Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Paul Romatschke"'
Autor:
Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-17 (2024)
Abstract Out-of-time-ordered-correlators (OTOCs) have been suggested as a means to diagnose chaotic behavior in quantum mechanical systems. Recently, it was found that OTOCs display exponential growth for the inverted quantum harmonic oscillator, mir
Externí odkaz:
https://doaj.org/article/4700ac10860e4b09a79a2dda43eb26be
Autor:
Paul Romatschke
Publikováno v:
AppliedMath, Vol 4, Iss 1, Pp 55-69 (2024)
If a quantum field theory has a Landau pole, the theory is usually called ‘sick’ and dismissed as a candidate for an interacting UV-complete theory. In a recent study on the interacting 4d O(N) model at large N, it was shown that at the Landau po
Externí odkaz:
https://doaj.org/article/fddc38cad9654e7ebea88cacf5de847a
Autor:
Paul Romatschke
Publikováno v:
Physics Letters B, Vol 847, Iss , Pp 138270- (2023)
Traditionally, scalar ϕ4 theory in four dimensions is thought to be quantum trivial in the continuum. This tradition is apparently well grounded both in physics arguments and mathematical proofs. Digging into the proofs one finds that they do not ac
Externí odkaz:
https://doaj.org/article/4999f8368aaa49f8914708af58d083c4
Determining all thermodynamic transport coefficients for an interacting large N quantum field theory
Autor:
Max Weiner, Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-16 (2023)
Abstract Thermodynamic transport coefficients can be calculated directly from quantum field theory without requiring analytic continuation to real time. We determine all second-order thermodynamic transport coefficients for the uncharged N-component
Externí odkaz:
https://doaj.org/article/a17756f09ace4a86bc15dedbbccd2cbb
Autor:
Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-18 (2021)
Abstract Out-of-time-ordered correlators (OTOCs) have been suggested as a means to study quantum chaotic behavior in various systems. In this work, I calculate OTOCs for the quantum mechanical anharmonic oscillator with quartic potential, which is cl
Externí odkaz:
https://doaj.org/article/99604c4ccea743d2966ba3bb92995ce8
Autor:
Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-12 (2020)
Abstract To set the stage, I discuss the β-function of the massless O(N) model in three dimensions, which can be calculated exactly in the large N limit. Then, I consider SU(N) Yang-Mills theory in 2+1 space-time dimensions. Relating the β-function
Externí odkaz:
https://doaj.org/article/ab4469161de34988871acab05ba94102
Autor:
Oliver DeWolfe, Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-10 (2019)
Abstract Pure CFTs have vanishing β-function at any value of the coupling. One example of a pure CFT is the O(N) Wess-Zumino model in 2+1 dimensions in the large N limit. This model can be analytically solved at finite temperature for any value of t
Externí odkaz:
https://doaj.org/article/f3ffea2edfb04778b35c1196c5a8887b
Autor:
Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-16 (2019)
Abstract I present a sequence of non-perturbative approximate solutions for scalar ϕ 4 theory for arbitrary interaction strength, which contains, but allows to systematically improve on, the familiar mean-field approximation. This sequence of approx
Externí odkaz:
https://doaj.org/article/e3478b7f720d4104a05249f148d45543
Autor:
Masanori Hanada, Paul Romatschke
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-20 (2019)
Abstract We perform microcanonical classical statistical lattice simulations of SU(N) Yang-Mills theory with eight scalars on a circle. Measuring the eigenvalue distribution of the spatial Wilson loop we find two distinct phases depending on the tota
Externí odkaz:
https://doaj.org/article/8bcdc7ba552f4514a68797fa991443b1
Publikováno v:
Physics Letters B, Vol 785, Iss , Pp 201-206 (2018)
We consider phenomenological consequences arising from simple analytic solutions for holographic heavy-ion collisions. For these solutions, early-time longitudinal flow is initially negative (inward), sizable direct, elliptic, and quadrangular flow i
Externí odkaz:
https://doaj.org/article/2b4f19c8afd94d128e97ee4400a125f6