Dynamical creation and detection of entangled many-body states in a chiral atom chain

Buonaiuto, Giuseppe; Jones, Ryan; Olmos, Beatriz; Lesanovsky, Igor

doi:10.1088/1367-2630/ab4f50

Cited by 26 publications

(29 citation statements)

References 47 publications

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“…Our work on the simplest possible coupled system, that of a dimer, helps to provide insight into more complicated systems, such as chirally coupled chains [93][94][95][96][97][98][99]. Our results also pave the way for future work on chirally coupled metasurfaces, as the young field of chiral quantum optics continues to evolve.…”

Section: Discussionmentioning

confidence: 83%

Asymmetric coupling between two quantum emitters

et al. 2020

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We study a prototypical model of two coupled two-level systems, where the competition between coherent and dissipative coupling gives rise to a rich phenomenology. In particular, we analyze the case of asymmetric coupling, as well as the limiting case of chiral (or one-way) coupling. We investigate various quantum optical properties of the system, including its steady-state populations, power spectrum, and second-order correlation functions, and outline the characteristic features which emerge in each quantity as one sweeps through the nontrivial landscape of effective complex couplings. Most importantly, we reveal instances of population trapping, unexpected spectral features, and strong emission correlations.

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Section: Discussionmentioning

confidence: 83%

Asymmetric coupling between two quantum emitters

et al. 2020

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“…An alternative approach that allows subradiant states to emerge for large ratios a/λ is changing the radiation field's boundary conditions by placing, e.g. a surface or a waveguide [33,[55][56][57][58][59][60][61][62] near the atoms, which in turn modifies the exchange interaction and dissipation. Another experimental challenge is the preparation of the subradiant wave packets.…”

Section: Discussionmentioning

confidence: 99%

Subradiance-protected excitation transport

2019

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We explore excitation transport within a one-dimensional chain of atoms where the atomic transition dipoles are coupled to the free radiation field. When the atoms are separated by distances smaller or comparable to the wavelength of the transition, the exchange of virtual photons leads to the transport of the excitation through the lattice. Even though this is a strongly dissipative system, we find that the transport is subradiant, that is, the excitation lifetime is orders of magnitude longer than the one of an individual atom. In particular, we show that a subspace of the spectrum is formed by subradiant states with a linear dispersion relation, which allows for the dispersionless transport of wave packets over long distances with virtually zero decay rate. Moreover, the group velocity and direction of the transport can be controlled via an external uniform magnetic field while preserving its subradiant character. The simplicity and versatility of this system, together with the robustness of subradiance against disorder, makes it relevant for a range of applications such as lossless energy transport and long-time light storage.

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“…While it is well understood how the radiative properties of a single atom are altered by the presence of a nanofiber [34][35][36][37], much less is known about the behavior of atomic ensembles [38][39][40][41][42]. However, understanding this situation is of increasing importance, as collections of emitters near a nanofiber promise applications, e.g., in quantum information routing and processing [43][44][45][46][47][48][49][50][51]. Moreover, the collective dissipative dynamics resulting from a competition between the coupling to the unguided modes of the free space and the guided ones of the nanofiber may result in the formation of complex manybody phases and phase transitions [21,51].…”

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confidence: 99%

Collectively Enhanced Chiral Photon Emission from an Atomic Array near a Nanofiber

et al. 2020

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Emitter ensembles interact collectively with the radiation field. In the case of a one-dimensional array of atoms near a nanofiber, this collective light-matter interaction does not only lead to an increased photon coupling to the guided modes within the fiber, but also to a drastic enhancement of the chirality in the photon emission. We show that near-perfect chirality is already achieved for moderately-sized ensembles, containing 10 to 15 atoms. This is of importance for developing an efficient interface between atoms and waveguide structures with unidirectional coupling, with applications in quantum computing and communication such as the development of non-reciprocal photon devices or quantum information transfer channels.

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Dynamical creation and detection of entangled many-body states in a chiral atom chain

Cited by 26 publications

References 47 publications

Asymmetric coupling between two quantum emitters

Asymmetric coupling between two quantum emitters

Subradiance-protected excitation transport

Collectively Enhanced Chiral Photon Emission from an Atomic Array near a Nanofiber

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