Recent developments in string compactifications demonstrate obstructions to the simplest constructions of low energy cosmologies with positive vacuum energy. The existence obstacles creating scale-separated de Sitter solutions indicates a UV/IR puzzle for embedding cosmological vacua unitary theory quantum gravity. Motivated by this puzzle, we propose an Friedmann-Lemaître-Robertson-Walker cosmology within theory. Our proposal involves confining 4D gravity on brane which mediates decay from...

We present a general framework in which both Krylov state and operator complexities can be put on the same footing. In our formalism, complexity is defined terms of density matrix associated which, for complexity, lives doubled Hilbert space obtained through channel-state map. This unified definition matrices enables us to extend notion subregion or mixed also naturally mutual complexity. show that this encompasses nicely holographic notions

A bstract In the context of relating AdS/CFT to quantum information theory, we propose a holographic dual Fisher metric for mixed states in boundary field theory. This amounts measure distance between two states. For spherical subregion show that this is related particularly regularized volume enclosed by Ryu-Takayanagi surface. We further argue correction proposed entanglement entropy. discuss consequences connection.

In this paper, we demonstrate how black hole quasinormal modes can emerge from a Dirichlet brickwall model normal modes. We consider probe scalar field in Baños-Teitelboim-Zanelli geometry with and that as the wall approaches event horizon, corresponding poles retarded correlator become dense yield an effective branch cut. The associated discontinuity of carries information further nonvanishing angular momentum nonperturbatively enhances pole condensing. hypothesize it is also related to...

A bstract Constructing an explicit compactification yielding a metastable de Sitter (dS) vacuum in UV consistent string theory is incredibly difficult open problem. Motivated by this issue, as well the conjecture that all non-supersymmetric AdS vacua must decay, we discuss alternative possibility of realizing effective four-dimensional dS cosmology on codimension-one bubble wall separating two 5 vacua. The construction further elaborates scenario arXiv:1807.01570 , where aforementioned...

We establish a relation between entanglement in simple quantum mechanical qubit systems and wormhole physics as considered the context of $\mathrm{AdS}/\mathrm{CFT}$ correspondence. show that both cases, states with same structure, indistinguishable by any local measurement, nevertheless are characterized different Berry phase. This feature is experimentally accessible coupled where phase related unitary transformations. In case, these transformations identified time evolution one two throats.

A bstract For two-dimensional holographic CFTs, we demonstrate the role of Berry phases for relating non-factorization Hilbert space to presence wormholes. The wormholes are characterized by a non-exact symplectic form that gives rise phase. connecting two spacelike regions in gravitational spacetimes, find non-exactness is linked variable appearing phase boundary CFT. This corresponds loop integral bulk. Through this integral, becomes apparent dual entangled CFTs. Furthermore, classify CFTs...

We consider the algebra of simple operators defined in a time band CFT with holographic dual. When is smaller than light crossing AdS, an entire causal diamond center AdS separated from by horizon. show that this obeys version Reeh-Schlieder theorem: action on vacuum can approximate any low energy state arbitrarily well, but no operator within exactly annihilate vacuum. how to relate local excitations complement central band. Local are invisible causality, be related complicated called...

Motivated by the difficulty of constructing de Sitter vacua in string theory, a new approach was proposed arXiv:1807.01570 and arXiv:1907.04268, where four dimensional space realized as effective cosmology, with matter radiation, on an expanding spherical bubble that mediates decay non supersymmetric AdS5 to more stable theory. In this third installment, we further expand scenario considering backreaction bulk brane terms how bends. We compute back reacted metric bent well five bulk. To...

We present an analysis parallel to that of Giusto, Ross, and Saxena (arXiv:0708.3845) construct a discrete family non-supersymmetric microstate geometries the Maldacena-Strominger-Witten system. The supergravity configuration in which we look for smooth microstates is constructed using SO(4, 4) dualities applied appropriate seed solution. approach offers certain technical advantages. Our solutions are five dimensions, as opposed all previously known with AdS3 cores, only six dimensions....

A bstract In this paper we study shells of matter and black holes on the expanding bubbles realizing de Sitter space, that were proposed in [4]. We construct explicit solutions for a rigid shell as well hole like solutions. The latter these can also be used to Randall-Sundrum braneworld four dimensions.

We consider the complexity of a single-sided AdS black hole as modelled by an end-of-the-world brane. In addition, we present multi-boundary partition functions and matter correlation for such setting. compute using modified replica trick corresponding to "quenched geodesic length" in JT gravity. The late-time behaviour shows saturation constant value order $e^{S_0}$ following period linear growth. Furthermore, show that our approach leads improved result variance complexity, namely it being...

