Probing few-excitation eigenstates of interacting atoms on a lattice by observing their collective light emission in the far field

Longo, Paolo; Evers, Jörg

doi:10.1103/physreva.90.063834

Cited by 7 publications

(11 citation statements)

References 58 publications

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“…In the presence of an identical, second atom, photons can be exchanged between the two atoms. Due to irreversible loss to the reservoir, the inter-atomic coupling is complex 21 22 23 24 25 . Here, ( ) represents the real-valued cross-damping (cross-coupling) term for two atoms located at positions r i and r j , respectively.…”

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confidence: 99%

Tailoring superradiance to design artificial quantum systems

Longo

Keitel

Evers

2016

Sci Rep

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Cooperative phenomena arising due to the coupling of individual atoms via the radiation field are a cornerstone of modern quantum and optical physics. Recent experiments on x-ray quantum optics added a new twist to this line of research by exploiting superradiance in order to construct artificial quantum systems. However, so far, systematic approaches to deliberately design superradiance properties are lacking, impeding the desired implementation of more advanced quantum optical schemes. Here, we develop an analytical framework for the engineering of single-photon superradiance in extended media applicable across the entire electromagnetic spectrum, and show how it can be used to tailor the properties of an artificial quantum system. This “reverse engineering” of superradiance not only provides an avenue towards non-linear and quantum mechanical phenomena at x-ray energies, but also leads to a unified view on and a better understanding of superradiance across different physical systems.

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confidence: 99%

Tailoring superradiance to design artificial quantum systems

Longo

Keitel

Evers

2016

Sci Rep

Self Cite

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“…The total emission is then a sum over all these processes. The quantity |α Q F (Q/2−k)| 2 that determined the decay rate of the bound state also plays a crucial role in the angular dependence of the emission, which was noted in [24]. By examining the spatial and temporal emission of the bound state, it should be possible to determine its energy and decay rate for a given momentum Q.…”

Section: Discussionmentioning

confidence: 99%

“…Following the steps outlined in Ref. [24], the emission properties of the bound state are given by the correlator g(t, r) = Ê (−) (t, r)Ê (+) (t, r) which can be calculated from the electric field,Ê (−) (t, r). For decay of a pure bound state, ρ(0) = |Q Q|, the correlator g(t, r) is given by…”

Section: Discussionmentioning

confidence: 99%

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Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Parmee

Cooper

2019

Phys. Rev. A

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Chains of coupled two-level atoms behave as 1D quantum spin systems, exhibiting free magnons and magnon bound states. While these excitations are well studied for closed systems, little consideration has been given to how they are altered by the presence of an environment. This will be especially important in systems that exhibit nonlocal dissipation, e.g. systems in which the magnons decay due to optical emission. In this work, we consider free magnon excitations and two-magnon bound states in an XXZ chain with nonlocal dissipation. We prove that whilst the energy of the bound state can lie outside the two-magnon continuum of energies, the decay rate of the bound state has to always lie within the two-magnon continuum of decay rates. We then derive analytically the bound state solutions for a system with nearest-neighbour and next-nearest-neighbour XY interaction and nonlocal dissipation, finding that the inclusion of nonlocal dissipation allows more freedom in engineering the energy and decay rate dispersions for the bound states. Finally, we numerically study a model of an experimental set-up that should allow the realisation of dissipative bound states by using Rydberg-dressed atoms coupled to a photonic crystal waveguide (PCW). We demonstrate that this model can exhibit many key features of our simpler models.

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“…The correlations between the antenna excitations are translated into the correlations between the emitted photons. This enables, for example, the generation of the two‐photon states that are entangled in orbital angular momentum by a symmetrically excited ring antenna, [ 106 ] to reveal the presence of localized bound states in the antenna [ 107 ] and shape spatial photon correlations for the emitting subradiant states. [ 108 ]…”

Section: Quantum Antennasmentioning

confidence: 99%

Quantum Antennas

2020

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Due to the recent groundbreaking developments of nanotechnologies, it became possible to create intrinsically quantum systems able to serve as high-directional antennas in terahertz, infrared, and optical ranges. In fact, the quantum antennas, as devices shaping light on the level of single quanta, have already become key elements in nanooptics and nanoelectronics. The quantum antennas are actively researched for possible implementations in quantum communications, quantum imaging and sensing, and energy harvesting. However, the design and optimization of these emitting/receiving devices are still rather undeveloped in comparison with the well-known methods for conventional radio-frequency antennas. This review provides a discussion of the recent achievements in the concept of the quantum antenna as an open quantum system emitting via interaction with a photonic reservoir. The review is focused on bridging the gap between quantum antennas and their macroscopic classical analogues. Furthermore, the way of quantum-antenna implementation is discussed for different configurations, based on such materials as plasmonic metals, carbon nanotubes, and semiconductor quantum dots.

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Probing few-excitation eigenstates of interacting atoms on a lattice by observing their collective light emission in the far field

Cited by 7 publications

References 58 publications

Tailoring superradiance to design artificial quantum systems

Tailoring superradiance to design artificial quantum systems

Decay rates and energies of free magnons and bound states in dissipative XXZ chains

Quantum Antennas

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