Superradiance decoherence caused by long-range Rydberg-atom pair interactions

Suarez, Elmer; Wolf, P.; Weiss, P.B.; Slama, Sebastian

doi:10.1103/physreva.105.l041302

Cited by 14 publications

(10 citation statements)

References 37 publications

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“…5. Our findings are consistent with recent experiments in Rydberg atoms where the atomatom electromagnetic coupling led to superradiance decoherence [22], and the significant deviations observed in quantum dots [17] from the ideal N 2 dependence. When decaying, groups of dots exhibit synchronized oscillations that become more irregular and for larger dipoles and density, suggesting transitions towards chaotic dynamics [23].…”

supporting

confidence: 93%

Transient dynamics of subradiance and superradiance in open optical ensembles

Lu¹,

Shanker²,

Piermarocchi³

2022

Preprint

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We introduce a computational Maxwell-Bloch framework for investigating out of equilibrium optical emitters in open cavity-less systems. To do so, we compute the pulse-induced dynamics of each emitter from fundamental light-matter interactions and self-consistently calculate their radiative coupling, including phase inhomogeneity from propagation effects. This semiclassical framework is applied to open systems of quantum dots with different density and dipolar coupling. We observe that signatures of superradiant behavior, such as directionality and faster decay, are weak for systems with extensions comparable to λ/2. In contrast, subradiant features are robust and can produce long-term population trapping effects. This computational tool enables quantitative investigations of large optical ensembles in the time domain and could be used to design new systems with enhanced superradiant and subradiant properties.

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supporting

confidence: 93%

Transient dynamics of subradiance and superradiance in open optical ensembles

Lu¹,

Shanker²,

Piermarocchi³

2022

Preprint

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show abstract

“…Again, the rate of decoherence is slower for higher values of the magnetic field, as has been pointed out in previous theoretical and experimental results [34][35][36][37]. These results can be later extended to non-commutative space in two dimensions and other anomalous types of couplings can be explored using similar formalism and the outcomes can be further tested in suitable cold atom experiments [45,[49][50][51].…”

Section: Discussionsupporting

confidence: 66%

Decoherence and the ultraviolet cutoff: non-Markovian dynamics of a charged particle in a magnetic field

Bhattacharjee¹,

Mandal²,

Sinha³

2023

Preprint

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We derive a non-Markovian master equation for a charged particle in a magnetic field coupled to a bath and study decoherence by analysing the temporal decay of the off-diagonal elements of the reduced density matrix in the position basis. The coherent oscillations characterised by the cyclotron frequency get suppressed as a result of decoherence due to coupling with the environment. We consider an Ohmic bath with three distinct models for the high-frequency cutoff for the spectral density of the bath and compare the three cases. As expected, the three cutoff models converge in the limit of the uppermost frequency of the bath tending to infinity. We notice a dramatic slowing down of loss of coherence in the low-temperature limit dominated by zero point quantum fluctuations compared to the hightemperature classical limit dominated by thermal fluctuations. We also go beyond the Ohmic model and study super-Ohmic and sub-Ohmic baths with the spectral densities deviating from a linear dependence on the frequency. Our results are testable in a state of the art cold atom laboratory.

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“…the Dicke limit R jk λ [2], decay becomes collective such that its rate depends on the number of atoms in the ensemble, and hence can be much larger than the individual decay rate [3]. Since predicted by Dicke, superradiance has been confirmed in a variety experimental settings including Rydberg atoms [4][5][6][7][8], cavities [9][10][11], Bose-Einstein condensates [12][13][14], and quantum dots [15]. On the other hand, insights gained from the study of superradiance allow us to develop applications in quantum metrology [16,17], narrow linewidth lasers [18][19][20] and atomic clocks [21], etc.…”

Section: Introductionmentioning

confidence: 99%

Superradiance-induced multistability in one-dimensional driven Rydberg lattice gases

Bai

Jiao

et al. 2022

Phys. Rev. A

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We study steady state phases of a one-dimensional array of Rydberg atoms coupled by a microwave (MW) field where the higher energy Rydberg state decays to the lower energy one via single-body and collective (superradiant) decay. Using mean-field approaches, we examine the interplay among the MW coupling, intra-state van der Waals (vdW) interaction, and single-body and collective dissipation between Rydberg states. A linear stability analysis reveals that a series of phases, including uniform, antiferromagnetic, oscillatory, and bistable and multistable phases can be obtained. Without the vdW interaction, only uniform phases are found. In the presence of the vdW interaction, multistable solutions are enhanced when increasing the strength of the superradiant decay rate. Our numerical simulations show that the bistable and multistable phases are stabilized by superradiance in a long chain. The critical point between the uniform and multistable phases and its scaling with the atom number is obtained. Through numerically solving the master equation of a finite chain, we show that the mean-field multistable phase could be characterized by expectation values of Rydberg populations and two-body correlations between Rydberg atoms in different sites.

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Superradiance decoherence caused by long-range Rydberg-atom pair interactions

Cited by 14 publications

References 37 publications

Transient dynamics of subradiance and superradiance in open optical ensembles

Transient dynamics of subradiance and superradiance in open optical ensembles

Decoherence and the ultraviolet cutoff: non-Markovian dynamics of a charged particle in a magnetic field

Superradiance-induced multistability in one-dimensional driven Rydberg lattice gases

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