Engineering Photon-Photon Interactions within Rubidium-Filled Waveguides

Perrella, Christopher; Light, P.S.; Vahid, S. Afshar; Benabid, Fetah; Luiten, André

doi:10.1103/physrevapplied.9.044001

Cited by 10 publications

(4 citation statements)

References 50 publications

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“…The PCW itself can be realised with a SiO alligator waveguide [32,33] with high tunability over the allowed modes and loss processes. Previous experiments with cold atoms in waveguides have used Caesium, but it should be possible to engineer a waveguide suitable for Rubidium [37]. When studying the bound states, one has to be careful not to violate the Markovian approximation.…”

Section: Discussionmentioning

confidence: 99%

Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Parmee

Cooper

2019

Phys. Rev. A

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Chains of coupled two-level atoms behave as 1D quantum spin systems, exhibiting free magnons and magnon bound states. While these excitations are well studied for closed systems, little consideration has been given to how they are altered by the presence of an environment. This will be especially important in systems that exhibit nonlocal dissipation, e.g. systems in which the magnons decay due to optical emission. In this work, we consider free magnon excitations and two-magnon bound states in an XXZ chain with nonlocal dissipation. We prove that whilst the energy of the bound state can lie outside the two-magnon continuum of energies, the decay rate of the bound state has to always lie within the two-magnon continuum of decay rates. We then derive analytically the bound state solutions for a system with nearest-neighbour and next-nearest-neighbour XY interaction and nonlocal dissipation, finding that the inclusion of nonlocal dissipation allows more freedom in engineering the energy and decay rate dispersions for the bound states. Finally, we numerically study a model of an experimental set-up that should allow the realisation of dissipative bound states by using Rydberg-dressed atoms coupled to a photonic crystal waveguide (PCW). We demonstrate that this model can exhibit many key features of our simpler models.

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Section: Discussionmentioning

confidence: 99%

Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Parmee

Cooper

2019

Phys. Rev. A

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“…We first consider a feasible scheme of cross-phase modulation, aiming to apply for generating PSPs: Atomic vapor filled in hollow-core photonic crystal fiber (HC-PCF) is an efficient platform for photon-level quantum processors [22,23,[31][32][33][34][35] such as cross-phase modulation [22,23], all-optical switches [31,32], and quantum memories [34].…”

Section: A Generation Schemementioning

confidence: 99%

“…We have also presented a scheme to generate PSPs by employing, although not limited to, atomic vapor in HC-PCF [22,23,[31][32][33][34][35], which enables cross-phase modulation at room temperature with a fast response time. Despite recent progress in cross-phase modulation techniques in various systems [42][43][44][45][46][47][48], they were mostly aimed at implementing quantum non-destructive measurements [49] or two-qubit gate operations [50,51], which are still demanding due to the requirement of either a strong nonlinearity or additional schemes with precise controls [52].…”

Section: Remarksmentioning

confidence: 99%

Single-photon characteristics of superposed weak coherent states

Lee

Kim

2019

Phys. Rev. A

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We study a superposed weak coherent state that can fundamentally mimic an ideal single photon not only with respect to the number of photons but also in terms of an indeterminate phase. It is close to the single-photon state with almost unit fidelity as well as exhibits fundamental features of single photons such as antibunching and Hong-Ou-Mandel interference. The emergence and vanishing of single-photon characteristics can be directly observed by changing two parameters, i.e., mean photon number and number of phases. Our result shows that the uncertainty between photon number and phase indeed constitutes the characteristics of single photons. Finally, we apply the superposed weak coherent state to quantum key distribution and demonstrate that it outperforms the typical approach using phase-randomized weak coherent states.

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“…Atoms have been trapped in all-optical traps acting as optical tweezers and in optical lattices [22], which opened the door for cold atoms as a highly controllable model for other physical systems and to perform quantum simulations [23]. Atoms trapped in hollowcore optical fibre waveguide trap can create effective photon-photon interactions [24,25]. For even smaller traps for cold atoms, nanophotonic structures are used.…”

Section: Cold Atoms and Hot Atomic Vapoursmentioning

confidence: 99%

Non-linear optical effects in cold and hot rubidium gases

Lange¹,

Johannes²

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The front cover shows a microscope image of a bridge waveguide, with tapered launchpads at each side. The launchpads contain the surface grating couplers designed in chapter 2 of this thesis. The freestanding, 200 nm wide and 100 µm long bridge was fabricated using e-beam lithography in a 220 nm thin silicon nitride membrane by Andries Lof at the Amolf Nanolab Amsterdam. The image is taken in the Fourier microscope setup shown in figure 2.5, with white light illumination using an LED. The back cover shows an image of the same bridge waveguide, which is mirrored to represent the bottom view of the sample. It is best viewed by holding the thesis face up and lifting it over your head to investigate the 'sample' from underneath. For this image, the bottom launchpad is illuminated with laserlight with a wavelength of 780 nm under an angle of 3 • from normal incidence. The light is coupled into the membrane and funneled into the waveguide bridge. A bright spot is visible at the waveguide bridge entrance due to enhanced scattering. The light then travels through the bridge and is coupled out at the top launchpad. The image demonstrates that light can be coupled into the nanophotonic waveguide bridge using surface grating couplers under near-normal incidence.

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Engineering Photon-Photon Interactions within Rubidium-Filled Waveguides

Abstract: Engineering photon-photon interactions within rubidium-filled waveguides

Cited by 10 publications

References 50 publications

Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Single-photon characteristics of superposed weak coherent states

Non-linear optical effects in cold and hot rubidium gases

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