Article
Physics, Multidisciplinary
Cecile Carcy, Gaetan Herce, Antoine Tenart, Tommaso Roscilde, David Clement
Summary: This study provides a joint experimental and theoretical analysis on the adiabatic preparation of ultracold bosons in optical lattices to simulate the three-dimensional Bose-Hubbard model. The measured temperatures are in agreement with theoretical calculations, demonstrating that equilibrium states of the model can be adiabatically prepared in cold-atom apparatus. The Fisher information associated with the thermometry method is most accurate in the critical regime close to the Mott transition, as confirmed in the experiment.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jan Behrends, Benjamin Beri
Summary: This paper presents the construction of fermionic all-to-all Floquet quantum circuits to simulate the dynamics of the SYK model. These circuits can be built using local ingredients in Majorana devices, allowing for the reconciliation of all-to-all interactions with the topological protection of Majorana zero modes, which is lacking in existing analog SYK simulation proposals. The paper also describes how dynamical correlation functions, including out-of-time-ordered ones, can be measured in such analog-digital implementations using the anticipated capabilities of Majorana devices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Marcell Gall, Nicola Wurz, Jens Samland, Chun Fai Chan, Michael Koehl
Summary: Researchers have used high-resolution microscopy to explore quantum phases in two-dimensional fermionic systems in optical lattices. By implementing a bilayer Fermi-Hubbard model, they found that interlayer coupling controls the crossover between different electronic states, potentially advancing future studies on superconducting properties of Hubbard models.
Article
Physics, Multidisciplinary
Philip D. Gregory, Jacob A. Blackmore, Sarah L. Bromley, Jeremy M. Hutson, Simon L. Cornish
Summary: Quantum states with long-lived coherence are crucial for quantum computation, simulation, and metrology. By characterizing and eliminating the dominant mechanisms of decoherence in ultracold molecular qubits, we achieved coherence times exceeding 5.6 seconds.
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
Materials Science, Multidisciplinary
Daniel Shaffer, Luiz H. Santos
Summary: Pairs-density waves (PDWs) are superconducting states that break translation symmetry in systems with time-reversal symmetry. Recent experiments and cuprates' pseudogap regime have provided evidence for PDWs. In this work, we propose a symmetry-based mechanism where PDWs emerge as a weak-coupling instability in a two-dimensional metal with time-reversal symmetry. By combining mean-field and renormalization-group analyses, we identify a weak-coupling instability towards a triplet PDW in the & pi;-flux square lattice model. This PDW is protected by magnetic translation symmetries characteristic of Hofstadter systems.
Article
Chemistry, Physical
Kasra Asnaashari, Roman V. Krems, Timur V. Tscherbul
Summary: Due to their rich internal structure and significant long-range interactions, ultracold molecules have been extensively studied as carriers of quantum information. We propose a classification scheme for molecular qubit encodings based on the type of effective interaction between the qubits. By considering the encoding of an effective spin-1/2 system into nonadjacent rotational states of polar and nonpolar molecules, we demonstrate the applicability of our classification scheme. This scheme provides valuable information for optimal molecular qubit encoding choices in quantum information storage and processing, as well as for generating many-body entangled states and quantum annealing.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Multidisciplinary Sciences
Stasja Stanisic, Jan Lukas Bosse, Filippo Maria Gambetta, Raul A. Santos, Wojciech Mruczkiewicz, Thomas E. O'Brien, Eric Ostby, Ashley Montanaro
Summary: The authors successfully reproduced qualitative properties of the Fermi-Hubbard model using a VQE-based algorithm on a superconducting quantum processor, and employed various error-mitigation techniques to demonstrate the effectiveness of the algorithm.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Satoshi Okamoto, Narayan Mohanta, Elbio Dagotto, D. N. Sheng
Summary: This study theoretically demonstrates the interplay between nontrivial band topology and electronic interaction in a multiorbital system on a kagome lattice. Specifically, it is shown that the multiorbital kagome model with atomic spin-orbit coupling naturally supports topological bands characterized by nonzero Chern numbers, and can induce a fractional Chern insulating state when a flat band is 1/3 filled. Possible realization of these findings in real kagome materials is also discussed.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Xiaoxia Li, Qili Li, Tongzhou Ji, Ruige Yan, Wenlin Fan, Bingfeng Miao, Liang Sun, Gong Chen, Weiyi Zhang, Haifeng Ding
Summary: In this study, Lieb lattices were constructed using scanning tunneling microscopy and the electronic properties were probed by observing the electron wavefunction overlap between iron atoms. The observed long-range overlap is attributed to the surface state.
