Atomtronic Matter-Wave Lensing

Saurabh, Pandey; Mas, Hector; Vasilakis, Georgios; Klitzing, Wolf von

doi:10.1103/physrevlett.126.170402

“…Indeed, the anisotropic shape of the lenses and their ability to focus (concentrate) polariton condensates puts them in a unique position to operate as directional nonlinear el-ements for information processing in the same spirit as planar optical transistors. Our findings are also relevant to atomtronics [54,55] where arbitrary all-optical control over the atom's potential landscape is possible [56].…”

Section: Discussionmentioning

confidence: 76%

Reservoir optics with exciton-polariton condensates

Wang

¹

,

Sigurðsson

²

,

Töpfer

³

et al. 2021

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We investigate an all-optical microscale planar lensing technique based on coherent fluids of semiconductor cavity exciton-polariton condensates. Our theoretical analysis underpins the potential in using state-of-the-art spatial light modulation of nonresonant excitation beams to guide and focus polariton condensates away from their pumping region. The nonresonant excitation profile generates an excitonic reservoir that blueshifts the polariton mode and provides gain, which can be spatially tailored into lens shapes at the microscale to refract condensate waves. We propose several different avenues in controlling the condensate fluid, and demonstrate formation of highly enhanced and localised condensates away from the pumped reservoirs. This opens new perspectives in guiding quantum fluids of light and generating polariton condensates that are shielded from detrimental reservoir dephasing effects.

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“…The possible reservoir devices and their applications are not limited by the examples we present in this paper, and we hope this work will stimulate the theoretical and experimental application of reservoir optics in polariton condensates. Our findings are also relevant to atomtronics [49,50] where arbitrary all-optical control over the atom's potential landscape is possible [51].…”

Section: Discussionmentioning

confidence: 76%

Reservoir optics with exciton-polariton condensates

Wang,

Sigurdsson,

Töpfer

et al. 2021

Preprint

0

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We investigate an all-optical microscale planar lensing technique based on coherent fluids of semiconductor cavity exciton-polariton condensates. Our theoretical analysis underpins the potential in using state-of-the-art spatial light modulation of nonresonant excitation beams to guide and focus polariton condensates away from their pumping region. The nonresonant excitation profile generates an excitonic reservoir that blueshifts the polariton mode and provides gain, which can be spatially tailored into lens shapes at the microscale to refract condensate waves. We propose several different avenues in controlling the condensate fluid, and demonstrate formation of highly enhanced and localised condensates away from the pumped reservoirs. This opens new perspectives in guiding quantum fluids of light and generating polariton condensates that are shielded from detrimental reservoir dephasing effects.

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“…One worry that however needs to be addressed in this regard is the thermal expansion of the atomic cloud within the waveguide, which can potentially lead to certain unwanted effects. A recent work by Pandey et al attempts to address this issue (see [44]) by manipulating the spread in the momentum and density distributions of BECs and thermal atomic clouds in time-averaged adiabatic potential (TAAP) waveguides, to which end they demonstrate focusing and collimation of matter waves by using a series of gravito-magnetic matter-wave lenses (time-dependent). A fairly high suppression in the expansion energies of BECs and thermal atomic clouds can be achieved using this technique, thereby minimizing the dispersion of matter waves within the waveguide structure; nevertheless this open new avenues to research along these directions, i.e., the possibility of using atomtronic matter-wave lensing in conjunction with other novel techniques and/or schemes to further suppress the expansion energies of atomic clouds within waveguides is something that deserves greater scrutiny.…”

Section: Future Directions In Matter-wave Interferometrymentioning

confidence: 99%

Stern-Gerlach Interferometry for Tests of Quantum Gravity and General Applications

Lokare

¹

2022

Front. Phys.

0

1

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Stern-Gerlach and/or matter-wave interferometry has garnered significant interest amongst members of the scientific community over the past few decades. Early theoretical results by Schwinger et al. demonstrate the fantastic precision capabilities required to realize a full-loop Stern-Gerlach interferometer, i.e., a Stern-Gerlach setup that houses the capability of recombining the split wave-packets in both, position and momentum space over a certain characteristic interferometric time. Over the years, several proposals have been put forward that seek to use Stern-Gerlach and/or matter-wave interferometry as a tool for a myriad of applications of general interest, some of which include tests for fundamental physics (viz., quantum wave-function collapse, stringent tests for the Einstein equivalence principle at the quantum scale, breaking the Standard Quantum Limit (SQL) barrier, and so forth), precision sensing, quantum metrology, gravitational wave detection and inertial navigation. In addition, a large volume of work in the existing literature has been dedicated to the possibility of using matter-wave interferometry for tests of quantum gravity. Inspired by the developments in this timely research field, this Perspective attempts to provide a general overview of the theory involved, the challenges that are yet to be addressed and a brief outlook on what lays ahead.

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Atomtronic Matter-Wave Lensing

Cited by 23 publications

References 34 publications

Reservoir optics with exciton-polariton condensates

Reservoir optics with exciton-polariton condensates

Reservoir optics with exciton-polariton condensates

Stern-Gerlach Interferometry for Tests of Quantum Gravity and General Applications

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