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We demonstrate that the Ising model on a general triangular graph with 3 distinct couplings $K_1,K_2,K_3$ corresponds to an affine transformed conformal field theory (CFT). Full conformal invariance of the $c= 1/2$ minimal CFT is restored…

高能物理 - 理论 · 物理学 2023-08-02 Richard C. Brower , Evan K. Owen

We implement a version of conformal field theory (CFT) that gives a connection to SLE in a multiply connected domain. Our approach is based on the Gaussian free field and applies to CFTs with central charge $c \leq 1$. In this framework we…

数学物理 · 物理学 2024-07-12 Tom Alberts , Sung-Soo Byun , Nam-Gyu Kang

Fermi edge adsorption singularities (FES) are studied using a combination of conformal field theory (CFT), an exact sum rule and numerical work on a tight binding model which is shown to exhibit remarkable simplifying features. The…

凝聚态物理 · 物理学 2009-10-30 Alexandre M. Zagoskin , Ian Affleck

In various dimensions, we can sometimes compute observables of interacting conformal field theories (CFTs) that are connected to free theories via the renormalization group (RG) flow by computing protected quantities in the free theories.…

高能物理 - 理论 · 物理学 2018-02-28 Matthew Buican , Zoltan Laczko

Recently introduced ''fuzzy sphere'' method has enabled accurate numerical regularizations of certain three-dimensional (3D) conformal field theories (CFTs). The regularization is provided by the non-commutative geometry of the lowest…

统计力学 · 物理学 2025-07-25 Cristian Voinea , Ruihua Fan , Nicolas Regnault , Zlatko Papić

We calculate the free energies $F$ for $U(1)$ gauge theories on the $d$ dimensional sphere of radius $R$. For the theory with free Maxwell action we find the exact result as a function of $d$; it contains the term $\frac{d-4}{2} \log R$…

高能物理 - 理论 · 物理学 2015-11-02 Simone Giombi , Igor R. Klebanov , Grigory Tarnopolsky

We study the natural scheme-independent quantity obtained from the three-sphere partition function of a $(2+1)$-dimensional quantum field theory by removing all local counterterm ambiguities. At conformal fixed points this quantity equals…

高能物理 - 理论 · 物理学 2026-05-20 Giacomo Santoni , Francesco Scardino

In an effort to further the study of amplitudes in the celestial CFT (CCFT), we construct conformal primary wavefunctions for massive fermions. Upon explicitly calculating the wavefunctions for Dirac fermions, we deduce the corresponding…

高能物理 - 理论 · 物理学 2020-12-30 Sruthi A. Narayanan

A four-dimensional Abelian gauge field can be coupled to a 3d CFT with a $U(1)$ symmetry living on a boundary. This coupling gives rise to a continuous family of boundary conformal field theories (BCFT) parametrized by the gauge coupling…

高能物理 - 理论 · 物理学 2019-06-26 Lorenzo Di Pietro , Davide Gaiotto , Edoardo Lauria , Jingxiang Wu

A mathematical construction of the conformal field theory (CFT) associated to a compact torus, also called the "nonlinear Sigma-model" or "lattice-CFT", is given. Underlying this approach to CFT is a unitary modular functor, the…

数学物理 · 物理学 2011-05-25 Hessel Posthuma

We describe the dynamics of a single fermion in a dispersionless band coupled to the 2+1 dimensional conformal field theory (CFT) describing the quantum phase transition of a bosonic order parameter with N components. The fermionic spectral…

强关联电子 · 物理学 2014-07-30 Andrea Allais , Subir Sachdev

Fuzzy sphere models conjecturally realize 3d CFTs in small systems of spinful fermions, but why they work so well is still not fully understood. Their Hamiltonians are built from electron density operators projected to the lowest Landau…

强关联电子 · 物理学 2026-03-06 Luisa Eck , Zhenghan Wang

Conformal field theory (CFT) has been extremely successful in describing large-scale universal effects in one-dimensional (1D) systems at quantum critical points. Unfortunately, its applicability in condensed matter physics has been limited…

强关联电子 · 物理学 2017-02-15 Jérôme Dubail , Jean-Marie Stéphan , Jacopo Viti , Pasquale Calabrese

We demonstrate that the fidelity between a pure state trivial insulator and the mixed state density matrix of a Chern insulator under decoherence can be mapped to a variety of two-dimensional conformal field theories (CFT); more…

强关联电子 · 物理学 2024-01-25 Kaixiang Su , Nayan Myerson-Jain , Cenke Xu

We present the first mathematical analysis of stochastic density functional theory (DFT) in the context of the Hartree approximation. We motivate our analysis via the notion of nearly-optimal or $\tilde{O}(n)$ scaling with respect to the…

数值分析 · 数学 2025-06-03 Yuhang Cai , Michael Lindsey

We formulate two-dimensional rational conformal field theory as a natural generalization of two-dimensional lattice topological field theory. To this end we lift various structures from complex vector spaces to modular tensor categories.…

高能物理 - 理论 · 物理学 2009-11-07 J. Fuchs , I. Runkel , C. Schweigert

We derive general bounds on operator dimensions, central charges, and OPE coefficients in 4D conformal and N=1 superconformal field theories. In any CFT containing a scalar primary phi of dimension d we show that crossing symmetry of <phi…

高能物理 - 理论 · 物理学 2011-05-09 David Poland , David Simmons-Duffin

NMR measurements of the electron spin polarization have been performed on a 2D electron system at and around half-filled lowest Landau level. Comparing the magnetic field and the temperature dependence of the spin polarization to models of…

介观与纳米尺度物理 · 物理学 2016-08-16 N. Freytag , M. Horvatić , C. Berthier , M. Shayegan , L. P. Lévy

We study the boundary critical behavior of conformal field theories of interacting fermions in the Gross-Neveu universality class. By a Weyl transformation, the problem can be studied by placing the CFT in an anti de Sitter space…

高能物理 - 理论 · 物理学 2022-07-13 Simone Giombi , Elizabeth Helfenberger , Himanshu Khanchandani

We study the finite-size spectrum of the O($N$) symmetric Wilson-Fisher conformal field theory (CFT) on the $d=2$ spatial-dimension torus using the expansion in $\epsilon=3-d$. This is done by deriving a set of universal effective…

强关联电子 · 物理学 2017-07-26 Seth Whitsitt , Michael Schuler , Louis-Paul Henry , Andreas M. Läuchli , Subir Sachdev