Article
Optics
B. Danaci, I Yalcinkaya, B. Cakmak, G. Karpat, S. P. Kelly, A. L. Subasi
Summary: Researchers have found that, even in the delocalized regime, entanglement growth and relaxation occur slowly unlike most other models exhibiting a localization transition.
Article
Chemistry, Physical
Eve Cheng, Daniel Cocks, Robert P. McEachran
Summary: The background energy (V-0) of positrons in noble gases was calculated using an ab initio potential and the Wigner-Seitz ansatz. The study proposed four different assumed forms of the potential, aimed at comparing with literature data and finding that agreement can be obtained for light elements but fails for heavy elements. The strong polarizability of heavy elements may require the use of pseudo-potentials in addition to the simple potential averaging assumed in the WS model.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Optics
Philip Caesar Flores, Eric A. Galapon
Summary: This paper studies the relativistic version of the Aharonov-Bohm time-of-arrival operator for spin-0 particles, and provides insights beyond the original results by taking its rigged Hilbert space extension. Time-of-arrival distributions are constructed using eigenfunctions that exhibit unitary arrival, and the expectation value is calculated, showing that particles can arrive earlier or later than expected classically. The constructed time-of-arrival distribution and expectation value are also consistent with special relativity.
Article
Quantum Science & Technology
Thomas D. Galley, Flaminia Giacomini, John H. Selby
Summary: Recently, there has been a proposal to test the interface of quantum theory and gravity using table-top experiments with massive quantum systems. This study addresses the crucial point of whether the quantum nature of the gravitational field can be concluded from the entanglement of two quantum systems solely due to gravitational interaction. The researchers introduce the framework of Generalised Probabilistic Theories (GPTs) to systematically study all theories compatible with the detection of entanglement generated via the gravitational interaction. Their findings prove that the statements "gravity is able to generate entanglement," "gravity mediates the interaction between the systems," and "gravity is classical" are incompatible.
Article
Physics, Multidisciplinary
Thomas Vetterlein
Summary: This paper investigates the symmetry properties of orthogonality spaces and shows that conditions concerning the existence of automorphisms are essential in characterizing the basic model of quantum physics, the countably infinite dimensional complex Hilbert space.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Johannes Feldmeier, Frank Pollmann, Michael Knap
Summary: This study investigates the late time relaxation dynamics of a pure U(1) lattice gauge theory, revealing a rich phenomenology of the system's nonequilibrium properties such as fracton-like mobility constraints and a novel mechanism for nonergodic behavior in the thermodynamic limit. Additionally, the research explores the role of geometry and the emergence of statistically localized integrals of motion with anomalous hydrodynamics, providing insight into transport in other lattice gauge theories.
Article
Mathematics
Alexandru Aleman, Micheal Hartz, John E. Mccarthy, Stefan Richter
Summary: This paper investigates the inner-outer factorization of Hardy space functions and shows that under certain conditions, the factors of this factorization are essentially unique. Several applications of this factorization are also provided.
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
Dmytro Shapoval, Maxym Dudka, Olivier Benichou, Gleb Oshanin
Summary: This study focuses on the equilibrium properties and phase transition characteristics of binary lattice-gases, including exchanges and interactions. For tree-like Bethe and Husimi lattices, the full phase diagram of a ternary mixture of particles and voids was determined.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Mathematical
Massimo Moscolari, Gianluca Panati
Summary: This article generalizes Prodan's construction of radially localized generalized Wannier bases to gapped quantum systems without time-reversal symmetry, including magnetic Schrodinger operators, and proves some basic properties of such bases. The relevance of this notion to topological transport is investigated by considering the explicitly solvable case of the Landau operator.
JOURNAL OF MATHEMATICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Oliver Hart, Rahul Nandkishore
Summary: We discuss the quantum dynamics in the transverse field Ising model in two dimensions and show that the Hilbert space shatters into dynamically disconnected subsectors up to a quantified prethermal timescale. This shattering arises from the interplay of a U(1) conservation law and a one-form Z2 constraint. The number of disconnected subsectors is exponential in system volume, and a subspace with exponential growth within the system volume exhibits exactly localized dynamics.
