Moscow Institute of Physics and Technology

About: Moscow Institute of Physics and Technology is a education organization based out in Dolgoprudnyy, Russia. It is known for research contribution in the topics: Laser & Plasma. The organization has 8594 authors who have published 16968 publications receiving 246551 citations. The organization is also known as: MIPT & Moscow Institute of Physics and Technology (State University).

Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal

Abstract: Citation: Baranov, D. G., Edgar, J. H., Hoffman, T., Bassim, N., & Caldwell, J. D. (2015). Perfect interferenceless absorption at infrared frequencies by a van der Waals crystal. Physical Review B, 92(20), 6. doi:10.1103/PhysRevB.92.201405

IR divergences and kinetic equation in de Sitter space. (Poincare patch; principal series)

Abstract: We explicitly show that the one loop IR correction to the two-point function in de Sitter space scalar QFT does not reduce just to the mass renormalization. The proper interpretation of the loop corrections is via particle creation revealing itself through the generation of the quantum averages $$ \left\langle {a_p^{ + }{a_p}} \right\rangle, \,\left\langle {{a_p}{a_{{ - p}}}} \right\rangle $$ and $$ \left\langle {a_p^{ + }a_{{ - p}}^{ + }} \right\rangle $$ , which slowly change in time. We show that this observation in particular means that loop corrections to correlation functions in de Sitter space can not be obtained via analytical continuation of those calculated on the sphere. We find harmonics for which the particle number $$ \left\langle {a_p^{ + }{a_p}} \right\rangle $$ dominates over the anomalous expectation values $$ \left\langle {{a_p}{a_{{ - p}}}} \right\rangle $$ and $$ \left\langle {a_p^{ + }a_{{ - p}}^{ + }} \right\rangle $$ . For these harmonics the Dyson-Schwinger equation reduces in the IR limit to the kinetic equation. We solve the latter equation, which allows us to sum up all loop leading IR contributions to the Whiteman function. We perform the calculation for the principle series real scalar fields both in expanding and contracting Poincare patches.

The algebraic Bethe ansatz for scalar products in SU(3)-invariant integrable models

Abstract: We study SU(3)-invariant integrable models solvable by nested algebraic Bethe ansatz. We obtain a determinant representation for particular case of scalar products of Bethe vectors. This representation can be used for the calculation of form factors and correlation functions of XXX SU(3)-invariant Heisenberg chain.

Topological edge states of interacting photon pairs emulated in a topolectrical circuit

Abstract: Topological physics opens up a plethora of exciting phenomena allowing to engineer disorder-robust unidirectional flows of light. Recent advances in topological protection of electromagnetic waves suggest that even richer functionalities can be achieved by realizing topological states of quantum light. This area, however, remains largely uncharted due to the number of experimental challenges. Here, we take an alternative route and design a classical structure based on topolectrical circuits which serves as a simulator of a quantum-optical one-dimensional system featuring the topological state of two photons induced by the effective photon-photon interaction. Employing the correspondence between the eigenstates of the original problem and circuit modes, we use the designed simulator to extract the frequencies of bulk and edge two-photon bound states and evaluate the topological invariant directly from the measurements. Furthermore, we perform a reconstruction of the two-photon probability distribution for the topological state associated with one of the circuit eigenmodes. Experimental studies of topological phenomena for interacting quantum systems are challenging. Here, the authors exploit the analogy between a quantum two-body problem in one dimension and a classical two-dimensional problem, emulating two-photon topological bound states in 1D using a 2D electrical circuit.