
Ivana Dimitrova, Stuart Flannigan, Yoo Kyung Lee, Hanzhen Lin, Jesse Amato-Grill, Niklas Jepsen, Ieva Cepaite, Andrew J. Daley, Wolfgang Ketterle
Summary: By manipulating the spin states of ultracold atoms in an optical lattice system, a transition from a fully magnetized state to a correlated zero-magnetization state has been achieved, and the formation of correlations has been demonstrated. These findings highlight the potential and challenges for preparing many-body eigenstates of spin Hamiltonians through adiabatic preparation protocols.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Annabelle Bohrdt, Lukas Homeier, Christian Reinmoser, Eugene Demler, Fabian Grusdt
Summary: In the past decade, quantum simulators, especially cold atoms in optical lattices, have become valuable tools for studying strongly correlated quantum matter. These experiments have achieved significant breakthroughs, such as spin-charge separation and extended-range antiferromagnetism, providing new insights and inspiration for future physics research.
Article
Multidisciplinary Sciences
Boerge Goebel, Ingrid Mertig
Summary: Recent research has shown that the skyrmion Hall effect can be favorable for spintronic applications, allowing the translation of alternating current into directed motion along a specific track, similar to a ratchet mechanism. The motion of skyrmions exhibits fundamental differences compared to topologically trivial magnetic objects and classical particles driven by periodic forces, with the racetrack geometry affecting the strictness of the ratchet mechanism.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
V. Bharti, S. Sugawa, M. Mizoguchi, M. Kunimi, Y. Zhang, S. de Leseleuc, T. Tomita, T. Franz, M. Weidemueller, K. Ohmori
Summary: This study reports the observation and control of ultrafast many-body dynamics of electrons in ultracold Rydberg-excited atoms. The emergence of many-body correlations and the crucial role of quantum fluctuations in the observed dynamics are deduced from time-domain Ramsey interferometry in the picosecond timescale.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Hui Tan, Rui Cao, Yong-Qiang Li
Summary: With the development of atomic cooling technology and optical lattice technology, the quantum system composed of optical lattice and ultracold atomic gas has become a powerful tool for quantum simulation. In this review, the research progress of studying different Bose systems with strong correlations in optical lattice based on the bosonic dynamical mean-field theory is introduced. Various physical phenomena of optical crystal lattice Bose system in weak interaction intervals to strong interaction intervals can be simulated using the calculated phase diagram.
ACTA PHYSICA SINICA
(2023)
Article
Physics, Multidisciplinary
Hong-Juan Meng, Wen-Yuan Wang, Yu-Ren Shi
Summary: Ultracold atoms in a hexagonal lattice with a synthetic magnetic field exhibit a quantum phase transition and parity effects, depending on atomic interaction and magnetic flux.
Article
Physics, Multidisciplinary
A. Bohrdt, Y. Wang, J. Koepsell, M. Kanasz-Nagy, E. Demler, F. Grusdt
Summary: The study reveals strong non-Gaussian correlations in doped quantum antiferromagnets and shows that higher-order correlations dominate over lower-order terms. By analyzing fifth-order spin-charge correlations in the t - J model, the research sheds light on the mobility of dopants and contrasts the results to predictions using models based on doped quantum spin liquids. These predictions can be tested in quantum simulators of the 2D Fermi-Hubbard model, offering insight into the microscopic nature of charge carriers in the Hubbard model relevant to high-T-c superconductivity.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Geoffrey Ji, Muqing Xu, Lev Haldar Kendrick, Christie S. Chiu, Justus C. Brueggenjuergen, Daniel Greif, Annabelle Bohrdt, Fabian Grusdt, Eugene Demler, Martin Lebrat, Markus Greiner
Summary: Understanding the interplay between charge and spin in quantum many-body systems, particularly in the Fermi-Hubbard model, is crucial for explaining emergent properties like high-temperature superconductivity. This study used a cold-atom quantum simulator to observe the formation and spreading dynamics of magnetic polarons, revealing the strong coupling between density and spin in their formation process. It provides insights into out-of-equilibrium emergent phenomena in the Fermi-Hubbard model.
Article
Physics, Multidisciplinary
Annabelle Bohrdt, Lukas Homeier, Immanuel Bloch, Eugene Demler, Fabian Grusdt
Summary: Studies suggest that high-temperature pairing of fermions can be achieved in bilayer models, utilizing the energy gained by one charge when it follows the path created by another charge.
