More Like this

1. Entanglement and interface conditions on fields

   https://doi.org/10.1103/PhysRevD.111.105027  

   Maj, Antonina; Nair, V P (May 2025, Physical Review D)

   We consider the vacuum wave function of a free scalar field theory in space partitioned into two regions, with the field obeying Robin conditions (of parameter $\kappa$) on the interface. A direct integration over fields in a subregion is carried out to obtain the reduced density matrix. This leads to a constructive proof of the Reeh-Schlieder theorem. We analyze the entanglement entropy as a function of the Robin parameter $\kappa$. We also consider a specific conditional probability as another measure of entanglement which is more amenable to analysis of the dependence on interface conditions. Finally, we discuss a direct calculation of correlation functions and how it gives an alternate route to the reduced density matrix. Published by the American Physical Society2025 

   more » « less
2. Radiative Corrections to Superallowed $\beta$ Decays in Effective Field Theory

   https://doi.org/10.1103/PhysRevLett.133.211801  

   Cirigliano, Vincenzo; Dekens, Wouter; de_Vries, Jordy; Gandolfi, Stefano; Hoferichter, Martin; Mereghetti, Emanuele (November 2024, Physical Review Letters)

   The accuracy of $V_{ud}$determinations from superallowed $\beta$decays critically hinges on control over radiative corrections. Recently, substantial progress has been made on the single-nucleon, universal corrections, while nucleus-dependent effects, typically parametrized by a quantity ${\delta }_{\mathrm{NS}}$, are much less well constrained. Here, we lay out a program to evaluate this correction from effective field theory (EFT), highlighting the dominant terms as predicted by the EFT power counting. Moreover, we compare the results to a dispersive representation of ${\delta }_{\mathrm{NS}}$and show that the expected momentum scaling applies even in the case of low-lying intermediate states. Our EFT framework paves the way toward calculations of ${\delta }_{\mathrm{NS}}$and thereby addresses the dominant uncertainty in $V_{ud}$. Published by the American Physical Society2024 

   more » « less
3. Treelike structure of symmetry topological field theories and multisector QFTs

   https://doi.org/10.1103/PhysRevD.109.106013  

   Baume, Florent; Heckman, Jonathan J; Hübner, Max; Torres, Ethan; Turner, Andrew P; Yu, Xingyang (May 2024, Physical Review D)

   The global symmetries of a $D$-dimensional quantum field theory (QFT) can, in many cases, be captured in terms of a ( $D+1$)-dimensional symmetry topological field theory (SymTFT). In this work we construct a ( $D+1$)-dimensional theory which governs the symmetries of QFTs with multiple sectors which have connected correlators that admit a decoupling limit. The associated symmetry field theory decomposes into a SymTree, namely a treelike structure of SymTFTs fused along possibly nontopological junctions. In string-realized multisector QFTs, these junctions are smoothed out in the extradimensional geometry, as we demonstrate in examples. We further use this perspective to study the fate of higher-form symmetries in the context of holographic large $M$averaging where the topological sectors of different large $M$replicas become dressed by additional extended operators associated with the SymTree. Published by the American Physical Society2024 

   more » « less
4. Revisiting the Helium Isotope-Shift Puzzle with Improved Uncertainties from Nuclear Structure Corrections

   https://doi.org/10.1103/PhysRevLett.134.032502  

   Li_Muli, Simone Salvatore; Richardson, Thomas R; Bacca, Sonia (January 2025, Physical Review Letters)

   Measurements of the difference between the squared charge radii of the helion ( ${}^3\mathrm{He}$nucleus) and the $\alpha$particle ( ${}^4\mathrm{He}$nucleus) have been characterized by longstanding tensions recently spotlighted in the $3.6\sigma$discrepancy of the extractions from ordinary atoms versus those from muonic atoms [Karsten Schuhmann , ]. Here, we present a novel analysis of uncertainties in nuclear structure corrections that must be supplied by theory to enable the extraction of the difference in radii from spectroscopic experiments. We use modern Bayesian inference techniques to quantify uncertainties stemming from the truncation of the chiral effective field theory expansion of the nuclear force for both muonic and ordinary atoms. With the new nuclear structure input, the helium isotope-shift puzzle cannot be explained, rather, it is reinforced to a $4\sigma$discrepancy. Published by the American Physical Society2025 

   more » « less
5. Class $\mathcal{S}$ Superconformal Indices from Maximal Supergravity

   https://doi.org/10.1103/PhysRevLett.134.181601  

   Bhattacharya, Ritabrata; Katyal, Abhay; Varela, Oscar (May 2025, Physical Review Letters)

   We present a new gauging of maximal supergravity in five spacetime dimensions with gauge group containing ISO(5), involving the local scaling symmetry of the metric, and admitting a supersymmetric anti–de Sitter vacuum. We show this maximal supergravity to arise by consistent truncation of M theory on the (nonspherical, nonparallelizable) six-dimensional geometry associated to a stack of $N$M5 branes wrapped on a smooth Riemann surface. The existence of this truncation allows us to holographically determine the complete, universal spectrum of light operators of the dual four-dimensional $\mathcal{N}=2$theory of class $\mathcal{S}$. We then compute holographically the superconformal index of the dual field theory at large $N$, finding perfect agreement with previously known field theory results in specific limits. Published by the American Physical Society2025 

   more » « less