Article
Chemistry, Multidisciplinary
Valentin Yu Mylnikov, Sergey O. Potashin, Grigorii S. Sokolovskii, Nikita S. Averkiev
Summary: In this paper, dissipative phase transition (DPT) near critical point in a system with two-photon driving and nonlinear dissipations is studied. By incorporating quantum fluctuations into the mean-field theory, new effects in the system's steady-state are observed. The presence of quantum fluctuations leads to power-law dependence of the anomalous average at the phase transition point, and also affects the critical point renormalization and the existence of a two-photon pump threshold.
Article
Multidisciplinary Sciences
Su Kong Chong, Lizhe Liu, Kenji Watanabe, Takashi Taniguchi, Taylor D. Sparks, Feng Liu, Vikram V. Deshpande
Summary: Transport evidence of two-dimensional (2D) topological states in a bulk insulating three-dimensional (3D) topological insulator (TI) is provided. The existence of a finite longitudinal conductance at the surface gap suggests the emergence of a quantum spin Hall (QSH) state. The transition from QSH to quantum Hall (QH) state in a transverse magnetic field further supports the existence of this unique 2D topological phase. Another method of achieving the 2D topological state is demonstrated through surface gap-closing and topological phase transition mediated by a transverse electric field.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Victor Helson, Timo Zwettler, Farokh Mivehvar, Elvia Colella, Kevin Roux, Hideki Konishi, Helmut Ritsch, Jean-Philippe Brantut
Summary: A density wave (DW) is a type of long-range order in quantum matter that is associated with self-organization into a crystalline structure. The interplay of DW order with superfluidity presents a significant theoretical challenge. In this study, a tunable quantum Fermi gas with both strong, contact interactions and photon-mediated, spatially structured long-range interactions in an optical cavity is realized. The DW order is stabilized in the system above a critical long-range interaction strength, which is identified through superradiant light-scattering properties. The experimental setup provides a fully tunable and microscopically controllable platform for studying the interplay of superfluidity and DW order.
Article
Physics, Multidisciplinary
Juan Roman-Roche, Fernando Luis, David Zueco
Summary: A system of magnetic molecules coupled to microwave cavities undergoes the equilibrium superradiant phase transition, which is experimentally observable. The coupling effect is illustrated by the vacuum-induced ferromagnetic order in a quantum Ising model and the modification of the magnetic phase diagram of Fe-8 dipolar crystals, showcasing the cooperation between intrinsic and photon-induced spin-spin interactions. Finally, a transmission experiment demonstrates the quantum electrodynamical control of magnetism in resolving the transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Chayan Purkait, Asoka Biswas
Summary: We study the performance of quantum Stirling machines based on two Heisenberg-coupled spins as the working system near the quantum critical point (QCP). The efficiency of the engine and the coefficient of performance of the refrigerator are enhanced at the QCP due to the nonanalytic behavior of spin-spin correlation and entanglement.
Review
Physics, Multidisciplinary
Chudan Qiu, Xinfang Nie, Dawei Lu
Summary: Thanks to advanced quantum coherent control techniques, the nuclear magnetic resonance (NMR) system has become a unique platform for quantum simulation of many-body physics and high-energy physics. Recent experimental progress and future prospects on quantum simulation realized on NMR systems are discussed.
Article
Physics, Multidisciplinary
M. G. Vasin, V. M. Vinokur
Summary: The study reveals that the fluctuation spectrum changes near the quantum critical point may lead to a continuous change in critical exponents with temperature, reflecting a transition from thermal fluctuations to quantum fluctuations regime. By employing the Keldysh-Schwinger approach, an exemplary system obeying the Bose-Einstein is investigated to develop a renormalization group technique for obtaining analytical expressions for temperature dependencies of critical exponents.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Physics, Particles & Fields
Nikos Irges, Fotis Koutroulis
Summary: The study focuses on constructing the zero temperature effective action for an SU(2) Yang-Mills theory in five dimensions, incorporating higher dimensional operators to be sensitive to the Higgs phase. Non-perturbative information related to a first order quantum phase transition is included in the effective action, resulting in a low finite cut-off and mild fine tuning of the scalar mass.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Felipe Barra, Karen Hovhannisyan, Alberto Imparato
Summary: This paper introduces and studies a cyclic battery-charger quantum device that is in thermal equilibrium or in a ground state during the charge storing stage. The study shows that the extracted energy and thermodynamic efficiency can be enhanced by operating the cycle close to the quantum phase transition point. The performance of the device is further optimized by leveraging the correlations between the battery and the charger.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Elahe Samimi, Mohammad Hossein Zarei, Afshin Montakhab
Summary: In this paper, the concept of multipartite entanglement is used to study topological quantum phase transitions. The results show that there is a continuous and sharp transition of global entanglement from a maximum value in the topological phase to zero in the magnetized phase. The introduction of conditional global entanglement provides a good measure of multipartite entanglement in TQPTs.