Article
Physics, Multidisciplinary
S. Mistakidis, G. M. Koutentakis, F. Grusdt, P. Schmelcher, H. R. Sadeghpour
Summary: In this study, we investigate the formation and phase diagram of magnetic Bose polaron in a one-dimensional spinor Bose gas. The residue of magnetic polarons decreases significantly with strong impurity-spin interactions. Impurities can be utilized to manipulate spin polarization and suppress spin-spin correlations in the magnetic medium.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Julian F. Wienand, Friederike Horn, Monika Aidelsburger, Julian Bibo, Fabian Grusdt
Summary: This research demonstrates that quantized Thouless pumps connecting C-4-symmetric higher-order topological phases of matter can be described by a tuple of four Chern numbers, which measure quantized bulk charge transport in a direction-dependent manner and allows for the prediction of the sign and value of fractional corner charges. Additionally, the study reveals that the topologically nontrivial phase can be characterized by both quadrupole and dipole configurations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
F. A. Palm, M. Kurttutan, A. Bohrdt, U. Schollwoeck, F. Grusdt
Summary: Strongly interacting fermionic systems can exhibit interesting quantum many-body states with exotic excitations. This study focuses on the interplay between strong interactions and the Pauli exclusion principle in the Hofstadter-Fermi-Hubbard model. The researchers discover a lattice analog of the quantum Hall ferromagnet at magnetic filling factor nu = 1, and observe spin-singlet states with spin-spin correlations similar to skyrmions. They also predict the breakdown of flat-band ferromagnetism at large fields. This work opens up possibilities for experimental studies of lattice QH ferromagnetism and its relation to high-Tc superconductivity.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Henning Schloemer, Annabelle Bohrdt, Lode Pollet, Ulrich Schollwoeck, Fabian Grusdt
Summary: This study uses the density matrix renormalization group method at finite temperature to analyze the formation of stripes in the mixed-dimensional t-J model. It is found that a stable vertical stripe phase can be formed in the absence of pairing, exhibiting incommensurate magnetic order and long-range charge density wave profiles. The proposed model can be seen as a parent Hamiltonian of the stripe phase, and its hidden spin correlations contribute to the predicted resilience against quantum and thermal fluctuations.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Julius Dicke, Lukas Rammelmueller, Fabian Grusdt, Lode Pollet
Summary: We investigate the phase diagram of two different mixed-dimensional t-Jz-J1 models on the square lattice, with hopping amplitude t only nonzero along the x direction. In the first bosonic model, the spin-exchange amplitude J1 is negative and isotropic along the x and y directions, with isotropic and positive Jz. The low-energy physics is characterized by spin-charge separation. In the second model, J1 is restricted to the x axis while Jz remains isotropic and positive. The model exhibits stripe patterns with antiferromagnetic Neel order at low temperature and high hole densities.
Article
Materials Science, Multidisciplinary
Petar Cubela, Annabelle Bohrdt, Markus Greiner, Fabian Grusdt
Summary: It is unclear how effective low-energy degrees of freedom and the corresponding field theories emerge from microscopic models in doped antiferromagnets. This study demonstrates the existence of various long-lived excitations in a doped one-dimensional spin chain in a staggered magnetic field, including magnons, mesonic pairs, and tetraparton bound states. The introduction of a strong-coupling theory allows for the analysis of the polaronic dressing and molecular binding of mesons to collective magnon excitations. The experimental realization of this system can be achieved in quantum gas microscopes.
Article
Materials Science, Multidisciplinary
Haifeng Lang, Philipp Hauke, Johannes Knolle, Fabian Grusdt, Jad C. Halimeh
Summary: Disorder-free localization in translation-invariant gauge theories presents a counterintuitive yet powerful framework of ergodicity breaking in quantum many-body physics. Here, we introduce the concept of Stark gauge protection, which can stabilize or enhance disorder-free localization against gauge-breaking errors in U(1) and Z2 gauge theories up to all accessible evolution times.
Article
Physics, Multidisciplinary
Jad C. Halimeh, Lukas Homeier, Christian Schweizer, Monika Aidelsburger, Philipp Hauke, Fabian Grusdt
Summary: This article discusses the implementation of gauge invariance in lattice gauge theories in quantum synthetic matter. By using simplified local pseudogenerators, the authors successfully stabilize gauge invariance and reduce experimental overhead and complexity, enabling faithful simulations of exact gauge theories on polynomial and exponential time scales.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Anant Kale, Jakob Hendrik Huhn, Muqing Xu, Lev Haldar Kendrick, Martin Lebrat, Christie Chiu, Geoffrey Ji, Fabian Grusdt, Annabelle Bohrdt, Markus Greiner
Summary: In strongly interacting systems with a separation of energy scales, low-energy effective Hamiltonians provide insights into the physics at low temperatures. Virtual excitations mediate the interactions in the effective model, making it advantageous to consider the effective model for interpreting experimental results. By performing measurements in a rotated basis, quantum simulators allow more direct access to the effective model. A proposed protocol involving a linear ramp of the optical lattice depth enables the preparation of approximate t-J-3s model states by eliminating virtual excitations.
Article
Materials Science, Multidisciplinary
Lauritz Hahn, Annabelle Bohrdt, Fabian Grusdt
Summary: The expansion dynamics of an initially localized hole inside a two-dimensional Ising antiferromagnet were studied using classical Monte Carlo and truncated-basis methods. Two dynamically distinct regimes were revealed: a confined region characterized by slow spreading below a critical temperature, and a deconfined region characterized by unbounded diffusive expansion above the critical temperature. The weak effective coupling between spin and charge degrees of freedom was observed, indicating a lack of thermalization between the mobile hole and the Ising spin background.
Article
Optics
Maximilian Buser, Ulrich Schollwoeck, Fabian Grusdt
Summary: Quantum simulators are gaining attention for their ability to reveal the behavior of quantum many-body systems that cannot be simulated classically. This study focuses on the behavior of particle currents in quantum lattice models with a conserved number of particles, and investigates the Hall response of interacting bosonic flux ladders. The results show that the full probability distribution of locally resolved particle currents can be obtained from suitable snapshot data, and the Hall polarization and Hall voltage can be accurately computed from experimentally feasible snapshots.
Article
Materials Science, Multidisciplinary
Alexander Schuckert, Annabelle Bohrdt, Eleanor Crane, Fabian Grusdt
Summary: Quantum simulation experiments are exploring inaccessible regimes, proposing to apply time-dependent photoemission spectroscopy with large magnetic field gradients to drive Bloch oscillations of spinons in cold atom quantum simulators. This can visualize states previously invisible in the equilibrium spectrum and reveal collective interactions among spinons. The simulations suggest a possible route towards solving the mystery of Fermi arcs in cuprate materials.
