2025-08-27
10:24 |
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Limits of EFTs at finite temperature for strong phase transitions
/ Bernardo, Fabio (speaker)
Phase transitions are violent and interesting phenomena that could have occurred in the early universe. Possible techniques to study these phenomena can be used in the presence of a hierarchy of scales, leading to the construction of finite temperature Effective Field Theories by integrating out heavier scales. [...]
2025 - 510.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-27
10:24 |
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Bubble wall velocity from hydrodynamics
/ Zych, Mateusz (speaker) (University of Warsaw)
Terminal velocity of bubble walls in cosmological first-order phase transitions is a key parameter affecting both the primordial gravitational wave signal and baryon asymmetry production in electroweak baryogenesis. In this talk, I present recent results showing that, under local thermal equilibrium, pure hydrodynamic backreaction can lead to steady-state expansion, as confirmed by numerical simulations. [...]
2025 - 474.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-27
09:58 |
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Examples of GW from FOPT and WallGo
/ Velasco-Sevilla, Liliana (speaker) (Sogang University, South Korea)
Examples of GW from FOPT in BSM models and WallGo: I present three examples of BSM producing GW: one from SO(10) from the breaking chain $SU(3)_C\times SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ (2506.07182), another from a first-order phase transition of the inflaton coupled to a dark sector (2412.17278) and the third one from reheating through particle production. As we know, uncertainties in the fundamental parameters affect the phase transition observables. [...]
2025 - 426.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-27
09:57 |
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Bounds on bubble wall velocity and application to first-order QCD phase transition
/ Laurent, Benoit (speaker) (CEA / DAM Ile de France (FR))
In this talk, I will take advantage of recent progress on wall speed determination to provide simple estimates that constrain the wall velocity between two opposite limits: local thermal equilibrium and ballistic. The description of the wall velocity in these limits is significantly simplified compared to conventional methods, which allows for the derivation of analytic formulas valid for slow walls. [...]
2025 - 2724.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-27
09:47 |
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Bubble-wall velocity with loop corrections
/ Dashko, Andrii (speaker) (DESY Theory)
In this work, the dynamics of the nucleating scalar field is investigated during
the first-order phase transitions by incorporating one-loop corrections of classical fluctuations.
We contrast our results with traditional methods based on the derivative expansion; show that the latent heat can differ from the effective-potential result; and discuss general hydrodynamic corrections. [...]
2025 - 2798.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-26
17:08 |
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2025-08-26
17:08 |
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Bubble nucleation vs phase mixing around the spinodal temperature
/ Jung, Taehyun (speaker) (Institute for Basic Science)
Phase transitions, in general, involve a nonzero spinodal temperature at which the potential barrier disappears. In some models of cosmological first-order phase transitions, supercooling is maintained until around the spinodal temperature, so the phase transition proceeds during the time when the potential barrier disappears rapidly. [...]
2025 - 2713.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-26
16:40 |
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An effective-theory perspective on bubble nucleation and growth
/ Laine, Mikko Sakari (speaker) (Universitaet Bern (CH))
Certain aspects of phase transition dynamics, at least the initial nucleations and subsequent growth, can be described within the framework of fluctuating hydrodynamics, extended by a scalar order parameter. A strength of this formulation is that the contributions of small and large momenta can be factorized. [...]
2025 - 2600.
TH institutes; Advancing gravitational wave predictions from cosmological first-order phase transitions
External links: Talk details; Event details
In : Advancing gravitational wave predictions from cosmological first-order phase transitions
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2025-08-14
09:38 |
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Exploring the Hilbert Space of Quantum Field Theory with Hamiltonian Truncation
/ Luty, Markus (speaker) (University of California)
This talk will give a personal view of Hamiltonian truncation for quantum field theory. This is a variational approximation of quantum field theory formulated directly in the continuum, in which the Hamiltonian of the theory is numerically diagonalized on a large but finite subspace of states. This method can preserve symmetries that are broken by the lattice, for example chiral symmetries and supersymmetry, and therefore can be applied to theories that are otherwise inaccessible to numerical approximation [...]
2025 - 4152.
Theory Colloquia
External link: Event details
In : Exploring the Hilbert Space of Quantum Field Theory with Hamiltonian Truncation
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2025-08-07
12:08 |
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Recent developments on integrable QFTs at finite density
/ Serone, Marco (speaker) (SISSA)
Understanding strongly interacting matter at finite density, such as QCD, remains a major challenge.Insight can be gained from simpler theories like the $O(2N)$ symmetric 2d Gross-Neveu (GN) model. The GN model with chemical potentials has been studied for decades using diverse techniques and motivations: from exact scale-mass relations to inhomogeneous phases and, more recently, resurgence and renormalons.We review these developments and unify them into a coherent framework for arbitrary $U(1)$ chemical potentials $h$. At finite $N$, two nonperturbative scales $\Lambda_\mathrm{n}$ and $\Lambda_\mathrm{c}$ emerge, governing neutral and charged fermion masses. [...]
2025 - 4570.
Theory Colloquia
External link: Event details
In : Recent developments on integrable QFTs at finite density
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