Article
Materials Science, Multidisciplinary
Vanuildo S. de Carvalho, Hermann Freire
Summary: We study the pairing instability in a two-dimensional metallic system induced by Ising-nematic quantum fluctuations, considering the relevant coupling between the nematic order parameter and the elastic modes (acoustic phonons) of the lattice. We find that this nematoelastic coupling leads to a decrease in both the superconducting critical temperature and the gap function, regardless of the gap symmetry. Moreover, we show that this coupling allows us to investigate the emergence of the superconducting phase from either a non-Fermi liquid or a Fermi liquid normal state at low temperatures, with different critical exponents characterizing the phase transitions.
Article
Materials Science, Multidisciplinary
Ceren B. Dag, Kai Sun
Summary: This paper investigates the dynamical detection of quantum phases and phase transitions in quenched systems, revealing significant differences in scaling law exponent near the dynamical crossover between short and long times. It also shows that when integrability is strongly broken, the crossover boundary transforms into a region separating two other dynamical regions acting as dynamically ordered and disordered regimes.
Article
Physics, Multidisciplinary
Joseph O. Indekeu, Kenichiro Koga
Summary: The dihedral contact angles between interfaces in three-fluid-phase equilibria must be continuous functions of the bulk thermodynamic fields. A nonwetting gap in the phase diagram is predicted by this argument, challenging the common belief in critical-point wetting. Experimental results support this argument, showing that complete wetting is only found in a small vicinity of the tricritical point, while nonwetting prevails outside this region.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Daniel A. Paz, Mohammad F. Maghrebi
Summary: Driven-dissipative many-body systems are difficult to analyze due to their nonequilibrium dynamics, dissipation, and many-body interactions. In this paper, we developed an exact field-theoretical analysis and a diagrammatic representation of a driven-dissipative infinite-range Ising model, showing critical behavior, finite-size scaling, and the effective temperature near phase transitions. The study revealed distinct critical behaviors at phase transitions, with overdamped and underdamped dynamics depending on the dissipative critical points.
Article
Mechanics
Nitesh Jaiswal, Mamta Gautam, Tapobrata Sarkar
Summary: In this study, the relationship between Nielsen complexity, Loschmidt echo, and Fubini-Study complexity in the transverse XY model after a sudden quantum quench was investigated. It was found that NC and LE are related at small times and show enhanced temporal oscillations in the thermodynamic limit, especially when quenching from a close neighborhood of the critical line.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2022)
Article
Physics, Multidisciplinary
Meng-Na Tang, Yong-Hui Lin, Feng-Kun Guo, Christoph Hanhart, Ulf-G. Meissner
Summary: The internal structure of charm-strange mesons D-s0*(2317) and D-s1(2460) is being extensively studied. Their narrow widths are due to their dominant decay through isospin-breaking hadronic channels. The decay of D-s1(2460) can also occur through hadronic final states with isospin conservation, but is strongly suppressed due to phase space limitations. By considering the Ds1(2460) as a D*K hadronic molecule, we find that the predicted partial widths and the pi(+)pi(-) invariant mass distribution are consistent with experimental measurements, and suggest possible ways to distinguish between the hadronic molecular and compact state pictures for the D-s1(2460)(+). Predictions for B-s1(0) -> B-s(0) pi(+) pi(-) are also made.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Shihang Shen, Serdar Elhatisari, Timo A. Laehde, Dean Lee, Bing-Nan Lu, Ulf-G. Meissner
Summary: The carbon atom is the backbone of organic chemistry and has a complex nucleus in its predominant isotope, C-12. In this study, a model-independent density map of the nuclear states of C-12 is provided using nuclear lattice effective field theory. The well-known Hoyle state is found to have a bent-arm or obtuse triangular arrangement of alpha clusters. All low-lying nuclear states of C-12 are identified as having an intrinsic shape composed of three alpha clusters forming either an equilateral triangle or an obtuse triangle.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Particles & Fields
Daniel Severt, Maxim Mai, Ulf-G. Meissner
Summary: We propose a new finite-volume approach based on an Effective Field Theory Lagrangian to implement two- and three-body dynamics in a transparent way. The formalism utilizes a particle-dimer picture and formulates the quantization conditions based on the self-energy of the decaying particle. The study focuses on the Roper resonance, utilizing input from lattice QCD and phenomenology, and predicts finite-volume energy eigenvalues, which are then compared to existing lattice QCD calculations as initial guidance for precision requirements.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
H. Alharazin, B. -d. Sun, E. Epelbaum, J. Gegelia, U. -g. Meissner
