Article
Optics
Kaustubh S. Agarwal, Yogesh N. Joglekar
Summary: The study obtained the PT threshold for a one-dimensional, finite Kitaev chain and identified a rich phase diagram for the threshold, which can be qualitatively understood in relation to the band structure of the Hermitian Kitaev model. The findings include a re-entrant PT-symmetric phase bounded by second-order exceptional point contours for an even chain with zero on-site potential.
Article
Multidisciplinary Sciences
Lixuan Zheng, Zhimian Wu, Ye Yang, Linpeng Nie, Min Shan, Kuanglv Sun, Dianwu Song, Fanghang Yu, Jian Li, Dan Zhao, Shunjiao Li, Baolei Kang, Yanbing Zhou, Kai Liu, Ziji Xiang, Jianjun Ying, Zhenyu Wang, Tao Wu, Xianhui Chen
Summary: The discovery of electronic orders in kagome superconductors AV(3)Sb(5) opens up a promising avenue for exploring new emergent physics. Pressure experiments on CsV(3)Sb(5) reveal a new CDW phase between P-c1 ≈ 0.58 GPa and P-c2 ≈ 2.0 GPa, attributed to a possible stripe-like CDW order, explaining the two-dome-like superconducting behavior under pressure. Additionally, nuclear spin-lattice relaxation measurements show evidence for pressure-independent charge fluctuations above the CDW transition temperature and unconventional superconducting pairing above P-c2.
Article
Astronomy & Astrophysics
Nils A. Nilsson
Summary: In this study, we investigate the effects of explicit spacetime-symmetry breaking on primordial tensor fluctuations using an effective-field theory for Lorentz/CPT violation. Our findings show that despite the symmetry breaking, the graviton remains massless, but the propagation speed of tensor modes is modified. We also derive a constraint on the coefficient determining the symmetry breaking based on recent measurements of the speed of gravity. Additionally, due to the symmetry breaking, the de-Sitter phase is altered, resulting in a slow oscillation of the power spectrum during the inflationary epoch. Furthermore, we observe that while the primordial tensor power spectrum maintains scale invariance, its amplitude is modified. Moreover, we find that the modes which become subhorizon during radiation domination experience a phase shift proportional to the coefficient for Lorentz violation.
Article
Multidisciplinary Sciences
Huimin Zhang, Basu Dev Oli, Qiang Zou, Xu Guo, Zhengfei Wang, Lian Li
Summary: In FeSn, we observe the symemtry-breaking and tunable electronic orders in the Kagome lattice by applying a magnetic field, providing a new avenue for studying the unique quantum states in Kagome lattice.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Jian-Jian Miao
Summary: The Majorana lattice gauge theory composed of Majorana fermions on a square lattice is thoroughly studied. The exact ground state is obtained, showing the coexistence of symmetry breaking and topological order. The Z2 symmetry breaking of matter fields leads to intertwined antiferromagnetic spin order and γ-pairing order. The topological order is reflected in the Z2 quantum spin liquid ground state of gauge fields. The Majorana lattice gauge theory can also be seen as an interacting Majorana fermion model, possibly realized on a Majorana-zero-mode lattice.
Article
Physics, Multidisciplinary
Shang-Qiang Ning, Yang Qi, Zheng-Cheng Gu, Chenjie Wang
Summary: In this work, the enforced symmetry breaking (ESB) phenomenon by fermionic invertible topological orders of a finite symmetry group Gf is studied systematically. A series of criteria on the existence or nonexistence of ESB are obtained. Many new ESB examples are discovered, and explicit results on the ESB phenomena of the continuous group SU f(N) by 2D invertible topological orders are obtained through a different argument.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Xuchuan Wu, Le Lei, Qiangwei Yin, Ning-Ning Zhao, Man Li, Zilu Wang, Qingxin Liu, Wenhua Song, Huan Ma, Pengfei Ding, Zhihai Cheng, Kai Liu, Hechang Lei, Shancai Wang
Summary: The article discusses the interplay of symmetry-breaking ordered states in correlated systems, particularly the coexistence of periodic modulation and antiferromagnetism in high-Tc superconductors. A competition mechanism between charge order and ferromagnetism is proposed, illustrating the competing relationship between the two ordered states.
