Short and robust directional couplers designed by shortcuts to adiabaticity

Tseng, Shuo Yen; Wen, Rui; Chiu, Ying Feng; Chen, Xi

doi:10.1364/oe.22.018849

Cited by 56 publications

(75 citation statements)

References 21 publications

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“…Chen and Muga, 2012a; Kiely and Ruschhaupt, 2014) and four-level systems (Güngördü et al, 2012;Herrera et al, 2014;Kiely et al, 2016), or Hamiltonians quadratic in creation and annihilation operators (Stefanatos and Paspalakis, 2018a). They are also very useful to design motional dynamics in harmonic traps or otherwise.…”

Section: ;mentioning

confidence: 99%

“…Such a hybrid strategy has been explicitly worked out to engineer spin like systems (Hegerfeldt, 2013;Sun et al, 2017;Zhou et al, 2017a), to minimize final excitation after a fast transport in the presence of anharmonicities , to ensure fast transport with extra relevant constraints (e.g. minimum transient energy, bounded trap velocity, or bounded distance from the trap center) Amri et al, 2018;Chen et al, 2011b;Stefanatos and Li, 2014;, to ensure a fast and robust shuttling of an ion with noise (Lu et al, 2014d), to perform fast expansions (Boldt et al, 2016;Lu et al, 2014c;Plata et al, 2019;Salamon et al, 2009;Stefanatos, 2013Stefanatos, , 2017bStefanatos et al, 2010), or to drive a many-body Lipkin-Meshkov-Glick system (Campbell et al, 2015).…”

Section: G Optimal Control and Shortcuts To Adiabaticitymentioning

confidence: 99%

“…Since a slow, adiabatic operation avoids excitations but it takes an impractical long time, cranes are a natural domain for STA (González-Resines et al, 2017). Crane control is an important engineering field, see Kuo and Kang (2014) and Sun et al (2012) and references therein. Methods and ideas abound and many can be translated or adapted to other STA-driven processes in very different systems.…”

Section: Cranesmentioning

confidence: 99%

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Shortcuts to adiabaticity: Concepts, methods, and applications

et al. 2019

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Shortcuts to adiabaticity (STA) are fast routes to the final results of slow, adiabatic changes of the controlling parameters of a system. The shortcuts are designed by a set of analytical and numerical methods suitable for different systems and conditions. A motivation to apply STA methods to quantum systems is to manipulate them on timescales shorter than decoherence times. Thus shortcuts to adiabaticity have become instrumental in preparing and driving internal and motional states in atomic, molecular, and solid-state physics. Applications range from information transfer and processing based on gates or analog paradigms, to interferometry and metrology. The multiplicity of STA paths for the controlling parameters may be used to enhance robustness versus noise and perturbations, or to optimize relevant variables. Since adiabaticity is a widespread phenomenon, STA methods also extended beyond the quantum world, to optical devices, classical mechanical systems, and statistical physics. Shortcuts to adiabaticity combine well with other concepts and techniques, in particular with optimal control theory, and pose fundamental scientific and engineering questions such as finding speed limits, quantifying the third law, or determining process energy costs and efficiencies. We review concepts, methods and applications of shortcuts to adiabaticity and outline promising prospects, as well as open questions and challenges ahead.

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Section: ;mentioning

confidence: 99%

Section: G Optimal Control and Shortcuts To Adiabaticitymentioning

confidence: 99%

Section: Cranesmentioning

confidence: 99%

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Shortcuts to adiabaticity: Concepts, methods, and applications

et al. 2019

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“…The essence of STA is that it drives the system to the same final state as a slow adiabatic process but in a much shorter time, since it does not necessarily follow the instantaneous eigenstates. It has been exploited to efficiently perform various tasks in several fields of optics [15][16][17][18][19]. Here, we show that STA can take advantage of the large enhanced nonlinearity and lead to a substantially larger amount of entanglement, compared to that obtained in the recent work [14].…”

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confidence: 69%

Efficient entanglement generation between exciton-polaritons using shortcuts to adiabaticity

Stefanatos

Paspalakis

2018

Opt. Lett.

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We use shortcuts to adiabaticity, a method introduced to speed up adiabatic quantum dynamics, for the efficient generation of entanglement between exciton-polaritons in coupled semiconductor microcavities. A substantial improvement is achieved, compared to a recently proposed method that essentially enhances the nonlinearity of the system. Our method takes advantage of a time-dependent nonlinearity, which can become larger than the Josephson coupling between the cavities, while the conventional method is restricted to a constant nonlinearity lower than the coupling. The suggested procedure is expected to also find application in other research areas in optics, where nonlinear interacting bosons are encountered.

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“…1(a) and the other one located downstream being a three-waveguide adiabatic passage structure (AC2). AC2 is used to further spatially transfer the TM-polarized wave transmitted from AC1 through waveguide a to the outer waveguide g mediated by single slash waveguide f. In AC2, the two outer waveguides are tapered in opposite direction to effectively shorten the adiabatic coupling length (L AC2 = 15 mm), as suggested by the "shortcut to adiabaticity" technique [32], for reducing the total length of the device. An interesting comparison can be made to a 50mm long, three-waveguide adiabatic coupler built in Ti:LiNbO 3 reported in [23] without using the taper waveguide design.…”

Section: Device Design and Performance Simulationmentioning

confidence: 99%

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

et al. 2019

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We report, to the best of our knowledge, the first broadband polarization mode splitter (PMS) based on the adiabatic light passage mechanism in the lithium niobate (LiNbO 3 ) waveguide platform. A broad bandwidth of ~140 nm spanning telecom S, C, and L bands at polarization-extinction ratios (PER) of >20 dB and >18 dB for the TE and TM polarization modes, respectively, is found in a five-waveguide adiabatic coupler scheme whose structure is optimized by an adiabaticity engineering process in titanium-diffused LiNbO 3 waveguides. When the five-waveguide PMS is integrated with a three-waveguide "shortcut to adiabaticity" structure, we realize a broadband, high splitting-ratio (η c ) mode splitter for spatial separation of TE-(H-) polarized pump (700-850 nm for η c >99%), TM-(V-) polarized signal (1510-1630 nm for η c >97%), and TE-(H-) polarized idler (1480-1650 nm for η c >97%) modes. Such a unique integrated-optical device is of potential for facilitating the onchip implementation of a pump-filtered, broadband tunable entangled quantum-state generator.

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Short and robust directional couplers designed by shortcuts to adiabaticity

Cited by 56 publications

References 21 publications

Shortcuts to adiabaticity: Concepts, methods, and applications

Shortcuts to adiabaticity: Concepts, methods, and applications

Efficient entanglement generation between exciton-polaritons using shortcuts to adiabaticity

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

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