Logic gates with bright dissipative polariton solitons in Bragg cavity systems

Cancellieri, E.; Chana, J. K.; Sich, M.; Krizhanovskii, D. N.; Skolnick, M. S.; Whittaker, D. M.

doi:10.1103/physrevb.92.174528

Cited by 18 publications

(11 citation statements)

References 26 publications

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“…The latter feature suggests their implementation as a mediating state for an adiabatic switch between the two stationary edge-state solutions, which can be achieved by slowly increasing and decreasing the intensity of the pump, thus opening up new ways to design optical devices [41,42]. The symmetry-protected power-oscillating states furthermore display a well-structured, symmetric frequency-comb spectrum that can be tuned by varying the pump or interaction strength.…”

Section: Discussionmentioning

confidence: 99%

PC -symmetry-protected edge states in interacting driven-dissipative bosonic systems

Cancellieri

Schomerus

2019

Phys. Rev. A

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A main objective of topological photonics is the design of disorder-resilient optical devices. Many prospective applications would benefit from nonlinear effects, which not only are naturally present in real systems but also are needed for switching in computational processes, while the underlying particle interactions are a key ingredient for the manifestation of genuine quantum effects. A particularly attractive switching mechanism of dynamical systems are infinite-period bifurcations into limit cycles, as these set on with a finite amplitude. Here we describe how to realize this switching mechanism by combining attractive and repulsive particle interactions in a driven-dissipative Su-Schrieffer-Heeger model, such as realized in excitonic lasers and condensates so that the system displays a nonhermitian combination of parity and charge-conjugation (PC) symmetry. We show that this symmetry survives in the nonlinear case and induces infinite-period and limit-cycle bifurcations (distinct from a Hopf bifurcation) where the system switches from a symmetry-breaking stationary state into a symmetry-protected power-oscillating state of finite amplitude. These protected dynamical solutions display a number of characteristic features, among which are their finite amplitude at onset, their arbitrary long oscillation period close to threshold, and the symmetry of their frequency spectrum which provides a tuneable frequency comb. Phases with different transition scenarios are separated by exceptional points in the stability spectrum, involving nonhermitian degeneracies of symmetry-protected excitations.

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Section: Discussionmentioning

confidence: 99%

PC -symmetry-protected edge states in interacting driven-dissipative bosonic systems

Cancellieri

Schomerus

2019

Phys. Rev. A

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“…To determine whether coherent polariton-polariton and polariton-exciton interactions alone can explain the observed experimental results or other incoherent processes should be considered we performed theoretical studies, where we took into account only coherent interparticle interactions. We model the open cavity system with a generalized Gross-Pitaevskii equation 32,33 (GP) for coupled cavity exciton fields (ψ C and ψ X ) and include the effect of decay and resonant pumping (h = 1):…”

Section: Yields the Ratio Between The Groundmentioning

confidence: 99%

Formation of a macroscopically occupied polariton state in a tunable open-access microcavity under resonant excitation

Giriunas

Sich

et al. 2018

Journal of Applied Physics

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We experimentally demonstrate the formation of a macroscopically occupied state (condensation) of excitonpolaritons in a tunable 3D open-access microcavity system under resonant excitation. We observe a high conversion efficiency of polaritons from the pumped state to the ground mode, leading to population of the condensate 1.5 times greater than that of the driven state for a total number of polaritons of ∼110. Comparative numerical simulations show that coherent polariton-polariton scattering mechanisms alone cannot explain the observed experimental results and that other relaxation channels play an important role.

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“…First of all the devices can be implemented in the framework of the soliton-soliton interactions. Particularly, the AND and OR logic gates based on the selfinteractions of bright dissipative polariton solitons have theoretically been demonstrated in [48]. On the other hand, the interactions of dissipative solitons can explicitly be controlled by the externally applied influence.…”

Section: Introductionmentioning

confidence: 99%

Logic gates on stationary dissipative solitons

et al. 2019

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Stable dissipative solitons are perfect carries of optical information due to remarkable stability of their waveforms that allows the signal transmission with extremely dense soliton packing without loosing the encoded information. Apart of unaffected passing of solitons through a communication network, controllable transformations of soliton waveforms are needed to perform all-optical information processing. In this paper we employ the basic model of dissipative optical solitons in the form of the complex Ginzburg-Landau equation with a potential term to study the interactions between two stationary dissipative solitons being under the control influences and use those interactions to implement various logic gates. Particularly, we demonstrate NOT, AND, NAND, OR, NOR, XOR, and XNOR gates, where the plain (fundamental soliton) and composite pulses are used to represent the low and high logic levels.

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Logic gates with bright dissipative polariton solitons in Bragg cavity systems

Cited by 18 publications

References 26 publications

PC -symmetry-protected edge states in interacting driven-dissipative bosonic systems

PC -symmetry-protected edge states in interacting driven-dissipative bosonic systems

Formation of a macroscopically occupied polariton state in a tunable open-access microcavity under resonant excitation

Logic gates on stationary dissipative solitons

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