Article
Mathematics
Pavel Trojovsky
Summary: The paper proves that the value of the order of appearance function z in the Fibonacci sequence is an even number for almost all positive integers.
Article
Nanoscience & Nanotechnology
Gan Liu, Tianyu Qiu, Kuanyu He, Yizhou Liu, Dongjing Lin, Zhen Ma, Zhentao Huang, Wenna Tang, Jie Xu, Kenji Watanabe, Takashi Taniguchi, Libo Gao, Jinsheng Wen, Jun-Ming Liu, Binghai Yan, Xiaoxiang Xi
Summary: In this study, electrical switching of ferro-rotational domain states in the charge-density-wave phases of nanometre-thick 1T-TaS2 crystals is demonstrated. Despite the lack of coupling between the electric field and the ferroic order due to symmetry mismatch, the electric field drives domain wall propagation, resulting in reversible, durable, and non-volatile isothermal state switching.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Michael P. Crockett, Jeanette Pina, Achyut Ranjan Gogoi, Remy F. Lalisse, Andrew Nguyen, Osvaldo Gutierrez, Andy A. . Thomas
Summary: The effects of Lewis basic phosphoramides on the aggregate structure of t-BuLi have been investigated using NMR and DFT methods. It was found that hexamethylphosphoramide (HMPA) can shift the equilibrium of t-BuLi to form a triple ion pair with HMPA4Li+, which in turn allows for the deprotonation of remote sp3 C-H bonds. These newly accessed lithium aggregation states were then leveraged to develop a simple protocol for the lithiation and capture of chromane heterocycles with alkyl halide electrophiles in good yields.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Peizhi Mai, Seher Karakuzu, Giovanni Balduzzi, Steven Johnston, Thomas A. Maier
Summary: The observation of fluctuating spin and charge stripes in the doped single-band Hubbard model using a quantum Monte Carlo dynamical cluster approximation (DCA) method demonstrates that they survive in the doped Hubbard model in the thermodynamic limit.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Particles & Fields
Chanyong Park, Gitae Kim, Ji-seong Chae, Jae-Hyuk Oh
Summary: In this study, we investigate the holographic entanglement entropy in 5-dimensional charged black brane geometry derived from Einstein-SU(2)Yang-Mills theory in asymptotically AdS space. The system undergoes a second order phase transition near the critical point, where a spatial component of the Yang-Mills fields appears. We obtain analytic solutions of holographic entanglement entropies for wide and thin slabs and a cylinder. The entanglement entropies near the critical point exhibit scaling behavior and we propose a new order parameter based on the difference between entanglement entropies in isotropic and anisotropic phases.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Optics
Andrew W. Marsh, Tyrus M. Evans, Benjamin C. Musci, Jaylon Uzodima, Sean P. Kearney, Daniel R. Guildenbecher, Yi Chen Mazumdar
Summary: Digital holography is a 3D measurement technique that can be distorted by refractive index gradients, shock waves, or thermal gradients. This paper introduces a novel RIPPH method for removing phase distortions numerically, resulting in a distortion-free 3D image. Experimental results show at least 3x lower edge distortions compared to traditional methods.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Frank Y. Gao, Zhuquan Zhang, Zhiyuan Sun, Linda Ye, Yu-Hsiang Cheng, Zi-Jie Liu, Joseph G. Checkelsky, Edoardo Baldini, Keith A. Nelson
Summary: Studying nonequilibrium hidden states is important for understanding the strong coupling between microscopic degrees of freedom in quantum materials and for the development of optoelectronic devices. Using single-shot spectroscopy techniques, the researchers were able to directly visualize the ultrafast formation of a long-lived hidden phase in the electronic crystal 1T-TaS2. They also proposed a theory of fluctuation-dominated process to explain the nature of the metastable state.
