Experimental Fock-State Superradiance

Ortiz-Gutiérrez, Luis; Muñoz-Martínez, L. F.; Barros, D. F.; Morales, Johan E.O.; Moreira, Raoni S. N.; Alves, Natalia; Tieco, Ayanne F.G.; Saldanha, Pablo L.; Felinto, D.

doi:10.1103/physrevlett.120.083603

Cited by 20 publications

(11 citation statements)

References 22 publications

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“…And the second step is to prepare the Fock state of this phonon mode, which still remains a great challenge until now. Nevertheless, we are also sure about that a plenty of achievements on generating the Fock state will support our scheme to some extent 40‐48 . For this NV spin, we can initialize it into the dressed state | d ( g )⟩ with the assistance of the MW fields 32 …”

Section: The Basic Physical Mechanismmentioning

confidence: 94%

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Yang

Zhou

Lü

et al. 2021

Quantum Engineering

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A simple theoretical scheme with respect to preparing the maximum entanglement of a nitrogen‐vacancy (NV) spin and the quantized nanotubes carried with the tunable direct current is studied in this work. Basing on its inherent ℤ2 symmetry of the general Jaynes–Cummings model in this spin–phonon coupling system, two special adiabatic channels to bridge the initial discrete ground states and the final ground states with the maximum entanglement are discussed. To further supplement this scheme, we also discuss another equivalent and suitable setup, namely the NV spin and surface acoustic wave strong strain coupling scheme. Owing to adiabaticity, this scheme may be considered as an encouraged attempt for preparing the nonclassical state utilizing the systemic symmetry.

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Section: The Basic Physical Mechanismmentioning

confidence: 94%

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Yang

Zhou

Lü

et al. 2021

Quantum Engineering

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“…A striking feature of the two-photon decay is the superradiant enhancement of emission [1,7,28], observed both in ultracold and warm atomic ensembles at high optical depths. The system thus contributes to recent fundamental studies of superradiant emission in cold atoms [39][40][41]. Among many arXiv:1907.09001v1 [quant-ph]…”

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confidence: 92%

Superradiant parametric conversion of spin waves

et al. 2019

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Atomic-ensemble spin waves carrying single-photon Fock states exhibit nonclassical many-body correlations in-between atoms. The same correlations are inherently associated with single-photon superradiance, forming the basis of a plethora of quantum light-matter interfaces. We devise a scheme allowing the preparation of spatially-structured superradiant states in the atomic two-photon cascade using spin-wave light storage. We thus show that long-lived atomic ground-state spin waves can be converted to photon pairs opening the way towards non-linear optics of spin waves via multi-wave mixing processes.Spatially extended atomic ensembles are a particularly versatile medium allowing generation and control of light with widely varying properties. Fulfilment of the phasematching (PM) condition facilitates efficient generation, storage and retrieval of single photons. Superradiance is inherently linked to the phase-matched emission and, in particular, spin waves (SW) that store information about light in the atomic coherence are superradiant Dicke states N −1/2 j e iKrj |g 1 . . . h j . . . g N [1]. In practice, the Λ scheme of atomic levels, which forms the basis of the Duan-Lukin-Cirac-Zoller quantum entanglement distribution protocol [2], is well-known for its capabilities to generate photon pairs with both non-trivial temporal [3] and spatially-multimode structure [4]. There, light is interfaced with a coherence between two metastable ground-state sublevels.An alternative ladder or diamond schemes allow generation of two-color photon pairs, and attract much attention [5-8] also for single-photon storage [9, 10] and in Rydberg-blockaded media [11,12]. In those cases the associated SWs lie between a ground state and an excited atomic state and are intermediate steps in the generation of a photon pair. More complex manipulations of those SWs, such as temporal [13][14][15][16][17] and spatial [18] mutli-SW beamsplitters demonstrated for ground-state SWs, remain elusive. Such control would allow SW-based enginieering of photon pair emission, possibly also extensible to deterministic quantum nonlinear optics based on Rydberg atoms [19].Here we show that the properties of a phase-matched cascaded atomic decay can be engineered via proper preparation of the atomic SW state. In particular, we treat the SW prepared in the Raman process as one of the fields participating in the parametric conversion, similarly as a pump field in a spontaneous parametric downconversion (SPDC) in nonlinear crystals [20]. Hitherto schemes necessarily required that the atom starts and ends the wave-mixing processes in the same ground state, as dictated by the principles of energy and momentum conservation. This requirement can be leveraged if the ensemble is first prepared in a superposition state, or in other words some coherence is present.We generate a strong atomic coherence (SW) between |g and |h via Raman interaction in the Λ scheme, as depicted in Fig. 1(a). The two pump fields (P1 and P2), as in Fig. 1(b), then transfer the coherence |g h|...

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“…These states underlie the physical phenomena of collective spontaneous emission (Dicke superradiance) [5][6][7][8] and superradiant phase transitions [9][10][11]. Furthermore, the enhancement of light-matter interaction in such systems has implications for design and implementation of a number of quantum information processing blocks, such as transducers [12], memories [13] and nonclassical light sources [14].…”

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confidence: 99%

Superradiance in dynamically modulated Tavis-Cumming model with spectral disorder

White,

Trivedi,

Narayanan

et al. 2021

Preprint

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Superradiance is a cooperative phenomenon in quantum optical systems wherein the emission of photons from a quantum emitter is enhanced due to other quantum emitters coupling to the same electromagnetic mode. However, disorder in the resonant frequencies of the quantum emitters can prohibit this effect. In this paper, we study the interplay between superradiance, spectral disorder and dynamical modulation in a Tavis-Cumming model wherein all the emitters couple to a single resonant electromagnetic mode. As a consequence of the all-to-all coupling between the emitters, the presence of spectral disorder never prohibits the formation of a superradiant state over an extensive number of emitters. Furthermore, in such disordered systems, we show that a quantum control protocol modulating the resonant frequency of the optical mode leads to a multiplicative enhancement in the superradiance even in the limit of large number of emitters. Our results are relevant to experimental demonstration and application of superradiant effects in solid-state quantum optical systems such as color centers or rare-earth ions.

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Experimental Fock-State Superradiance

Cited by 20 publications

References 22 publications

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Superradiant parametric conversion of spin waves

Superradiance in dynamically modulated Tavis-Cumming model with spectral disorder

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Experimental Fock-State Superradiance

Cited by 20 publications

References 22 publications

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z 2 symmetry

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z 2 symmetry

Superradiant parametric conversion of spin waves

Superradiance in dynamically modulated Tavis-Cumming model with spectral disorder

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Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry

Adiabatic preparation of maximum entanglement in hybrid quantum systems with the Z ₂ symmetry