Sergey Alyatkin
YOU?
Author Swipe
View article: Quantum fluids of light in 2D artificial reconfigurable aperiodic crystals with tailored coupling
Quantum fluids of light in 2D artificial reconfigurable aperiodic crystals with tailored coupling Open
Aperiodic crystals are the intermediates between strictly periodic crystalline matter and amorphous solids. The lack of translational symmetry combined with intrinsic long-range order endows aperiodic crystals with unique physical characte…
View article: Tailoring the resonant spin response of a stirred polariton condensate
Tailoring the resonant spin response of a stirred polariton condensate Open
We report on the enhancement of the spin coherence time (T2) by almost an order-of-magnitude in exciton-polariton condensates through driven spin precession resonance. Using a rotating optical trap formed by a bichromatic laser excitation,…
View article: Observation of Light Localization at the Edges of Quasicrystal Waveguide Arrays
Observation of Light Localization at the Edges of Quasicrystal Waveguide Arrays Open
Quasicrystals are unique systems that, unlike periodic structures, lack translational symmetry but exhibit long-range order dramatically enriching the system properties. While evolution of light in the bulk of photonic quasicrystals is wel…
View article: Quantum Fluids of Light in 2D Artificial Reconfigurable Aperiodic Crystals with Tailored Coupling
Quantum Fluids of Light in 2D Artificial Reconfigurable Aperiodic Crystals with Tailored Coupling Open
Aperiodic crystals are the intermediates between strictly periodic crystalline matter and amorphous solids. The lack of translational symmetry combined with intrinsic long-range order endows aperiodic crystals with unique physical characte…
View article: Antiferromagnetic Ising model in a triangular vortex lattice of quantum fluids of light
Antiferromagnetic Ising model in a triangular vortex lattice of quantum fluids of light Open
Vortices are topologically distinctive objects appearing as phase twists in coherent fields of optical beams and Bose-Einstein condensates. Structured networks and artificial lattices of coupled vortices could offer a powerful platform to …
View article: Observation of spin precession resonance in a stirred quantum fluid of light
Observation of spin precession resonance in a stirred quantum fluid of light Open
External driving of spins by magnetic or optical fields in different systems underpins numerous applications ranging from magnetic resonance imaging to coherent state control in quantum computing. Here, we reveal the effect of an all-optic…
View article: Vortex clusters in a stirred polariton condensate
Vortex clusters in a stirred polariton condensate Open
The response of superfluids to the external rotation, evidenced by emergence of quantised vortices, distinguishes them from conventional fluids. In this work, we demonstrate that the number of vortices in a stirred polariton condensate dep…
View article: Optically driven spin precession in polariton condensates
Optically driven spin precession in polariton condensates Open
External driving of spinor degrees of freedom by magnetic or optical fields in quantum systems underpin many applications ranging from nuclear magnetic resonance to coherent state control in quantum computing. Although spinor polariton con…
View article: Quantum vortex formation in the “rotating bucket” experiment with polariton condensates
Quantum vortex formation in the “rotating bucket” experiment with polariton condensates Open
The appearance of quantized vortices in the classical “rotating bucket” experiments of liquid helium and ultracold dilute gases provides the means for fundamental and comparative studies of different superfluids. Here, we realize the rotat…
View article: Quantum Vortex Formation in the "Rotating Bucket'' Experiment with Polariton Condensates
Quantum Vortex Formation in the "Rotating Bucket'' Experiment with Polariton Condensates Open
The appearance of quantised vortices in the classical ``rotating bucket'' experiments of liquid helium and ultracold dilute gases provides the means for fundamental and comparative studies of different superfluids. Here, we realize the ``r…
View article: Antiferromagnetic Ising model in a triangular vortex lattice of quantum fluids of light
Antiferromagnetic Ising model in a triangular vortex lattice of quantum fluids of light Open
Vortices are topologically distinctive objects appearing as phase twists in coherent fields of optical beams and Bose-Einstein condensates. Structured networks and artificial lattices of coupled vortices could offer a powerful platform to …
View article: Spontaneous Formation of Time-Periodic Vortex Cluster in Nonlinear Fluids of Light
Spontaneous Formation of Time-Periodic Vortex Cluster in Nonlinear Fluids of Light Open
We demonstrate spontaneous formation of a nonlinear vortex cluster state in a microcavity exciton-polariton condensate with time-periodic sign flipping of its topological charges at the GHz scale. When optically pumped with a ring-shaped n…
View article: Solving the Max-3-Cut Problem with Coherent Networks
Solving the Max-3-Cut Problem with Coherent Networks Open
Many computational problems are intractable through classical computing and, as Moore’s law is drawing to a halt, demand for finding alternative methods in tackling these problems is growing. Here, we realize a liquid light machine for the…
