Abstract The principal aim of this talk is to draw the attention of the Chinese high-energy community to the exciting Beyond Standard Model (BSM) physics offered by spin experiments in storage rings (SR). SR-based searches for the electric dipole moment of charged particles have the potential to uncover the origin of BSM CP-violation, which is badly needed to explain the observed baryogenesis in the Universe. I will briefly comment on the classic results of JEDY@COSY and the ongoing activity of the CPEDM@CERN, srEDM@BNL, and SPRINT@NICA (JINR) collaborations in this direction. My major focus will be on the spin in SRs as a broadband antenna for axions and axion-like particles. A beauty of SRs is the relativistic enhancement by a factor of 1000 of a pseudomagnetic field induced by the axion halo of our Galaxy. I comment on new ideas for searching for SM parity violation based on the JEDI experience with precessing horizontal polarization. Next, I move to a so far little-explored BSM C-odd and T-odd millistrong interaction postulated in 1965 by Okun, Lee, Wolfenstein, Prentky, and Veltman as a source of CP violation. Here, precessing polarization would allow systematics-free extraction of T-violation in pd scattering. As a cherry on the cake, I will comment on the unique discovery potential of precessing polarization targets and share my excitement that a remarkably close idea is being pursued by Dr. Boxing Gou of the Institute of Modern Physics, Lanzhou.

Biography
Nikolai Nikolaevich Nikolaev, born 20.05.1947, Mari El Republic, Russia. Moscow Institute of Physics and Technology (1964-1970), with honors. PhD student (1970-1973) at MIPT, supervisor Lev Borisovich Okun. Since 1973 at the Landau Institute for Theoretical Physics. Other positions: Research fellow at the Theory Division, CERN (1978-1979); Visiting professor at the University of Torino, Italy (1990-1991); Senior researcher, Institut f. Kernphysik, Forschungszentrum Juelich, Germany (1993-2012). Major Research interests: electroweak interactions, formation length in nuclear interactions, pre-QCD parton model, antishadowing phenomenon, QCD formalism for DIS on nuclear targets; QCD theory of color transparency and diffractive DIS; spin filtering in storage rings; quantum collective betatron oscillations, general relativity effects for spins in storage rings, spin dynamics in precision searches for the EDM and axion-like particles in storage ring experiments. H-index 45, 8600+ citations, sample publications:
- N. N. Nikolaev, B. G. Zakharov, Color transparency and scaling properties of nuclear shadowing in deep inelastic scattering, DOI: 10.1007/BF01483577, Z.Phys.C 49 (1991), 607-618.
- S. N. Vergeles, N. N. Nikolaev, Yu. N. Obukhov, A. Ya. Silenko, O. V. Teryaev, General relativity effects in precision spin experimental tests of fundamental symmetries, Usp.Fiz.Nauk 193 (2023) 2, 113-154, DOI: 10.3367/UFNe.2021.09.039074 , 10.3367/UFNe.2021.09.039074
- N. N. Nikolaev et al. (JEDI Collaboration), Spin decoherence and off-resonance behavior of radio-frequency-driven spin rotations in storage rings, Phys.Rev.Accel.Beams 27 (2024) 11, 111002, DOI: 10.1103/PhysRevAccelBeams.27.111002

This talk will present how the principles of spin dynamics serve as the foundation for unifying quantum mechanics with general relativity. This unification gives rise to a Gravitational Quantum Field Theory (GQFT), which predicts new gravitational wave polarizations associated with spin phenomena, and a General Theory of the Standard Model (GSM), offering a unified framework for particle physics and cosmology. Furthermore, its extension into hyper-spin dynamics allows for the development of a Hyperunified Field Theory (HUFT), a single framework encompassing all fundamental interactions and elementary particles. Such a theory is crucial for understanding the nature of spacetime and gravity and for addressing profound mysteries of the universe, including dark matter, dark energy, and inflation. Ultimately, we expect gravitational wave astronomy to provide a powerful new probe into the gravitational universe.

