Photon Blockade with Ground-State Neutral Atoms

Cidrim, A.; Santo, T. S. do Espirito; Schachenmayer, Johannes; Kaiser, Robin; Bachelard, Romain

doi:10.1103/physrevlett.125.073601

Cited by 62 publications

(27 citation statements)

References 55 publications

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“…1(b), we show regimes to realizing Rydberg blockade [2-4], conventional RAB with simultaneous driving [20,21,[23][24][25][26][27][28][30][31][32] as well as sequential-drivingbased RAB [29], where the excitation conditions can be * weibin.Li@nottingham.ac.uk controlled by laser detuning. When using DD interactions, the density-density as well as spin flip-flop interactions co-exist [34,35], leading to complicated many-body dynamics [36]. The resonant DD interactions are considered to construct two- [37] and three-qubit [38] quantum logic gates by using of experimentally observed Förster resonance [39].…”

Section: Introductionmentioning

confidence: 99%

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

2021

Phys. Rev. A

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Resonant laser excitation of multiple Rydberg atoms are prohibited, leading to Rydberg blockade, when the long-range van der Waals interactions are stronger than the laser-atom coupling. Rydberg blockade can be violated, i.e. simultaneous excitation of more than one Rydberg atoms, by off-resonant laser excitation, causing an excitation antiblockade. Rydberg antiblockade gives rise to strongly correlated many-body dynamics and spin-orbit coupling, and also finds quantum computation applications. Instead of commonly used van der Waals interactions, we investigate antiblockade dynamics of two Rydberg atoms interacting via dipole-dipole exchange interactions. We study typical situations in current Rydberg atoms experiments, where different types of dipole-dipole interactions can be achieved by varying Rydberg state couplings. Effective Hamiltonian governing underlying antiblockade dynamics is derived. We illustrate that geometric gates can be realized with the Rydberg antiblockade which is robust against decay of Rydberg states. Our study may stimulate new experimental and theoretical exploration of quantum optics and strongly interacting many-body dynamics with Rydberg antiblockade driven by dipole-dipole interactions.

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Section: Introductionmentioning

confidence: 99%

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

2021

Phys. Rev. A

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“…As the ability to use the electric dipole response of regular ultrathin 2D planar arrays of atoms to control and manipulate light has already been explored in many contexts [13][14][15][16][17][18][19][20][21][22][23][24][25][26], this opens the way to combining both electric and magnetic degrees of freedom. Subwavelength arrays of atoms can operate at a single-photon quantum level [27][28][29][30][31][32] and are increasingly experimentally achievable [33][34][35][36]. Indeed, recent experiments have already investigated the cooperative response of a single layer of atoms, and found characteristic spectral narrowing below the fundamental quantum limit for a single atom [33].…”

Section: Introductionmentioning

confidence: 99%

Cooperative optical wavefront engineering with atomic arrays

Ballantine,

Ruostekoski

2021

Preprint

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Natural materials typically interact weakly with the magnetic component of light which greatly limits their applications. This has led to the development of artificial metamaterials and metasurfaces. However, natural atoms, where only electric dipole transitions are relevant at optical frequencies, can cooperatively respond to light to form collective excitations with strong magnetic, as well as electric, interactions, together with corresponding electric and magnetic mirror reflection properties. By combining the electric and magnetic collective degrees of freedom we show that ultrathin planar arrays of atoms can be utilized as atomic lenses to focus light to subwavelength spots at the diffraction limit, to steer light at different angles allowing for optical sorting, and as converters between different angular momentum states. The method is based on coherently superposing induced electric and magnetic dipoles to engineer a quantum nanophotonic Huygens' surface of atoms, giving full 2𝜋 phase control over the transmission, with close to zero reflection.

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“…These studies were restricted to the single-excitation states, which allows to explore a reduced portion of the Hilbert space (of size N + 1 instead of 2 N , for N two-level emitters). However, only the use of a single-photon source (and thus quantum light) can guarantee an at-most-single-excitation state [32], or the presence of specific mechanisms such as excitation blockade [33,34]. Indeed, collective effects were shown to challenge the notion of "weak drive", since the narrow-linewidth collective modes (that is, the subradiant modes) present a nonlinear reaction to the drive even at very low saturation parameter [35,36].…”

mentioning

confidence: 99%

Generating long-lived entangled states with free-space collective spontaneous emission

Santos,

Cidrim,

Villas-Boas

et al. 2021

Preprint

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Photon Blockade with Ground-State Neutral Atoms

Cited by 62 publications

References 55 publications

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

Cooperative optical wavefront engineering with atomic arrays

Generating long-lived entangled states with free-space collective spontaneous emission

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