Polarization Engineering in Photonic Crystal Waveguides for Spin-Photon Entanglers

Young, Andrew; Thijssen, A. C. T.; Beggs, Daryl M.; Androvitsaneas, Petros; Kuipers, L.; Rarity, John; Hughes, Stephen; Oulton, Ruth

doi:10.1103/physrevlett.115.153901

Cited by 191 publications

(181 citation statements)

References 33 publications

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“…For instance, it may be used to map the spin state of a single electron or hole in a quantum dot to the propagation path of a photon enabling optical singleshot spin read out [56]. Based on that, a layout of a deterministic photonic CNOT gate integrated on a chip was recently reported, for which the required experimental resources are within reach [29].…”

Section: Elementary Devices Based On Chiral-light Matter Interactionmentioning

confidence: 99%

Chiral quantum optics

Lodahl¹,

Mahmoodian²,

Stobbe³

et al. 2017

Nature

1,273

1,172

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At the most fundamental level, the interaction between light and matter is manifested by the emission and absorption of single photons by single quantum emitters. Controlling light-matter interaction is the basis for diverse applications ranging from light technology to quantum-information processing. Many of these applications are nowadays based on photonic nanostructures strongly benefitting from their scalability and integrability. The confinement of light in such nanostructures imposes an inherent link between the local polarization and propagation direction of light. This leads to chiral light-matter interaction, i.e., the emission and absorption of photons depend on the propagation direction and local polarization of light as well as the polarization of the emitter transition. The burgeoning research field of chiral quantum optics offers fundamentally new functionalities and applications both for single emitters and ensembles thereof. For instance, a chiral light-matter interface enables the realization of integrated non-reciprocal single-photon devices and deterministic spin-photon interfaces. Moreover, engineering directional photonic reservoirs opens new avenues for constructing complex quantum circuits and networks, which may be applied to simulate a new class of quantum many-body systems.

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Section: Elementary Devices Based On Chiral-light Matter Interactionmentioning

confidence: 99%

Chiral quantum optics

Lodahl¹,

Mahmoodian²,

Stobbe³

et al. 2017

Nature

1,273

1,172

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“…The tunable asymmetry of the coupling to leftand right-moving excitations leads to a pure steady state in which neighboring spins are dimerized, representing a novel form of dissipative quantum magnetism [69,70]. While the cold-atom realization provides particular advantages, our results also apply to implementations with photons [37][38][39]. We have shown [71] that the present results generalize to the dissipative formation of pure many-body states of spin-1/2 tetramers, hexamers, etc., by appropriate driving patterns [10].…”

mentioning

confidence: 81%

“…1(a)]. Further, it is also of immediate relevance in the context of recent proposals and experiments for two-level systems (TLSs) coupled to a photonic chiral reservoir [36][37][38][39].…”

mentioning

confidence: 99%

Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains

et al. 2014

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We consider the nonequilibrium dynamics of a driven dissipative spin chain with chiral coupling to a one-dimensional (1D) bosonic bath, and its atomic implementation with a two-species mixture of cold quantum gases. The reservoir is represented by a spin-orbit coupled 1D quasicondensate of atoms in a magnetized phase, while the spins are identified with motional states of a separate species of atoms in an optical lattice. The chirality of reservoir excitations allows the spins to couple differently to left-and right-moving modes, which in our atomic setup can be tuned from bidirectional to purely unidirectional. Remarkably, this leads to a pure steady state in which pairs of neighboring spins form dimers that decouple from the remainder of the chain. Our results also apply to current experiments with two-level emitters coupled to photonic waveguides.PACS numbers: 03.65. Yz, 67.85.Jk, 42.50.Dv, 03.67.Bg In an open quantum many-body system, the competition of particle interactions, external driving and the dissipative coupling to a quantum reservoir can result in novel scenarios for the formation of strongly correlated quantum states [1]. This is not only of interest as a nonequilibrium condensed matter problem per se [2-9], but dissipatively prepared entangled states also provide a potential resource for quantum information tasks [10][11][12][13][14][15]. Quantum optical systems of cold atoms or solid-state impurities provide a natural setting for such open manybody quantum systems. The paradigmatic example is given by an ensemble of two-level atoms driven by laser light, and coupled to a photonic reservoir [16][17][18][19], e.g., as one-dimensional (1D) engineered photonic band gap materials [20]. These model systems can be described as a collection of spin-1/2 systems, which via the photonic modes interact with long-range dipole-dipole interactions, and exhibit collective and enhanced decay into radiation modes of photonic structures. The realization of such Dicke-type models [21, 22] coupled to low-dimensional quantum reservoirs, and the observation of the associated dynamical quantum phases and phase transitions are, at present, an outstanding challenge in quantum optics [23][24][25][26].In the present work, we introduce a realization of dissipative quantum magnetism based on cold atoms in optical lattices [27,28], where the quantum reservoir is represented by phononic degrees of freedom of a 1D spin-orbit coupled Bose-Einstein quasicondensate (quasi-BEC) [29][30][31][32][33][34][35]. This model system provides a faithful and experimentally realistic representation of a chain of driven spin-1/2 particles coupled to a 1D bosonic bath. Crucially, spin-orbit coupling (SOC) makes the reservoir chiral, with the spins coupling differently to the left and right propagating modes, γ L = γ R [cf. Fig. 1(a)]. This asymmetry is, moreover, tunable via the atomic parameters, making it possible to engineer the spin-bath coupling from purely unidirectional to fully bidirectional.To describe the dynamics of our 1D spin c...

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“…For the optimized design in Supplementary Note 6, efficiency > 90 % could potentially be achieved. We note that the source here is symmetric, so emission is in either ±z direction; unidirectional emission can potentially be implemented with an end-mirror or through chiral coupling [30][31][32] . We furthermore emphasize that the light-matter interaction geometry can take the form of any waveguide-based geometry, such as 1D photonic crystal cavities, or waveguide-coupled microring or microdisk resonators (see below and Supplementary Note 7 for examples), which may provide high β through Purcell enhancement.…”

Section: Resultsmentioning

confidence: 99%

A heterogeneous III-V / Si3N4 quantum photonic integration platform

Davanço

Liu

Sapienza

et al. 2017

Quantum Information and Measurement (QIM) 2017

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Single quantum emitters are an important resource for photonic quantum technologies, constituting building blocks for single-photon sources, stationary qubits, and deterministic quantum gates. Robust implementation of such functions is achieved through systems that provide both strong light-matter interactions and a low-loss interface between emitters and optical fields. Existing platforms providing such functionality at the single-node level present steep scalability challenges. Here, we develop a heterogeneous photonic integration platform that provides such capabilities in a scalable on-chip implementation, allowing direct integration of GaAs waveguides and cavities containing self-assembled InAs/GaAs quantum dots -a mature class of solidstate quantum emitter -with low-loss Si 3 N 4 waveguides. We demonstrate a highly efficient optical interface between Si 3 N 4 waveguides and single quantum dots in GaAs geometries, with performance approaching that of devices optimized for each material individually. This includes quantum dot radiative rate enhancement in microcavities, and a path for reaching the non-perturbative strong coupling regime.

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Polarization Engineering in Photonic Crystal Waveguides for Spin-Photon Entanglers

Cited by 191 publications

References 33 publications

Chiral quantum optics

Chiral quantum optics

Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains

A heterogeneous III-V / Si3N4 quantum photonic integration platform

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