Biography
Prof. Yue-Liang Wu, theoretical physicist, is a member of the Chinese Academy of Sciences (CAS), TWAS and the International Eurasian Academy of Sciences. He has served as the director of the International Centre for Theoretical Physics Asia-Pacific (ICTP-AP, UNESCO), the academic vice-president of the University of Chinese Academy of Sciences (UCAS), and the chief scientist of the Taiji Program in Space for Gravitational Wave Detection in China. He graduated from Nanjing University in 1982, received his Ph.D. from the Institute of Theoretical Physics (ITP) at CAS in 1987, worked at Dortmund University and Mainz University in Germany and at Carnegie-Mellon University and Ohio-State University in the USA from 1987 to 1996, and has been working at the Institute of Theoretical Physics at CAS since 1996.

In this talk, I will discuss quantum states in Kagome lattices with the time reversal symmetry breaking. Both theory and recent experimental progress will be reviewed. A brief review of this type of states will be given for cuprates and Kagome lattice superconductors. We will discuss a specific model to show the existence of loop current states which break the time reversal symmetry as ground states. In particular, we will address the superconducting diode effect can be used to probe such quantum states.

BIOGRAPHY
Prof. Jiang-Ping Hu is currently a researcher and the Deputy Director of the Institute of Physics, Chinese Academy of Sciences. He received his BS from Peking University in 1994, MS from the Institute of Theoretical Physics of the Chinese Academy of Sciences in 1997 and PhD from Stanford University in 2002. His main research interests are theoretical condensed matter physics. He has made seminal contributions to topological physics, high-temperature superconductivity, and strongly correlated electron theory, with more than 280 publications and an H-index of 85. He was selected to be a Fellow of the American Physical Society in 2018, and was awarded the Zhou Peiyuan Prize for Physics in 2019, a New Stone Researcher in 2023.

In this talk, I will discuss the rapidly developing field of nonreciprocal effects in superconducting transport, also known as the superconducting diode effect. The essence of this phenomenon lies in the asymmetry of a system’s properties when a supercurrent flows in opposite directions. Such an effect requires the simultaneous breaking of time-reversal and inversion symmetries. The underlying physical mechanisms can vary significantly, including effects of magnetic (and, more specifically, exchange) fields, spin-orbit interactions, and geometric asymmetry of the system. These effects can lead to nonreciprocal charge transport both in systems homogeneous along the current direction and in Josephson junctions.

BIOGRAPHY
Prof. Yakov Fominov holds two PhDs in Theoretical Physics — one from the Kapitza Institute (Russia, 2003) and another from the University of Twente (Netherlands, 2003) — as well as a Doctor of Physics and Mathematics degree from the Landau Institute (2019). Since 2005, he has been a permanent member of the Landau Institute, where he currently serves as Deputy Director. Since 2023, he has also headed the Chair for Problems in Theoretical Physics (Gor’kov Theory Group) at the Moscow Institute of Physics and Technology. His research focuses on the superconducting proximity effect in hybrid structures (including normal and ferromagnetic metals), the Josephson effect in mesoscopic junctions, odd-frequency superconductivity, and superconducting spin valves.

Abstract

In this talk, I will discuss the microscopic theory for the attenuation of out-of-plane and in-plane phonons in free-standing and stressed flexible two-dimensional crystalline materials. In the free-standing case, it is possible to find exactly the scaling form of the attenuation, determine its small- and large-frequency asymptotes, and to derive the exact expression for the dynamical exponent of flexural phonons in the long-wave limit. In the stressed case, the presence of nonzero tension strongly reduces the relative magnitude of the phonon's attenuation and, consequently, results in parametrical narrowing of the phonon spectral line due to stress-controlled suppression of the retardation effects in the dynamically screened inter phonon interaction. I will discuss how suppression of the phonon attenuation by nonzero tension might be responsible for high quality factors of mechanical nanoresonators based on flexural two-dimensional materials.

Biography

Prof. Igor Burmistrov received two Ph.D.s in Theoretical Physics (in 2004 from Landau Institute and in 2006 from University of Amsterdam) and a Doctor of Physics and Mathematics degree in 2012 from Landau Institute. Since 2006, he is a permanent member of Landau Institute holding now the position of the deputy director. In 2017–2020, he was also a Humboldt fellow at Karlsruhe Institute of Technology. He is APS Outstanding Referee (2021). In 2022, he was elected as Professor of Russian Academy of Sciences. His research area includes electron transport in low dimensional systems, superconductivity, magnetism, elasticity of flexible two-dimensional materials, physics of open and dissipative systems. He has authored more than 110 peer-reviewed papers.