Article
Physics, Multidisciplinary
Zhaoxuan Zhu, Hepeng Yao, Laurent Sanchez-Palencia
Summary: Quantum simulation of quasicrystals in synthetic bosonic matter has opened up possibilities for exploring these fascinating systems across a wide range of parameters. However, thermal fluctuations and their competition with quantum coherence can have a significant impact on the quantum phases at zero temperature. In this study, we determine the thermodynamic phase diagram of interacting bosons in a two-dimensional, homogeneous quasicrystal potential using quantum Monte Carlo simulations. We carefully consider finite-size effects and systematically distinguish between quantum and thermal phases. Our results reveal the stabilization of a genuine Bose glass phase against the normal fluid in significant parameter ranges. We also discuss the experimental implications and interpret our findings for strong interactions using a fermionization picture.
PHYSICAL REVIEW LETTERS
(2023)
Article
Statistics & Probability
Giambattista Giacomin, Hubert Lacoin
Summary: This study continues the investigation of the localization transition of a lattice free field in the presence of a quenched disordered substrate. The critical behavior of the free energy and the trajectories of the field near criticality are precisely described in this research.
ANNALS OF PROBABILITY
(2022)
Article
Physics, Applied
Y. L. Tang, Y. L. Zhu, X. L. Ma
Summary: Over the past two decades, theoretical models have envisioned the continuous rotation of electric dipoles inspired by unusual spin textures in magnetic materials. Recent experiments have identified the critical role of external strains and interface depolarization fields in rotating electric dipoles in nano-scale oxide films/superlattices.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Mathematics
Hector Jardon-Sanchez, Niels Jakob Laustsen, Mitchell A. Taylor, Pedro Tradacete, Vladimir G. Troitsky
Summary: This article proves the existence of free objects in certain subcategories of Banach lattices and analyzes specific subcategories, leading to conclusions.
REVISTA DE LA REAL ACADEMIA DE CIENCIAS EXACTAS FISICAS Y NATURALES SERIE A-MATEMATICAS
(2022)
Article
Mathematics, Applied
Jan van Mill, James E. West
Summary: By utilizing a recent characterization result, this paper demonstrates the existence of universal objects for various classes of based-free involutions.
TOPOLOGY AND ITS APPLICATIONS
(2022)
Article
Multidisciplinary Sciences
Matthew A. Norcia, Claudia Politi, Lauritz Klaus, Elena Poli, Maximilian Sohmen, Manfred J. Mark, Russell N. Bisset, Luis Santos, Francesca Ferlaino
Summary: Supersolid states combine properties of solids and superfluids, initially envisioned in solid helium but observed in ultracold atomic gases. The extension of supersolid properties into two dimensions using dysprosium atoms opens up the possibility of studying rich excitation properties.
Article
Physics, Multidisciplinary
Polina Feldmann, Carsten Klempt, Augusto Smerzi, Luis Santos, Manuel Gessner
Summary: Excited-state quantum phase transitions extend the concept of quantum phase transitions beyond the ground state, characterized by closing energy gaps in the spectrum. Identifying order parameters for excited-state quantum phase transitions is a challenge, but introducing a topological order parameter distinguishes excited state phases in experiments with spinor Bose-Einstein condensates, providing a way to experimentally characterize excited-state quantum phases in atomic many-body systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
T. Bland, E. Poli, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, L. Santos, R. N. Bisset
Summary: A robust supersolid state can be formed in a two-dimensional system by directly evaporative cooling into the supersolid phase. The research provides a theoretical basis for the formation process of two-dimensional supersolids and defines a practical path to the formation of large two-dimensional supersolid arrays.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Matthew A. Norcia, Elena Poli, Claudia Politi, Lauritz Klaus, Thomas Bland, Manfred J. Mark, Luis Santos, Russell N. Bisset, Francesca Ferlaino
Summary: Angular oscillations can serve as a useful probe for superfluid properties, but in systems with 2D structure, the frequency of angular oscillations remains nearly unchanged even with significant alterations in superfluidity, suggesting that they may not always provide a robust experimental probe for superfluidity with typical experimental protocols.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
H. Korbmacher, P. Sierant, W. Li, X. Deng, J. Zakrzewski, L. Santos
Summary: Strong intersite interactions in disorder-free lattice systems can lead to a lack of ergodicity. Ultracold dipolar gases in optical lattices offer an experimental platform to study this physics. The decay of dipolar intersite interactions is usually assumed to follow a fixed power law. However, we demonstrate that in a one-dimensional polar lattice gas, the actual decay depends on the transversal confinement, significantly affecting particle dynamics. Our results suggest that disorder-free localization and the role of interaction decay can be flexibly studied in experiments with polar gases.