CHINESE PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Tsuneya Yoshida
Summary: In this study, a correlated system in equilibrium with non-Hermitian topology inducing a skin effect was analyzed. The pseudospectrum under different boundary conditions and the impact of line-gap topology were discussed. Numerical simulations revealed that damping of quasiparticles destroys nontrivial line-gap topology while inducing nontrivial point-gap topology, which are reflected in the temperature dependence of local pseudospectral weight.
Article
Optics
Michal Suchorowski, Anna Dawid, Michal Tomza
Summary: The study investigates the properties of two interacting ultracold highly magnetic atoms trapped in a one-dimensional harmonic potential, focusing on the interplay of external magnetic field, spin-spin interaction, and trapping potential on the system's magnetization. By examining the time evolution of observables that could be experimentally observed, the role of indistinguishability and symmetries in the dynamics is demonstrated. The model presented sheds light on the on-site interaction of extended Hubbard models, providing a better understanding of many-body quantum simulators.
Article
Multidisciplinary Sciences
S. K. Kanungo, J. D. Whalen, Y. Lu, M. Yuan, S. Dasgupta, F. B. Dunning, K. R. A. Hazzard, T. C. Killian
Summary: This study demonstrates the creation of a synthetic dimension using Rydberg atoms, which supports topological edge states. By engineering the tunneling amplitudes and on-site potentials, the authors successfully realize the one-dimensional Su-Schrieffer-Heeger Hamiltonian, a paradigmatic model of topological matter. The probed band structure reveals symmetry-protected topological edge states at zero energy.
NATURE COMMUNICATIONS
(2022)
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
J. Knapp, L. Levitin, J. Nyeki, A. F. Ho, B. Cowan, J. Saunders, M. Brando, C. Geibel, K. Kliemt, C. Krellner
Summary: The nature of the antiferromagnetic order, quantum criticality, and superconductivity in YbRh2Si2 remain unknown. We measured the heat capacity over a wide temperature range using current sensing noise thermometry and observed a sharp anomaly at 1.5 mK, which is identified as an electronuclear transition into a state with spatially modulated electronic magnetic order. Magnetic field measurements show the eventual suppression of this order, demonstrating the coexistence of a large moment antiferromagnet with possible superconductivity.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
F. Grusdt, M. Kanasz-Nagy, A. Bohrdt, C. S. Chiu, G. Ji, M. Greiner, D. Greif, E. Demler
Article
Instruments & Instrumentation
A. Mazurenko, S. Blatt, F. Huber, M. F. Parsons, C. S. Chiu, G. Ji, D. Greif, M. Greiner
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Physics, Multidisciplinary
Annabelle Bohrdt, Christie S. Chiu, Geoffrey Jig, Muqing Xu, Daniel Greif, Markus Greiner, Eugene Demler, Fabian Grusdt, Michael Knap
Article
Multidisciplinary Sciences
Christie S. Chiu, Geoffrey Ji, Annabelle Bohrdt, Muqing Xu, Michael Knap, Eugene Demler, Fabian Grusdt, Markus Greiner, Daniel Greif
Article
Physics, Multidisciplinary
Da-Shuai Ma, Yuanfeng Xu, Christie S. Chiu, Nicolas Regnault, Andrew A. Houck, Zhida Song, B. Andrei Bernevig
PHYSICAL REVIEW LETTERS
(2020)
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
Multidisciplinary Sciences
Cole Miles, Annabelle Bohrdt, Ruihan Wu, Christie Chiu, Muqing Xu, Geoffrey Ji, Markus Greiner, Kilian Q. Weinberger, Eugene Demler, Eun-Ah Kim
Summary: The study revealed that machine learning models can identify fourth-order spin-charge correlators as distinguishing features, shedding light on the Fermi-Hubbard model.
NATURE COMMUNICATIONS
(2021)
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
Physics, Multidisciplinary
Christie S. Chiu, Annette N. Carroll, Nicolas Regnault, Andrew A. Houck
Summary: This work conducts a high-throughput screening and explores new line-graph materials and lattice models, as well as identifies materials with potential flat topological bands. The results are of great significance for future studies in the field of flat-band many-body physics.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Christie S. Chiu, Da-Shuai Ma, Zhi-Da Song, B. Andrei Bernevig, Andrew A. Houck
PHYSICAL REVIEW RESEARCH
(2020)
