116 citations · 687 across the 30 of their papers we have counts for
31 papers
Generalized Free Fields in de Sitter from 1D CFT
Kanato Goto, Alexey Milekhin, Herman Verlinde +1
We show that a pair of identical large 1D CFTs, like the low-energy limit of the SYK model or a line-defect inside a higher dimensional CFT, contains a natural sub-algebra of o…
All holographic systems have scar states
Alexey Milekhin, Nikolay Sukhov
Scar states are special finite-energy density, but non-thermal states of chaotic Hamiltonians. We argue that all holographic quantum field theories, including super…
Bra-ket wormholes and Casimir entropy
Alexey Milekhin, Amirhossein Tajdini
Bra-ket wormholes are non-trivial saddles in Euclidean gravity. They have to be sustained by negative Casimir energy of matter fields inside the throat. However, Casimir energy is…
Computable Cross Norm in Tensor Networks and Holography
Alexey Milekhin, Pratik Rath, Wayne Weng
The Computable Cross Norm (CCNR) was recently discussed in Ref.~\cite{Yin:2022toc} as a measure of multipartite entanglement in a condensed matter context. In this short note, we p…
Measurement-induced phase transition in teleportation and wormholes
Alexey Milekhin, Fedor K. Popov
We demonstrate that some quantum teleportation protocols exhibit measurement induced phase transitions in Sachdev-Ye-Kitaev model. Namely, Kitaev-Yoshida and Gao-Jafferis-Wall prot…
On minimal residual entropy in non-Fermi liquids
Alexey Milekhin
In the large limit a physical system might acquire a residual entropy at zero temperature even without ground state degeneracy. At the same time poles in the 2-point function m…
Black holes and cryptocurrencies
Alexey Milekhin
It has been proposed in the literature that the volume of Einstein-Rosen bridge is equal to complexity of state preparation ("Complexity=Volume" conjecture). Taking this statement…
Charge fluctuation entropy of Hawking radiation: a replica-free way to find large entropy
Alexey Milekhin, Amirhossein Tajdini
We study the fluctuation entropy for two-dimensional matter systems with an internal symmetry coupled to Jackiw--Teitelboim(JT) gravity joined to a Minkowski region. The fluctuatio…
Coupled Sachdev-Ye-Kitaev models without Schwartzian dominance
Alexey Milekhin
We argue that in certain class of coupled Sachdev-Ye-Kitaev(SYK) models the low energy physics at large N is governed by a non-local action rather than the Schwartzian action. We p…
Non-local reparametrization action in coupled Sachdev-Ye-Kitaev models
Alexey Milekhin
We continue the investigation of coupled Sachdev-Ye-Kitaev(SYK) models without Schwarzian action dominance. Like the original SYK, at large N and low energies these models have an…
Hidden Wave Function of Twisted Bilayer Graphene: Flat Band as a Landau Level
Fedor K. Popov, Alexey Milekhin
We study the chirally symmetric continuum model (CS-CM) of the twisted bilayer graphene. The equation on a flat band could be interpreted as a Dirac equation on a torus in the exte…
Quantum error correction and large
Alexey Milekhin
In recent years quantum error correction(QEC) has become an important part of AdS/CFT. Unfortunately, there are no field-theoretic arguments about why QEC holds in known holographi…
Humanly traversable wormholes
Juan Maldacena, Alexey Milekhin
We point out that there can be humanly traversable wormhole solutions in some previously considered theories for physics beyond the Standard Model, namely the Randall-Sundrum model…
Spontaneous Breaking of Symmetry in Coupled Complex SYK Models
Igor R. Klebanov, Alexey Milekhin, Grigory Tarnopolsky +1
As shown in [1], two copies of the large Majorana SYK model can produce spontaneous breaking of a symmetry when they are coupled by appropriate quartic terms. In this pap…
Universal Constraints on Energy Flow and SYK Thermalization
Ahmed Almheiri, Alexey Milekhin, Brian Swingle
We study the dynamics of a quantum system in thermal equilibrium that is suddenly coupled to a bath at a different temperature, a situation inspired by a particular black hole evap…
SYK wormhole formation in real time
Juan Maldacena, Alexey Milekhin
We study the real time formation of the ground state of two coupled SYK models. This is a highly entangled state which is close to the thermofield double state and can be viewed as…
Traversable wormholes in four dimensions
Juan Maldacena, Alexey Milekhin, Fedor Popov
We present a wormhole solution in four dimensions. It is a solution of an Einstein Maxwell theory plus charged massless fermions. The fermions give rise to a negative Casimir-like…
To gauge or not to gauge?
Juan Maldacena, Alexey Milekhin
The D0 brane, or BFSS, matrix model is a quantum mechanical theory with an interesting gravity dual. We consider a variant of this model where we treat the symmetry as a gl…
Spectra of Eigenstates in Fermionic Tensor Quantum Mechanics
Igor R. Klebanov, Alexey Milekhin, Fedor Popov +1
We study the symmetric quantum mechanics of 3-index Majorana fermions. When the ranks are all equal, this model has a large limit which…
Bands and gaps in Nekrasov partition function
A. Gorsky, A. Milekhin, N. Sopenko
We discuss the effective twisted superpotentials of 2d theories arising upon the reduction of 4d gauge theories on the -deformed cigar-like g…
Spectra of Operators in Large Tensor Models
Ksenia Bulycheva, Igor R. Klebanov, Alexey Milekhin +1
We study the operators in the large tensor models, focusing mostly on the fermionic quantum mechanics with symmetry which may be either global or gauged. In the model…
Surface defects and instanton-vortex interaction
A. Gorsky, B. Le Floch, A. Milekhin +1
We propose a simple formula for the 4d-2d partition function of half-BPS surface defects in gauge theories: $Z^{\text{4d-2d}}=\langle Z^{\text{2d}} \rangle_{\…
On Lagrangian description of Borel resummation
A. Milekhin
In this paper we will propose a physical interpretation of Borel resummation. We will define Borel transformation on the Lagrangian level. This transformation essentially coincides…
CP(N) sigma model on a finite interval revisited
A. Milekhin
In this short note we will revisit the large solution of sigma model on a finite interval of length . We will find a family of boundary conditions for which…