A bstract In this work we use the modified replica trick, proposed in arXiv:2205.01150, to compute late time behaviour of complexity for JT gravity with 𝒩 = 1 and 2 supersymmetries. For theory, defined by “quenched geodesic length” obtain expected saturation at $$ t\sim {e}^{S_0} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>t</mml:mi> <mml:mo>~</mml:mo> <mml:msup> <mml:mi>e</mml:mi> <mml:msub> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msub> </mml:msup> </mml:math> , a...

Semiholography has been proposed as an effective nonperturbative framework which can consistently combine perturbative and effects for theories like QCD. It is postulated that the strongly coupled sector a holographic dual in form of classical gravity theory large N limit, fields determine gravitational boundary conditions. In this work, we pursue fundamental derivation particularly showing how physics by itself infrared, also interactions between sectors. We firstly demonstrate two sectors...

In this article we clear up misconceptions concerning the dark bubble model as a realization of energy in string theory. particular point out important differences with Randall-Sundrum, and explain why gravity neither is, nor need be, localized on bubble.

We develop holographic prescriptions for obtaining spectral functions in nonequilibrium states and space-time dependent shifts the energy spin of quasiparticle-like excitations. reproduce strongly coupled versions aspects dynamics Fermi surfaces Landau's Fermi-liquid theory. find that incoming wave boundary condition at horizon does not suffice to obtain a well-defined perturbative expansion observables. Our prescription, based on analysis regularity horizon, allows such be achieved...

Using AdS/CFT prescription, we compute two point Yang-Mills correlator on a constant time slice for the Kasner background. Pushing surface close to initial singularity, find, in some cases, does not develop pole. We further numerically calculate similar where bulk is AdS soliton. find that qualitative behaviour of remains unchanged.

In this paper, we want to emphasize the pivotal role played by strings in model realizing de Sitter using an expanding bubble, proposed and subsequently developed arXiv:1807.01570, arXiv:1907.04268, arXiv:2001.07433. Contrary Randall-Sundrum of brane-localized gravity, use end points radially stretched obtain matter sourcing gravity induced on bubble wall. This allows us reinterpret possible volume divergence coming from naive dimensional reduction as mass renormalization four particle...

We consider thermal Wightman correlators in a relativistic quantum field theory the limit where spatial momenta of insertions become large while their frequencies stay fixed. show that, this limit, size these is bounded by e^{-\beta R} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mrow><mml:mo>−</mml:mo><mml:mi>β</mml:mi><mml:mi>R</mml:mi></mml:mrow></mml:msup></mml:math> , R display="inline"><mml:mi>R</mml:mi></mml:math> radius...

A bstract We present the holographic construction of dark bubble model energy and highlight pivotal role played by non-normalizable modes. Following route renormalization, we show that modes are essential for having a vanishing mass induced graviton in any braneworld model. then apply this idea computation propagator on wall introduced [1].

We develop a new method for computing the holographic retarded propagator in generic (non-)equilibrium states using state/geometry map. check that our reproduces thermal spectral function given by Son-Starinets prescription. The time-dependence of relevant scalar operator is studied class non-equilibrium states. latter are represented AdS-Vaidya geometries with an arbitrary parameter characterising timescale dual state to transit from initial equilibrium another due homogeneous quench. For...

A bstract In the framework of AdS 3 / CFT 2 correspondence, we present a systematic analysis late time thermalization two dimensional state created by insertion small number heavy operators on vacuum. We show that at Lorentzian time, universal features this are solely captured eigenvalues monodromy matrix corresponding to solutions uniformization equation. discuss different ways extract while bypassing need for finding explicitly full - first, using preserving diffeomorphism and second...

In this essay, we will take a wonderful ride on dark bubble with strings attached, which carries our universe out of the swampland and makes it realizable in landscape string theory. To find way to landscape, make use apparently hostile corners their instabilities.

We study the thermodynamics and phase structures of Reissner-Nordstrom Born-Infeld black holes in AdS space by constructing ``off-shell'' free energies using thermodynamic quantities derived directly from action. then use these results to propose effective potentials for respective boundary gauge theories. The saddle points describe all equilibrium phases

We consider general black hole solutions in five-dimensional spacetime the presence of a negative cosmological constant.We obtain evolution via gravity/gauge theory duality (holography) by defining appropriate boundary conditions on four-dimensional hypersurface.The standard counterterms are shown to renormalize bare parameters system (the Newton's constant and constant).We discuss thermodynamics present various examples.The braneworld scenarios be special cases our holographic construction.