Abstract

Two-dimensional correlated electronic systems present a fundamental challenge in condensed matter and quantum physics. Thermal tensor networks have emerged as a powerful tool for finite-temperature studies of many-electron systems. In this talk, I will present our recent advances in thermal tensor network methods, focusing on two recent developments: (1) exponential tensor renormalization group (XTRG), which achieves exponential acceleration through density matrix operator squaring, and (2) the efficient tangent-space tensor renormalization group (tanTRG) that incorporates time-dependent variational principle (TDVP) techniques. Our tensor network methods enable accurate low-temperature simulations of fundamental models like the Hubbard and t-J Hamiltonians, as well as material-specific applications such as the t-t'-J model for cuprates and the t-t-J⊥ model for bilayer nickelate superconductors.

Biography

Dr. Wei Li obtained his Ph.D. in Theoretical Physics from CAS in 2012, followed by postdoctoral research at Ludwig-Maximilians-Universität München (2012–2015). He served as an Associate Professor at Beihang University before joining the Institute of Theoretical Physics (ITP-CAS) as a Research Scientist in 2021. His research focuses on strongly correlated quantum systems, including quantum magnetism and correlated electron phenomena, development of novel tensor-network methods, and applications to cutting-edge problems in many-body physics. He has published over 80 papers in leading journals including Nature, Nature Physics, and PRL. He currently leads a CAS-sponsored Youth Innovation Team focused on foundational research in quantum many-body physics and applications.

Abstract

Atmospheric optical turbulence effects on light waves are one of the key limiting factors affecting the efficiency of photoelectric systems. Currently, the characteristics of atmospheric optical turbulence in the upper troposphere and lower stratosphere are still not well understood or thoroughly studied. By integrating ground-based, radiosonde, and in-situ detection methods, observations of atmospheric optical turbulence have been conducted in typical regions of China. Based on these observations, statistical models and parameterized models of upper atmospheric optical turbulence have been established. Combined with a mesoscale meteorological model and a single-column meteorological model based on high-order turbulence closure, prediction models have been developed to derive the temporal and spatial distribution of optical turbulence intensity. This research provides important technical and data support for the demonstration and application of photoelectric systems in the upper atmosphere.

Biography

Dr. Tao Luo received his doctoral degree in space science from University of Science and Technology of China in 2008. He is currently a professor at Hefei Institutes of Physical Science, Chinese Academy of Sciences (CAS), and the deputy director of the Key Laboratory of Atmospheric Optics, CAS. His research area includes atmospheric boundary layer processes, atmospheric turbulence characteristics, and active and passive atmospheric remote sensing. He has authored more than 80 peer-reviewed papers.

Abstract

The talk is devoted to modern development in turbulence in effectively two-dimensional systems, which include thin layers of liquid and the Earth's atmosphere. If the system is limited in size, then in a certain range of parameters, turbulent fluctuations generate a coherent vortex flow. In other words, energy is transferred from chaotic flows to regular ones. It turns out that the structure of the resulting vortices can largely be described analytically. In addition, the very possibility of vortices depends on the ratio between relatively small dissipative constants.

Biography

Prof. Igor V. Kolokolov received his Ph.D. in Theoretical Physics in 1990 and a Doctor of Physics and Mathematics degree in 1998 from the Budker Institute of Nuclear Physics, Novosibirsk. He started his career as a Leading Researcher at the same institute from 1986 to 2003. Between 1993 and 1995, he completed a Postdoctoral Fellowship at INFN, University of Milano, Italy. He joined the Landau Institute of Theoretical Physics in Chernogolovka in 2002 and held positions as deputy director (2003–2018), acting director (2018–2019), and has been director since 2019. He teaches at multiple institutions and has published a textbook "Mathematical Methods of Physics: Problems with Solutions" (Jenny Stanford Publishing, 2024).