Polariton condensates for classical and quantum computing

Kavokin, A. V.; Liew, T.; Schneider, Christian; Lagoudakis, Pavlos G.; Klembt, Sebastian; Hoefling, Sven

doi:10.1038/s42254-022-00447-1

Cited by 95 publications

(52 citation statements)

References 239 publications

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“…Furthermore, having distillable quantum entangled states available in the ground state of molecular polaritonic systems, may also be of interest for the design of robust entangled states suitable for quantum computing. 27,29,63 Note also that the discovered heating of the subsystem temperatures due to strong lightmatter interaction, effectively prevents the sub-systems from reaching 0 K, despite approaching the hybridised groundstate of the total system at 0 K. This effect should potentially be considered, for the interpretation of experimental results in the ultra low cryogenic regime, e.g. for cavity mediated superconductors.…”

Section: Discussion Conclusion and Outlookmentioning

confidence: 99%

Exact Solution for A Real Polaritonic System Under Vibrational Strong Coupling in Thermodynamic Equilibrium: Absence of Zero Temperature and Loss of Light-Matter Entanglement

Sidler¹,

Ruggenthaler²,

Rubio³

2022

Preprint

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Section: Discussion Conclusion and Outlookmentioning

confidence: 99%

Exact Solution for A Real Polaritonic System Under Vibrational Strong Coupling in Thermodynamic Equilibrium: Absence of Zero Temperature and Loss of Light-Matter Entanglement

Sidler¹,

Ruggenthaler²,

Rubio³

2022

Preprint

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“…Exciton polariton condensates possess many attractive features for quantum computing and quantum communication: they may operate under room temperature, they demonstrate high dynamical speed, they are easy to probe, and finally, they are flexible for different fabrication techniques (Ghosh, Liew, 2020;Moxley, et al, 2021, Kavokin, et al, 2022.…”

Section: Applications Of Polariton Becmentioning

confidence: 99%

Eksiton Polariton Yoğunlaşmasında Amplifikasyon Üzerinde Kontrol

Borisenok

2022

EJOSAT

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Exciton polariton condensates are the most well-studied case of Bose-Einstein condensation (BEC) of quasiparticles. Together with their prominent fundamental importance, the exciton-polariton condensates have a wide spectrum of engineering applications covering interferometry and metrology, different types of SQUIDs and accelerometers, and forming a universal gate set for quantum computing via the control with external laser pulses. The efficient experimental manipulation with the polariton BEC can be realized via the bosonic final-state stimulation, matter-wave amplification, or by lasing of polaritons, but a satisfactory theoretical model for such control has not been developed yet. Here we study the polariton matter-wave amplifier based on the stimulated scattering of massive particles. The amplification of the injected quasiparticles is achieved through an elastic scattering of so-called lower polaritons (LPs). Such an amplifier has many advantages compared with a standard lasing or using a photon amplifier: it can provide a sufficient gain coefficient. To develop an efficient control algorithm for the polariton amplifier we use here the dynamical model for the LP population proposed by Ciuti, Savona, et al. in 1998. The phenomenological model for the gain coefficient is based on the experiments with cold collisions of polaritons performed by Deng, Haug, and Yamamoto in 2010 and later. We use different feedback algorithms (speed gradient vs target attractor) to track efficiently the polariton population in the amplifier. We compare the pros and cons of our alternative approaches and discuss their possible engineering applications.

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“…We predict formation of double concentric ring polariton vortices and confirm our predictions by experimental observations. We note that double ring polariton condensates may be used as building blocks in polariton quantum networks [14].…”

Section: Introductionmentioning

confidence: 99%

Double ring polariton condensates with polariton vortices

Sedov¹,

Lukoshkin²,

Kalevich³

et al. 2022

Nanosystems: Phys. Chem. Math.

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We study formation of persistent currents of exciton polaritons in annular polariton condensates in a cylindrical micropillar cavity under the spatially localised nonresonant optical pumping. Since polariton condensates are strongly nonequilibrium systems, the trapping potential for polaritons, formed by the pillar edge and the reservoir of optically induced incoherent excitons, is not real in general case. Its imaginary part includes the spatially distributed gain from the pump and losses of polaritons in the condensate. We show that engineering the gain-loss balance in the micropillar plane gives one an access to the excited states of the polariton condensate. We demonstrate, both theoretically and experimentally, the formation of vortices in double concentric ring polariton condensates in the case of complex annular trap potential. KEYWORDS polariton, exciton-polariton condensate, persisten current, micropillar, vortex.

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Polariton condensates for classical and quantum computing

Cited by 95 publications

References 239 publications

Exact Solution for A Real Polaritonic System Under Vibrational Strong Coupling in Thermodynamic Equilibrium: Absence of Zero Temperature and Loss of Light-Matter Entanglement

Exact Solution for A Real Polaritonic System Under Vibrational Strong Coupling in Thermodynamic Equilibrium: Absence of Zero Temperature and Loss of Light-Matter Entanglement

Eksiton Polariton Yoğunlaşmasında Amplifikasyon Üzerinde Kontrol

Double ring polariton condensates with polariton vortices

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