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Chihiro Matsui (The University of Tokyo)6/1/26, 11:00 AM
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Masaya Kunimi (Tokyo University of Science)6/1/26, 12:15 PM
Quantum many-body scar (QMBS) states, which are special energy eigenstates that violate the eigenstate thermalization hypothesis in nonintegrable systems, have attracted much attention. Recently, asymptotic quantum many-body scar (AQMBS) states, which are closely related to QMBS states, have been proposed [1]. AQMBS states exhibit nonergodic behavior because their energy variance vanishes in...
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Shin Nakamura (Chuo University)6/1/26, 4:00 PM
The fluctuation–response inequality (FRI), proposed by Dechant and Sasa, is a general relation between fluctuations and responses in nonequilibrium systems. For instance, the FRI states that the ratio of the effective temperature to the differential mobility of a test particle in a thermal bath is a non-decreasing function of the particle’s velocity. In this work, we compute both the effective...
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Hugo A. Camargo (National Center for Theoretical Sciences, Physics Division)6/2/26, 11:00 AM
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Michael Blake (University of Bristol (UK))6/2/26, 12:15 PM
The last decade has seen significant interest in dissipative hydrodynamical actions in the Schwinger-Keldysh formalism. However there remain very few examples where such actions can be explicitly constructed. I will present a novel prescription that allows, for the first time, one to consistently compute such actions for holographic quantum field theories in general bulk dimension. The...
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Yuuya Chiba (RIKEN)6/2/26, 4:00 PM
The second law of thermodynamics for adiabatic operations --- constraints on state transitions in closed systems under external control --- is one of the fundamental principles of thermodynamics. On the other hand, recent studies of thermalization have established that even pure quantum states can represent thermal equilibrium. However, pure quantum states do not satisfy the second law in that...
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Jong Yeon Lee (University of Illinois Urbana-Champaign)6/3/26, 9:30 AM
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Alexander Altland (University of Cologne)6/3/26, 11:00 AM
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Anatoly Dymarsky (University of Kentucky)6/4/26, 9:30 AM
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Shiraz Minwalla (Tata Institute of Fundamental Research)6/4/26, 11:00 AM
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Shuta Ishigaki (Shanghai University)6/4/26, 12:15 PM
The Mpemba effect is a counterintuitive phenomenon in which hotter substances cool down faster. This phenomenon can be observed under limited conditions. On the other hand, the quantum Mpemba effect (QME) is quantum analogue of it by replacing the temperature with other quantities. The QME may have various origins but it is helpful if we can understand its common mechanism. To shed light on...
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Kazuaki Takasan (The University of Tokyo)6/4/26, 2:30 PM
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Sumiran Pujari (Indian Institute of Technology Bombay)6/4/26, 4:00 PM
Weak first-order pseudocriticality with approximate scale invariance has been observed in a variety of settings, including the intriguing case of deconfined criticality in 2+1 dimensions. Recently, this has been interpreted as extremely slow flows ("walking behavior") for real-valued couplings in proximity to a bona fide critical point with complex-valued couplings, described by a complex...
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Jian Xian Sim (Center for Quantum Technologies Singapore)6/4/26, 4:30 PM
Non-equilibrium dynamics of strongly and rapidly driven quantum many-body systems is poorly understood beyond periodic driving, where heating is exponentially slow in the drive frequency (Floquet Prethermalization). In contrast, non-periodic drives were found to exhibit widely different heating scalings with no unifying principle. This work identifies a resonance-suppression principle...
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Masaru Hongo (Niigata Universiity)6/5/26, 9:30 AM
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Keisuke Fujii (Institute of Science Tokyo)6/5/26, 11:00 AM
The hydrodynamic attractor is a concept that describes universal equilibration behavior in which systems lose microscopic details before hydrodynamics becomes applicable. We propose a setup to observe hydrodynamic attractors in ultracold atomic gases, taking advantage of the fact that driving the two-body s-wave scattering length causes phenomena equivalent to isotropic fluid expansions. We...
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Bruno Bertini (University of Birmingham)6/5/26, 11:45 AM
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Tanay Pathak (Kyoto University)6/5/26, 2:30 PM
We study the dynamics of mixed-state entanglement in a minimal model of quantum chaos, the kicked field Ising model, using a class of solvable initial states. By combining the replica trick with the space-time duality of the model, we show that the exact spectrum of the partially transposed reduced density matrix is flat at early times. This leads to exact relations between entanglement...
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Teruaki Nagasawa (Kanazawa University)6/5/26, 3:00 PM
Thermalization and gravity have one thing in common: they do not align well with quantum mechanics. One possible explanation for this is that these phenomena are macroscopic rather than microscopic. So, what does it mean to be 'macro'? Furthermore, these phenomena may be characterized by the fact that they are described as relative to each observer. In order to address these questions, we will...
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Shozo Yamada (The University of Tokyo)6/5/26, 3:45 PM
While thermalization in isolated quantum many-body systems can be explained by the eigenstate thermalization hypothesis, its process can be nonmonotonic depending on an initial state. In this talk, we propose a numerical method to construct a low-entangled initial state that creates a “burst”——a transient deviation of an expectation value of an observable from its thermal equilibrium value——at...
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