View article: Spontaneous formation of time-periodic vortex crystals in nonlinear fluids of light
Spontaneous formation of time-periodic vortex crystals in nonlinear fluids of light Open
We demonstrate spontaneous formation of a nonlinear vortex crystal state in a microcavity exciton-polariton condensate with time-periodic sign flipping of its topological charges at the GHz scale. When optically pumped with a ring-shaped n…
View article: Quantum fluids of light in all-optical scatterer lattices
Quantum fluids of light in all-optical scatterer lattices Open
One of the recently established paradigms in condensed matter physics is examining a system’s behaviour in artificial potentials, giving insight into phenomena of quantum fluids in hard-to-reach settings. A prominent example is the matter-…
View article: Data for Quantum fluids of light in all-optical scatterer lattices
Data for Quantum fluids of light in all-optical scatterer lattices Open
Experimental data and numerical simulation results used to create the figures in the paper Alyatkin, S., Sigurdsson, H., Askitopoulos, A., Töpfer, J.D., & Lagoudakis, P.G. (2021) Quantum fluids of light in all-optical scatterer lattices. N…
View article: Direct measurement of carbon nanotube temperature between fiber ferrules as a universal tool for saturable absorber stability investigation
Direct measurement of carbon nanotube temperature between fiber ferrules as a universal tool for saturable absorber stability investigation Open
View article: Geometric frustration in polygons of polariton condensates creating vortices of varying topological charge.
Geometric frustration in polygons of polariton condensates creating vortices of varying topological charge. Open
View article: Lotka-Volterra population dynamics in coherent and tunable oscillators of trapped polariton condensates
Lotka-Volterra population dynamics in coherent and tunable oscillators of trapped polariton condensates Open
We demonstrate a regime in which matter-wave condensates of exciton-polaritons trapped in an elliptically shaped two-dimensional potential appear as a coherent mixture of ground and first-excited state of the quantum harmonic oscillator. T…
View article: Simulating the spectral gap with polariton graphs
Simulating the spectral gap with polariton graphs Open
Polariton graphs were recently proposed and validated as a novel platform for solving hard optimization problems that can be mapped into the Ising or
XY models. Here, we elucidate a relationship between the energy spectrum of the
XY models. Here, we elucidate a relationship between the energy spectrum of the
View article: Interaction induced point scatterer lattices and flat band condensation of exciton-polaritons
Interaction induced point scatterer lattices and flat band condensation of exciton-polaritons Open
One of the recently established paradigms in the study of condensed matter physics is examining a system's behaviour in artificially constructed potentials. This allows one to obtain insight on a range of physical phenomena which may requi…
View article: Coherence Revivals of a Spinor Polariton Condensate from Self-induced\n Larmor Precession
Coherence Revivals of a Spinor Polariton Condensate from Self-induced\n Larmor Precession Open
First order coherence measurements of a polariton condensate, reveal a regime\nwhere the condensate pseudo-spin precesses persistently within the driving\noptical pulse. Within a single 20 $\\mu$s optical pulse the condensate\npseudo-spin …
View article: Coherence Revivals of a Spinor Polariton Condensate from Self-induced Larmor Precession
Coherence Revivals of a Spinor Polariton Condensate from Self-induced Larmor Precession Open
First order coherence measurements of a polariton condensate, reveal a regime where the condensate pseudo-spin precesses persistently within the driving optical pulse. Within a single 20 $μ$s optical pulse the condensate pseudo-spin perfor…
View article: Optical Control of Couplings in Polariton Condensate Lattices
Optical Control of Couplings in Polariton Condensate Lattices Open
We demonstrate deterministic control of the nearest and next-nearest neighbor coupling in the unit cell of a square lattice of microcavity exciton-polariton condensates. We tune the coupling in a continuous and reversible manner by optical…
View article: Data for Optical Control of Couplings in Polariton Condensate Lattices
Data for Optical Control of Couplings in Polariton Condensate Lattices Open
Experimental data and numerical simulation results used to create the figures in the paper Alyatkin, S., Töpfer, J.D., Askitopoulos, A., Sigurdsson, H. & Lagoudakis, P.G. (2020). Optical Control of Couplings in Polariton Condensate Lattice…
View article: Giant increase of temporal coherence in optically trapped polariton condensate
Giant increase of temporal coherence in optically trapped polariton condensate Open
Coherent bosonic ensembles offer the promise of harnessing quantum effects in photonic and quantum circuits. In the dynamic equilibrium regime, the application of polariton condensates is hindered by exciton-polariton scattering induced de…
View article: Phase-matched third-harmonic generation via doubly resonant optical surface modes in 1D photonic crystals
Phase-matched third-harmonic generation via doubly resonant optical surface modes in 1D photonic crystals Open