Interaction signatures and non-Gaussian photon states from a strongly driven atomic ensemble coupled to a nanophotonic waveguide

Olmos, Beatriz; Buonaiuto, Giuseppe; Schneeweiß, Philipp; Lesanovsky, Igor

doi:10.1103/physreva.102.043711

Cited by 12 publications

(15 citation statements)

References 51 publications

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“…Recently, the efficient coupling of atoms to nanophotonic structures in low dimensions [34] has enabled the study of almost perfectly one-dimensional systems that show infinite-range interactions [35] but also exotic chiral, coherent light-matter interactions which depend on the polarization of the incoming light [36]. Such waveguides have a high potential to generate nonclassical states of light [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Nonexponential decay of a collective excitation in an atomic ensemble coupled to a one-dimensional waveguide

et al. 2020

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We study the dynamics of a single excitation coherently shared among an ensemble of atoms and coupled to a one-dimensional wave guide. The coupling between the matter and the light field gives rise to collective phenomena such as superradiant states with an enhanced initial decay rate, but also to the coherent exchange of the excitation between the atoms. We find that the competition between the two phenomena provides a characteristic dynamics for the decay of the excitations, and remarkably exhibits an algebraic behavior, instead of the expected standard exponential one, for a large number of atoms. The analysis is first performed for a chiral waveguide, where the problem can be solved analytically. Remarkably, we demonstrate that a bidirectional waveguide exhibits the same behavior for large number of atoms and, therefore, it is possible to experimentally access characteristic properties of a chiral waveguide also within a bidirectional waveguide.

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Section: Introductionmentioning

confidence: 99%

Nonexponential decay of a collective excitation in an atomic ensemble coupled to a one-dimensional waveguide

et al. 2020

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“…In this work we discuss the many-body phases of a light-matter system that is composed of emitters coupled to light modes which propagate in a waveguide. This setup, which is subject matter of many current experimental studies [37,38], has the appeal that the manybody dynamics can be reduced to a small set of degrees of freedom, and thus lends itself to a largely analytical treatment [39][40][41][42][43][44][45][46][47][48]. We show that by implementing an instantaneous feedback protocol that relies on the mea-FIG.…”

mentioning

confidence: 99%

“…. , in fact suppresses such unwanted decay channels [45,47]. Under these conditions and employing the Born-Markov approximation, the dynamics of the emitter-waveguide system is described by a particularly simple master equation:…”

mentioning

confidence: 99%

Dynamical Phases and Quantum Correlations in an Emitter-Waveguide System with Feedback

et al. 2021

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We investigate the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system using a minimal model. Employing homodyne detection of photons emitted from a laser-driven emitter ensemble into the modes of a waveguide allows to generate intricate dynamical phases. In particular, we show the emergence of a time-crystal phase, the transition to which is controlled by the feedback strength. Feedback enables furthermore the control of many-body quantum correlations, which become manifest in spin squeezing in the emitter ensemble. Developing a theory for the dynamics of fluctuation operators we discuss how the feedback strength controls the squeezing and investigate its temporal dynamics and dependence on system size. The largely analytical results allow to quantify spin squeezing and fluctuations in the limit of large number of emitters, revealing critical scaling of the squeezing close to the transition to the time-crystal. Our study corroborates the potential of integrated emitter-waveguide systemswhich feature highly controllable photon emission channels -for the exploration of collective quantum phenomena and the generation of resources, such as squeezed states, for quantum enhanced metrology.

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“…In this work we discuss the many-body phases of a lightmatter system that is composed of emitters coupled to light modes which propagate in a waveguide. This setup, which is subject matter of many current experimental studies [37,38], has the appeal that the many-body dynamics can be reduced to a small set of degrees of freedom, and thus lends itself to a largely analytical treatment [39][40][41][42][43][44][45][46][47][48]. We show that by implementing an instantaneous feedback protocol that relies on the measurement of a quadrature of guided light [34,[49][50][51][52][53][54][55][56][57], a rich variety of dynamical phases can be achieved, among them a continuous time crystal.…”

mentioning

confidence: 99%

“…. , in fact suppresses such unwanted decay channels [45,47]. Under these conditions and employing the Born-Markov approximation, the dynamics of the emitterwaveguide system is described by a particularly simple master equation:…”

mentioning

confidence: 99%

Dynamical phases and quantum correlations in an emitter-waveguide system with feedback

Buonaiuto,

Carollo,

Olmos

et al. 2021

Preprint

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We investigate the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system using a minimal model. Employing homodyne detection of photons emitted from a laser-driven emitter ensemble into the modes of a waveguide allows to generate intricate dynamical phases. In particular, we show the emergence of a time-crystal phase, the transition to which is controlled by the feedback strength. Feedback enables furthermore the control of many-body quantum correlations, which become manifest in spin squeezing in the emitter ensemble. Developing a theory for the dynamics of fluctuation operators we discuss how the feedback strength controls the squeezing and investigate its temporal dynamics and dependence on system size. The largely analytical results allow to quantify spin squeezing and fluctuations in the limit of large number of emitters, revealing critical scaling of the squeezing close to the transition to the time-crystal. Our study corroborates the potential of integrated emitter-waveguide systems -which feature highly controllable photon emission channels -for the exploration of collective quantum phenomena and the generation of resources, such as squeezed states, for quantum enhanced metrology.

show abstract

Interaction signatures and non-Gaussian photon states from a strongly driven atomic ensemble coupled to a nanophotonic waveguide

Cited by 12 publications

References 51 publications

Nonexponential decay of a collective excitation in an atomic ensemble coupled to a one-dimensional waveguide

Nonexponential decay of a collective excitation in an atomic ensemble coupled to a one-dimensional waveguide

Dynamical Phases and Quantum Correlations in an Emitter-Waveguide System with Feedback

Dynamical phases and quantum correlations in an emitter-waveguide system with feedback

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