Article
Physics, Multidisciplinary
Debmalya Chakraborty, Annica M. Black-Schaffer
Summary: The coexistence of charge density waves and uniform superconductivity in d-wave superconductors generates an odd-frequency spin-singlet pair density wave, dependent on the modulation wave vector of the CDW, which can become comparable to even-frequency pair density waves in certain areas of the Brillouin zone. Experimental verification has also shown that superconductivity and uni-axial charge density waves can coexist at high magnetic fields.
NEW JOURNAL OF PHYSICS
(2021)
Article
Astronomy & Astrophysics
Run-Qiu Yang, Rong-Gen Cai, Li Li
Summary: This paper investigates the number of horizons of static black holes and finds that it is strongly constrained by the energy conditions of matter fields. The study reveals universal restrictions on the number of horizons, indicating that the presence of matter not only promotes the formation of event horizons but also prevents the appearance of multiple horizons inside black holes.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Physics, Particles & Fields
Rong-Gen Cai, Chenghu Ge, Li Li, Run-Qiu Yang
Summary: This study investigates the internal structure of anisotropic black holes with charged vector hairs. It presents the discovery of radially conserved charges and provides a general proof of no inner horizon for these black holes. The study also reveals multiple intermediate regimes and phenomena such as oscillations of vector condensate and spatial geometry.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Deng Pan, Teng Ji, Matteo Baggioli, Li Li, Yuliang Jin
Summary: This study investigates the effects of nonlinear elasticity on the mechanical and thermodynamic properties of amorphous materials responding to shear using holographic duality and gravitational theories. The predicted correlations between the nonlinear elastic exponent, yielding strain/stress, and entropy change due to shear are qualitatively supported by simulations. This research opens up new possibilities for understanding the complex mechanical responses of amorphous solids and studying the rheology of solid states and black holes in a unified framework.
Article
Physics, Multidisciplinary
Run-Qiu Yang, Li Li, Rong-Gen Cai
Summary: We propose a conjecture for the lower bound of ADM mass using the null energy condition. The conjecture is proved in specific scenarios and raises a new challenge for an unsettled question in general relativity.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Teng Ji, Li Li, Hao-Tian Sun
Summary: This paper studies the thermoelectric transport of two-dimensional quantum matter under shear strain using holographic duality. It obtains general analytic formulas for DC thermoelectric conductivities subjected to finite shear strain and discusses the effects of strain on various conductivities. The study finds a metal-insulator transition driven by the shear deformation and observes the violation of the previously conjectured thermal conductivity bound under large shear deformation.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Physics, Particles & Fields
Chen Liang, Ji-Rong Ren, Shi-Xian Sun, Yong-Qiang Wang
Summary: In this paper, we propose a model called Dirac-boson stars (DBSs), which consists of a scalar field and two Dirac fields in the ground state. We investigate the solution families of DBSs for synchronized and nonsynchronized frequencies, and discover different types of solutions within specific ranges of Dirac field mass and scalar field frequency. Compared to previous studies on multistate boson stars, our findings are unique. Furthermore, we analyze the characteristics of each solution family and establish the relationship between the ADM mass of DBSs and the frequencies. Additionally, we calculate the binding energy of DBSs and explore its correlation with the frequencies.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Yan-Qing Zhao, Song He, Defu Hou, Li Li, Zhibin Li
Summary: We study the rotation effects of hot and dense QCD matter using the gauge/gravity duality. By introducing angular velocity, we investigate the thermodynamic quantities for the rotating system and observe that the critical temperature and baryon chemical potential decrease with increasing angular velocity. We construct a 3-dimensional phase diagram of the QCD matter in terms of temperature, baryon chemical potential, and angular velocity, and also consider the gravitational model of the SU(3) pure gluon system with rotation.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Shi-Xian Sun, Li Zhao, Yong-Qiang Wang
