Strongly Correlated Photon Transport in Waveguide Quantum Electrodynamics with Weakly Coupled Emitters

Mahmoodian, Sahand; Čepulkovskis, Mantas; Das, Sumanta; Lodahl, Peter; Hammerer, Klemens; Sørensen, Anders S.

doi:10.1103/physrevlett.121.143601

Cited by 98 publications

(82 citation statements)

References 61 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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“…The lateral dimension of the entire circulator can be a few millimeters [39]. These properties make our chiral interface highly attractive for, e.g., on-chip routing of microwave signals [10,[14][15][16][17][18][19][20][21][22][23]36,37] as well as fundamental studies of chiral waveguide QED [3,4,7,46].…”

Section: (C) (Including the Separation D)mentioning

confidence: 99%

Charge-Noise Insensitive Chiral Photonic Interface for Waveguide Circuit QED

et al. 2021

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A chiral photonic interface is a quantum system that has different probabilities for emitting photons to the left and right. An on-chip compatible chiral interface is attractive for both fundamental studies of lightmatter interactions and applications to quantum information processing. We propose such a chiral interface based on superconducting circuits, which has wide bandwidth, rich tunability, and high tolerance to fabrication variations. The proposed interface consists of a core that uses Cooper-pair boxes (CPBs) to break time-reversal symmetry, and two superconducting transmons that connect the core to a waveguide in the manner reminiscent of a "giant atom." The transmons form a state decoupled from the core, akin to dark states of atomic physics, rendering the whole interface insensitive to the CPB charge noise. The proposed interface can be extended to realize a broadband fully passive on-chip circulator for microwave photons.

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“…For instance, Jones et al have shown that collective effects arising from a 10-15 QE chain can result in a near-perfect chiral light-matter interaction [42]. Mahmoodian et al reported that strongly correlated photon emission can be achieved in optically dense emitter ensembles chirally coupled to waveguides even with weak coupling strengths [43]. And Mukhopadhyay and Agarwal have discussed the possibility of achieving perfect transparency in a chain of an even number of nonidentical QEs coupled to a waveguide with separation equal to a halfintegral multiple of resonant wavelength [44].…”

Section: Routing Improvement Due To Collective Effects Of Multiplementioning

confidence: 99%

Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder

Poudyal

Mirza

2020

Phys. Rev. Research

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We examine the routing scheme of single photons in a one-dimensional periodic chain of two-level quantum emitters (QEs) strongly coupled to two waveguides in a ladder configuration. It is known that for a single-emitter chiral waveguide ladder setting photons can be redirected from one waveguide to another with a 100% probability (deterministically) provided the resonance condition is met and spontaneous emission is completely ignored. However, when the spontaneous emission is included the routing scheme becomes considerably imperfect. In this paper, we present a solution to this issue by considering a chain of QEs where, in addition to the waveguide mediated interaction among emitters, a direct and infinitely long-ranged dipole-dipole interaction (DDI) is taken into account. We show that the collective effects arising from the strong DDI protect the routing scheme from spontaneous emission loss. In particular, we demonstrate that the router operation can be improved from 58 to ≈95% in a typical dissipative chiral light-matter interface consisting of nanowire modes strongly interacting with a linear chain of 30 quantum dots. With the recent experimental progress in chiral quantum optics, trapped QEs evanescently coupled to tapered nanofibers can serve as a platform for the experimental realization of this paper.

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Strongly Correlated Photon Transport in Waveguide Quantum Electrodynamics with Weakly Coupled Emitters

Cited by 98 publications

References 61 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

Charge-Noise Insensitive Chiral Photonic Interface for Waveguide Circuit QED

Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder

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