Multivortex states and dynamics in nonequilibrium polariton condensates

Gladilin, V. N.; Wouters, Michiel

doi:10.1088/1751-8121/ab3abc

Cited by 18 publications

(25 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The twodimensional nature of polariton condensates implies that the phase transition between the normal and superfluid state at equilibrium is of the BKT type. Numerical simulations have provided evidence that a similar transition exists out of equilibrium [17,24,28,29], even though studies based on the renormalization group have pointed out that the phase transition is crucially affected at long distances by the Kardar-Parisi-Zhang dynamics of the phase, that tends to destroy the ordered phase [30][31][32][33]. In practice, however, the KPZ physics can be limited to very large system sizes, so that in experimental 2D systems the BKT-like physics dominates [17,24,28,29].…”

mentioning

confidence: 94%

“…Numerical simulations have provided evidence that a similar transition exists out of equilibrium [17,24,28,29], even though studies based on the renormalization group have pointed out that the phase transition is crucially affected at long distances by the Kardar-Parisi-Zhang dynamics of the phase, that tends to destroy the ordered phase [30][31][32][33]. In practice, however, the KPZ physics can be limited to very large system sizes, so that in experimental 2D systems the BKT-like physics dominates [17,24,28,29]. Recently, we have shown by analytical arguments and numerical simulations that also photon condensates without interactions do feature a BKT like phase transition, that is stabilized by the driving and dissipation [34].…”

mentioning

confidence: 94%

“…As a consequence, vortices, even of opposite signs, experience a long-range repulsion [22], that obviously hampers their recombination. This physics was theoretically investigated for excitonpolaritons and indeed it was found that the vortex pair annihilation is strongly affected by the nonequilibrium condition, where it was even observed that very long lived complexes of vortices and antivortices may form under certain conditions [24].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Vortex pair annihilation in arrays of photon cavities

Gladilin,

Wouters

2022

Preprint

Self Cite

View full text Add to dashboard Cite

We investigate theoretically the evolution of the vortex number in an array of photon condensates that is brought from an incoherent low density state to a coherent high density state by a sudden change in the pumping laser intensity. We analyze how the recombination of vortices and antivortices depends on the system parameters such as the coefficients for emission and absorption of photons by the dye molecules, the rate of tunneling between the cavities, the photon loss rate and the number of photons in the condensate. I. INTRODUCTIONVortex excitations of superfluids [1] play a crucial role in a variety of phenomena such as the Berezinskii-Kosterlitz-Thouless (BKT) transition, the Kibble-Zurek (KZ) mechanism, the formation of Abrikosov vortex lattices and the the drag force on objects moving through a superfluid. These phenomena have been experimentally studied on a number of physical platforms such as superconductors, liquid helium and ultracold atoms [2]. What all these systems have in common is that they are up to a very good approximation in (local) thermal equilibrium, a condition that is typically broken in experimental platforms that are based on optical systems [3,4]. Optical Bose-Einstein condensates (BECs) have been experimentally achieved in optical cavities filled with a dye molecule solution and in microcavities where a photon is strongly coupled to an exciton resulting in excitonpolariton [5]. While in the latter system, interactions between exciton-polaritons can lead to stimulated scattering into the ground state, in the photon-dye system it is repeated absorption and reemission of photons [6] that enables a macroscopic occupation of the ground state [7][8][9].Due to photon losses, optical BECs need constant pumping by an excitation laser in order to reach a steady state where pumping balances the losses. Experimentally realized photon condensates are therefore drivendissipative systems. The availability of several other experimental platforms, such as exciton-polaritons [4], superconducting circuits [10] and Rydberg atoms [11], for the study of driven-dissipative systems and their interest for quantum simulation and quantum computation has spurred substantial theoretical activity [4,10,12,13].A typical photon condensation experiment starts from an empty cavity and optical excitations are created by turning on the pumping laser where the phase transition is crossed when the photon density exceeds threshold. Upon crossing the threshold, the system goes from the disordered to the ordered state, which according to the KZ mechanism may lead to the formation of vortex pairs. Vortices in nonequilibrium BECs have been the subject of both experimental [14][15][16][17][18] and theoretical [19][20][21][22] study in exciton-polariton systems, whereas in nonequilibrium photon condensates, vortices have only been studied the-

show abstract

mentioning

confidence: 94%

mentioning

confidence: 94%

mentioning

confidence: 99%

See 1 more Smart Citation

Vortex pair annihilation in arrays of photon cavities

Gladilin,

Wouters

2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…This noiseless evolution gives the advantage of cleaning up the photon phase while it is too short for the unbound vortex-antivortex pairs to recombine. The propensity for their recombination is reduced [14] with respect to the equilibrium case thanks to outgoing radial currents that provide an effective repulsion between vortices and antivortices [15]. If no vortices are present in the final photon field, the system is said to be in the ordered phase; when vortex pairs are present, it is denoted as disordered.…”

mentioning

confidence: 99%

Vortices in Nonequilibrium Photon Condensates

Gladilin

Wouters

2020

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

We present a theoretical study of a Berezinskii-Kosterlitz-Thouless like phase transition in lattices of nonequilibrium photon condensates. Starting from linearized fluctuation theory and the properties of vortices, we propose an analytical formula for the critical point containing four fitting parameters, that captures well all our numerical simulations. We find that the ordered phase becomes more stable when driving and dissipation is increased.

show abstract

“…Consequently, it has been predicted that the steady-state of the system shows a vortex dominated phase, characterized by a nonzero density of repelling vortices with a mean interdistance L v [9,21,24], also observed in the context of the complex Ginzburg-Landau equation [25].…”

mentioning

confidence: 99%

Vortex Dynamics in a Compact Kardar-Parisi-Zhang System

2020

View full text Add to dashboard Cite

We study the dynamics of vortices in a two-dimensional, nonequilibrium system, described by the compact Kardar-Parisi-Zhang equation, after a sudden quench across the critical region. Our exact numerical solution of the phase-ordering kinetics shows that the unique interplay between nonequilibrium and the variable degree of spatial anisotropy leads to different critical regimes. We provide an analytical expression for the vortex evolution, based on scaling arguments, which is in agreement with the numerical results, and confirms the form of the interaction potential between vortices in this system.

show abstract

Multivortex states and dynamics in nonequilibrium polariton condensates

Cited by 18 publications

References 37 publications

Vortex pair annihilation in arrays of photon cavities

Vortex pair annihilation in arrays of photon cavities

Vortices in Nonequilibrium Photon Condensates

Vortex Dynamics in a Compact Kardar-Parisi-Zhang System

Contact Info

Product

Resources

About