Summary: This article applies the definition of local spatial densities using sharply localized one-particle states to spin-3/2 systems. Matrix elements of the electromagnetic current and the energy-momentum tensor are considered, and integral expressions of associated spatial distributions in terms of form factors are derived.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
J. Yu. Panteleeva, E. Epelbaum, J. Gegelia, U. -G. Meissner
Summary: This paper considers the matrix elements of the electromagnetic current and energy-momentum tensor for spin-1 systems with sharply localized states. It discusses their interpretation as local spatial densities of various characteristics of the system in question.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Caleb Hicks, Dean Lee
Summary: Solving the generalized eigenvalue problem is a useful method for finding energy eigenstates of large quantum systems. However, the process is susceptible to small errors, especially when using stochastic methods with significant error bars. In this work, the trimmed sampling algorithm is introduced to overcome this problem by sampling prior probability distributions determined by uncertainty estimates and physics-informed constraints. The method provides a probability distribution for the eigenvectors and observables with reliable error estimates, outperforming standard regularization methods.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Nuclear
A. M. Gasparyan, E. Epelbaum
Summary: We extend the renormalizability study of chiral effective field theory with a finite cutoff to nucleon-nucleon scattering, considering nonperturbative effects. The nucleon-nucleon interaction is expanded up to next-to-leading order, with the leading-order interaction treated nonperturbatively. New features related to the renormalization of the effective field theory are revealed, including more stringent constraints on the leading-order potential to ensure renormalizability and correct power counting for the next-to-leading-order amplitude. Numerical analysis of several partial waves in nucleon-nucleon scattering, 3P0, 3S1-3D1, and 1S0, is conducted to illustrate the theoretical findings, discussing cutoff dependence and convergence of the chiral expansion for these channels.
Article
Physics, Nuclear
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meissner
Summary: Using dispersion theory, the Sigma-to-Lambda transition form factors in electromagnetic interactions are calculated considering the pion electromagnetic form factor, SU(3) chiral perturbation theory, the baryon decuplet, and the pi pi- K coupled-channel effect. The electric form factor is significantly affected by the inclusion of the K channel, while the magnetic form factor is minimally affected. The uncertainties in the three-flavor chiral perturbation theory are estimated using a bootstrap sampling method.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Astronomy & Astrophysics
V. Baru, E. Epelbaum, A. A. Filin, C. Hanhart, A. V. Nefediev
Summary: Heavy-quark spin symmetry applies to the direct decay of heavy quarkonia, but can be overcome in the presence of multiquark intermediate states. The violation of HQSS can be balanced by the narrowness of the intermediate states, resulting in equal transition strengths into final states with different total heavy quark spins. Spin symmetry is restored when the mass of a heavy quark becomes infinite.
Article
Physics, Particles & Fields
Chao-Wei Shen, Yong-hui Lin, Ulf-G. Meissner
Summary: Using an effective Lagrangian with heavy quark spin symmetry, this study investigates the coupled-channel dynamics of the doubly charmed systems D-(*) Sigma((*))(c). The potential considered includes exchanges of pseudoscalar and vector mesons in the t-channel. By applying the first iterated solution of the N/ D method, several S-wave bound states with isospin I = 1/2 are discovered. These states correspond to open-charm partners of the hidden charm pentaquarks P-psi(N) observed by the LHCb Collaboration.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
J. Yu. Panteleeva, E. Epelbaum, J. Gegelia, U-G Meissner
Summary: Using spherically symmetric sharply localized wave packets, we determine the details of defining the spatial densities corresponding to the gravitational form factors of spin-0 and spin-1/2 systems. The expressions for the spatial densities are provided in the frames with both zero and non-zero expectation values of the momentum operator.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Nuclear
P. Yin, X. L. Shang, J. N. Hu, J. Y. Fu, E. Epelbaum, W. Zuo
Summary: We investigate the pairing properties of state-of-the-art semilocal coordinate-space and semilocal momentum-space regularized chiral interactions. We find weak regulator dependence and robust convergence in the 3SD1 and 1S0 pairing gaps, while chaotic behavior is observed for the 3PF2 results. In addition, discrepancies between the chiral interactions and the Av18 potential in the 3SD1 and 3PF2 channels suggest the need for further constraints on the nucleon-nucleon interactions in these channels at high energies. Furthermore, the different tensor force effects of the chiral interactions and the Av18 potential for the 3SD1 and 3PF2 pairing gaps indicate distinct tensor components in these interactions.