Article
Optics
D. Scheiermann, L. A. Pena Ardila, T. Bland, R. N. Bisset, L. Santos
Summary: Breakthrough experiments have recently explored the fascinating physics of dipolar quantum droplets and supersolids. The realization of dipolar mixtures has opened up further intriguing possibilities. It has been shown that the presence of a second component under certain conditions catalyzes droplet nucleation and supersolidity in an unmodulated condensate. This catalyzation mechanism can lead to the formation of a two-fluid supersolid with different superfluid fractions for each component, providing interesting prospects for studying spin physics in dipolar supersolids.
Article
Optics
Albert Gallemi, Luis Santos
Summary: Recent experiments have created supersolids, including two-dimensional arrays of quantum droplets. Other density patterns, such as honeycomb supersolids, may occur in trapped condensates at higher densities. While honeycomb supersolids have a higher superfluid fraction compared to droplet supersolids, they cannot create quantized vortices.
Article
Optics
T. Bland, E. Poli, L. A. Pena Ardila, L. Santos, F. Ferlaino, R. N. Bisset
Summary: This article investigates the nature of supersolidity in two-component dipolar condensates and predicts the existence of a binary supersolid state. It also highlights the ability of a dipolar component to induce supersolidity in a nondipolar component.
Article
Physics, Multidisciplinary
Daniel Edler, Luis A. Pena Ardila, Cesar R. Cabrera, Luis Santos
Summary: Buoyancy is a well-known phenomenon in Bose-Einstein condensates, and quantum fluctuations can significantly alter the size and position of immiscible bubbles. In the case of a bubble condensate formed by miscible components, quantum fluctuations modify the equilibrium pressure that determines the bubble volume and change the criterion for buoyancy.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
L. Timm, L. A. Rueffert, H. Weimer, L. Santos, T. E. Mehlstaubler
Summary: Trapped ion systems provide a well-controlled environment for studying and emulating nanofriction, particularly Frenkel-Kontorova-like models. By creating a topological defect in a zigzag ion Coulomb crystal, researchers observed an Aubry transition from free sliding to pinned phase, with quantum effects becoming relevant near the critical point. A simplified model treated the defect as a quantum particle with Peierls-Nabarro potential, revealing the importance of quantum tunneling in kink dynamics at low temperatures. Requirements for observing quantum effects at the Aubry transition in future trapped ion experiments were discussed.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
E. Poli, T. Bland, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, R. N. Bisset, L. Santos
Summary: In this study, we investigate theoretically the supersolidity in three-dimensional dipolar Bose-Einstein condensates, focusing on the impact of trap geometry on the dimensionality of resulting droplet arrays. We found that supersolidity is well established in one-dimensional arrays and may also be favorable in two-dimensional arrays with proper scaling of atom number to trap volume. By developing a tractable variational model, we were able to study droplet crystals and their excitations, and suggest potential creation of exotic ring and stripe states with experimentally feasible parameters. This work sets the stage for future research on two-dimensional dipolar supersolids in realistic settings.
Article
Physics, Multidisciplinary
Amit Jamadagni, Silke Ospelkaus, Luis Santos, Hendrik Weimer
Summary: This study presents a toolbox for controlled manipulation of ultracold polar molecules, utilizing fast chemical reactions between molecules and atoms for atom-molecule entanglement and dissipative dynamics engineering. Experimental parameters for achieving high fidelities can be determined through numerical optimization. The study exemplifies the approach with NaK molecules and Na atoms, addressing residual imperfections like finite strength of the quantum Zeno blockade.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Suman Mondal, Sebastian Greschner, Luis Santos, Tapan Mishra
Summary: The interplay between interparticle interactions and topological features may lead to unusual phenomena, as demonstrated in a one-dimensional two-component Hubbard model. Topological properties of one component can be induced in a trivial component due to intercomponent interactions, with the threshold for full inheritance occurring at weak interactions. This inheritance is illustrated through discussions on bulk and edge properties, as well as dynamical observables like mean chiral displacement and charge pumping.
Article
Optics
Wei-Han Li, Arya Dhar, Xiaolong Deng, Luis Santos
Summary: In models with sufficiently strong intersite interactions, clusters formed at neighboring sites exhibit distinct and rich dynamics on two-dimensional lattices compared to repulsively bound clusters in gases without intersite interactions. This results in a peculiar dynamics characterized by multiple timescales, especially in specific lattice structures like triangular, diamond, and square lattices for different types of bosons, where dimers can move resonantly in different lattice geometries.
