Unconditional generation of bright coherent non-Gaussian light from exciton-polariton condensates

Byrnes, Tim; Yamamoto, Yoshihisa; Loock, Peter van

doi:10.1103/physrevb.87.201301

Cited by 10 publications

(16 citation statements)

References 50 publications

(55 reference statements)

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“…[41] in several ways. First, the pumping mechanism for producing the polaritons is simplified by considering direct coherent excitation of the polariton condensate.…”

Section: Discussionmentioning

confidence: 99%

“…As discussed in Ref. [41], a Kerr nonlinear medium will produce Wigner negativities transiently, but it is much more difficult to achieve this at steadystate due to phase diffusion effects from the cavity. As we show in this paper, the feedback acts to stabilize this, and gives the capability to produce light with negative Wigner function characteristics at steady-state.…”

Section: Proposed Experimental Systemmentioning

confidence: 99%

“…[41]. First, while in our previous work offresonant pumping was used to pump the system, which provided the population of hot polaritons for the polariton condensate, we show that resonant pumping of the condensate directly is feasible.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [41] we used a particular master equation that was specific to exciton-polaritons, but as we show in this paper, the stabilization of negative Wigner function light is possible with any non-linear medium in a cavity when combined with feedback.…”

Section: Introductionmentioning

confidence: 99%

“…This, and the potential room-temperature operation, makes the devices attractive as a potential way of generating coherent non-Gaussian light. Previously we introduced a method based on excitonpolariton BECs to generate bright, steady-state nonGaussian light [41]. In the scheme, a pump laser produces a hot gas of exciton-polaritons, which condenses into the zero momentum state due to polariton-polariton scattering.…”

Section: Introductionmentioning

confidence: 99%

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Steady-state generation of negative-Wigner-function light using feedback

Joana¹,

Loock²,

Deng³

et al. 2016

Phys. Rev. A

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We propose a method of producing steady-state coherent light with negative Wigner functions in nonlinear media combined with feedback control. While the nonlinearities are essential to produce the Wigner negativities, this alone is insufficient to stabilize steady-state light with negativities. Using feedback control to control the phase in the cavity we find that this produces significant total negativities for reasonable experimental parameters. The negative Wigner function is produced continuously and does not appear to be restricted to low amplitude light. The technique is applicable to systems such as exciton-polaritons, where strong natural nonlinearities are present.

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“…[41] in several ways. First, the pumping mechanism for producing the polaritons is simplified by considering direct coherent excitation of the polariton condensate.…”

Section: Discussionmentioning

confidence: 99%

Section: Proposed Experimental Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Steady-state generation of negative-Wigner-function light using feedback

Joana¹,

Loock²,

Deng³

et al. 2016

Phys. Rev. A

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Exciton–polariton condensates

2014

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Recently a new type of system exhibiting spontaneous coherence has emerged-the exciton-polariton condensate. Excitonpolaritons (or polaritons for short) are bosonic quasiparticles that exist inside semiconductor microcavities, consisting of a superposition of an exciton and a cavity photon. Above a threshold density the polaritons macroscopically occupy the same quantum state, forming a condensate. The polaritons have a lifetime that is typically comparable to or shorter than thermalization times, giving them an inherently non-equilibrium nature. Nevertheless, they exhibit many of the features that would be expected of equilibrium Bose-Einstein condensates (BECs). The non-equilibrium nature of the system raises fundamental questions as to what it means for a system to be a BEC, and introduces new physics beyond that seen in other macroscopically coherent systems. In this review we focus on several physical phenomena exhibited by exciton-polariton condensates. In particular, we examine topics such as the di erence between a polariton BEC, a polariton laser and a photon laser, as well as physical phenomena such as superfluidity, vortex formation, and Berezinskii-Kosterlitz-Thouless and BardeenCooper-Schrie er physics. We also discuss the physics and applications of engineered polariton structures.S pontaneous coherence is a phenomenon that has fascinated physicists from a wide range of fields, ranging from condensed matter physics, atomic physics and quantum optics, to highenergy physics. Lasing is perhaps the most ubiquitous phenomenon giving rise to macroscopic coherence, in this case formed by stimulated emission of photons 1 . Bose-Einstein condensation (BEC) is another example of collective coherence of many particles, such that above a critical density (or equivalently below a critical temperature), the particles spontaneously occupy the ground state 2 . Superfluid 4 He is the earliest realization of BEC, in the presence of strong interactions 3 . Superconductivity, viewed as a condensation of Cooper pairs, allows a charged version of BEC yielding resistanceless (superfluid) flow 4 . The aspect that is common to these phenomena is that a large number of particles initially possessing no phase relation all become coherent once a system parameter, such as temperature or density, crosses a threshold. In this review, we examine a new system that undergoes spontaneous coherence: the exciton-polariton condensate. The recent observation of excitonpolariton condensation 5-7 adds another particle to the list for which BEC has been observed-cold atoms 8,9 , magnons 10,11 , and more recently photons 12 . We shall see that rather than being simply another type of particle that undergoes BEC, it possesses characteristics that incorporate new physics owing to its intrinsically non-equilibrium nature.One of the distinctive features of exciton-polaritons (or simply polaritons for short) is their exceedingly light effective mass, typically of the order of 10 −4 times the bare electron mass. For an ideal (non-interacting and a...

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Controllable phase-dependent Wigner-function negativity at steady state via parametric driving and feedback

Ding

2021

Journal of Applied Physics

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Generating the negative Wigner functions where the corresponding Wigner states are nonclassical has been recognized as a powerful tool for successfully performing quantum information and computing protocols beyond the scope of classical computers. Here, we present the possibility to generate and engineer the negative Wigner function at a steady state using parametric (two-photon) driving and homodyne-based feedback in a quantum van der Pol (vdP) oscillator. Specifically, we employ a quantum master equation approach for calculating the Wigner function of the vdP oscillator field in phase space and, furthermore, quantifying its negativity content. We clearly show that the negative-value magnitudes, regions, and shapes of the Wigner function can be effectively tuned by the parametric driving phase and the parametric driving amplitude, as well as the feedback coefficient within a large range. We identify different contributions of these involved parameters to the Wigner-function negativity. In the present scheme, more complex quantum coherence and interference phenomena are introduced via the parametric driving and feedback, which stabilizes the phase of the vdP oscillator field and renders the capability to generate the negative Wigner function. Therefore, the enhanced Wigner-function negativity can be achieved under these optimized system parameters. Our in-depth study provides insight into the formation and in situ control of the desirable Wigner nonclassical states. The obtained results are not limited to the vdP oscillator systems and should be generally applicable to other coherent coupled systems within the reach of modern experimental facilities.

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Unconditional generation of bright coherent non-Gaussian light from exciton-polariton condensates

Cited by 10 publications

References 50 publications

Steady-state generation of negative-Wigner-function light using feedback

Steady-state generation of negative-Wigner-function light using feedback

Exciton–polariton condensates

Controllable phase-dependent Wigner-function negativity at steady state via parametric driving and feedback

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