Summary: In this paper, the static, soliton-like solutions in the model of Einstein gravity coupled to a free and complex scalar field, known as mini-boson stars, are re-investigated. A new family of solutions in addition to the typical single mini-boson star solution is discovered through numerical methods. These solutions can be interpreted as chains of boson stars along the symmetry axis. The effect of the frequency of the complex scalar field on the ADM mass M and the U(1) scalar charge Q is also studied.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Matteo Baggioli, Sera Cremonini, Laura Early, Li Li, Hao-Tian Sun
Summary: We investigate the impact of rotational symmetry breaking on the computation of the shear viscosity to entropy ratio in a holographic p-wave superfluid model. By studying the interplay between explicit and spontaneous symmetry breaking, we derive a horizon formula for η/s that is applicable even in the presence of rotational breaking and agrees well with numerical data. Despite the competition between explicit and spontaneous symmetry breaking, η/s always reaches a constant value at zero temperature, which is above the Kovtun-Son-Starinets (KSS) bound. This contrasts with previous holographic anisotropic models exhibiting a power-law vanishing of η/s at small temperatures due to different near-horizon geometry properties in the extremal limit.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Yuan Yue, Yong-Qiang Wang
Summary: Recently, researchers explored the Einstein-Maxwell-scalar model with a non-minimal coupling between the scalar and Maxwell fields and discovered a new class of black hole solutions with scalar hair. An extremal black hole was obtained by fixing the mass of a black hole and taking the maximum allowable charge. This extremal black hole, called a maximal warm hole (MWH), has both a non-zero surface area event horizon and a non-zero Hawking temperature. In this paper, the authors revisit this model and examine excited state black holes, finding that an excited state MWH solution can also be obtained under extremal conditions. The range of existence for excited states is investigated and their relevant physical properties are analyzed.
Article
Physics, Particles & Fields
Yuan Yue, Peng-Bo Ding, Yong-Qiang Wang
Summary: In this paper, the model of bosonic matter with a nontrivial wormhole spacetime topology supported by a free phantom field is revisited. A new type of boson star with wormhole solutions, where the complex scalar field possesses full parity-odd symmetry, is obtained. The behavior of boson stars with wormhole approaches that of boson stars when the size of the throat is small, but is replaced by a loop structure when the size of the throat is intermediate. The complex scalar field can form two boson stars with opposite phase differences in the limit of vanishing throat size.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Tian-Xiang Ma, Chen Liang, Jie Yang, Yong-Qiang Wang
Summary: In this paper, we construct a hybrid boson star model composed of a complex scalar field and a Proca field, and obtain families of solutions for different mixed states through numerical calculations. The characteristics of these solutions are analyzed by examining the relation between the ADM mass and the synchronized or nonsynchronized frequency. The binding energy of the hybrid Proca-boson stars is calculated, and the stability of the corresponding solution families is also investigated.
Article
Physics, Particles & Fields
Yu-Ping An, Li Li
Summary: We have proven the absence of charged scalar hair for static black holes in de-Sitter spacetime between the event horizon and the cosmological horizon. The proof is not dependent on the assumption of spherical symmetry and allows for general non-minimal coupling functions and higher curvature term corrections. This result has implications for the possibility of spontaneous scalarization around charged de-Sitter black holes.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
Shi-Xian Sun, Li Zhao, Yong-Qiang Wang
Summary: In this paper, we investigate the static, soliton-like solutions in the model of the Einstein gravity coupled to a free and complex scalar field. We discover a new family of solutions, which can be interpreted as chains of boson stars consisting of multiple boson stars along the symmetry axis. We also study the effect of the frequency of the complex scalar field on the ADM mass and the U(1) scalar charge.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Zhibin Li, Jingmin Liang, Song He, Li Li
Summary: Baryon number fluctuations can be used to explore the QCD phase diagram experimentally, and may provide insights into the critical endpoint (CEP). We used a holographic QCD model to compute higher-order baryon number susceptibilities and found that the model agrees well with experimental data, suggesting that it can be used to locate the CEP.
