We propose a complete superradiant and subradiant states that can be manipulated and prepared in a three-dimensional atomic array. These subradiant states can be realized by absorbing a single photon and imprinting th...
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We propose a complete superradiant and subradiant states that can be manipulated and prepared in a three-dimensional atomic array. These subradiant states can be realized by absorbing a single photon and imprinting the spatially-dependent phases on the atomic system. We find that the collective decay rates and associated cooperative Lamb shifts are highly dependent on the phases we manage to imprint, and the subradiant state of long lifetime can be found for various lattice spacings and atom numbers. We also investigate both optically thin and thick atomic arrays, which can serve for systematic studies of super- and sub-radiance. Our proposal offers an alternative scheme for quantum memory of light in a three-dimensional array of two-level atoms, which is applicable and potentially advantageous in quantum information processing. (C) 2016 Elsevier Inc. All rights reserved.
Light-matter interacting quantum systems manifest strong correlations that lead to distinct cooperative spontaneous emissions of subradiance or superradiance. To demonstrate the essence of finite-range correlations in...
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Light-matter interacting quantum systems manifest strong correlations that lead to distinct cooperative spontaneous emissions of subradiance or superradiance. To demonstrate the essence of finite-range correlations in such systems, we consider an atomic array under the resonant dipole-dipole interactions (RDDI) and apply an interpretable machine learning (ML) with the integrated gradients to identify the crossover between the subradiant and superradiant sectors. The machine shows that the next nearest-neighbor (NN) couplings in RDDI play as much as the roles of NN ones in determining the whole eigenspectrum within the training sets. Our results present the advantage of ML approach with explainable ability to reveal the underlying mechanism of correlations in quantum optical systems, which can be potentially applied to investigate many other strongly interacting quantum many-body systems.
The aim of this contribution is to formulate equivalent continuum finite element model for two-dimensional atomic arrays under plane-stress condition, based on Eringen's two phase local/nonlocal model. The interac...
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The aim of this contribution is to formulate equivalent continuum finite element model for two-dimensional atomic arrays under plane-stress condition, based on Eringen's two phase local/nonlocal model. The interaction between the atoms is modelled using translational and rotational linear elastic springs including both nearest and second nearest neighbor relations. Explicit relations between those set of springs and material properties of associated continuum model is looked for by means of equivalency of potential energy stored in atomic bonds and strain energy of continuum. Possibility of reducing computational burden of full atomic models by equivalent continuum models is discussed. This study may be regarded as the first step in composing a partitioned-domain multiscale model;with possibly smoother transition between coarse and fine scales due to the ability of nonlocal continuum model in incorporating long-range interactions. (C) 2019 Elsevier Ltd. All rights reserved.
We consider a balanced fractional 2m factorial design of resolution 2l+1 which permits estimation of all factorial effects up through l-factor interactions under the situation in which all (l+1)-factor and higher orde...
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We consider a balanced fractional 2m factorial design of resolution 2l+1 which permits estimation of all factorial effects up through l-factor interactions under the situation in which all (l+1)-factor and higher order interactions are to be negligible for an integer l satisfying [m/2]array through that of an atomic array. We obtain an explicit expression for the irreducible matrix representation based on the above design and its algebraic properties. The results in this paper will be useful to characterize the designs under consideration.
In Data Structures, sorting is a technique which is used for arranging data in a particular order either ascending or descending. Sorting techniques like Bubble sort, Insertion sort and Selection sort are comparison b...
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ISBN:
(纸本)9781467381734
In Data Structures, sorting is a technique which is used for arranging data in a particular order either ascending or descending. Sorting techniques like Bubble sort, Insertion sort and Selection sort are comparison based. Our proposed technique is a combination of both comparison and counting based techniques. We are finding the exact position of an element and placing it in its corresponding position. A sorting technique is said to be optimal based on its time & space complexity. The algorithm we designed is said to be optimal, based on the number of swap's compared to existing techniques like bubble sort, insertion sort.
The subwavelength array of quantum emitters provides an ideal platform for exploring rich many-body dynamics, such as super- and subradiance. In this paper, we explore the dynamics of spin wave exchange between two di...
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The subwavelength array of quantum emitters provides an ideal platform for exploring rich many-body dynamics, such as super- and subradiance. In this paper, we explore the dynamics of spin wave exchange between two dipole-coupled atomic ring arrays. Subradiant spin waves lead to low-loss and high efficiency of ring-to-ring transfer. The optimal subradiant spin wave exchange occurs at appropriate separations between coplanar rings, despite the fact that the energy transfer efficiency is monotonically enhanced (in the regime <=lambda 0/2 ) as the rings' separation decreases. However, the spin wave will scatter due to the dephasing mechanism of close-by atom pairs, as the separation of two rings is too small. With the increase in the number of atoms on the ring, the subradiant shielding effect also strengthens, leading to a shorter distance for the transfer of spin waves. We investigate the rotation of one of the rings and find that the optimal spin wave exchange corresponds to the scenario where the line connecting the two nearest atoms of the two rings aligns with the center of the circle. Moreover, we study the influence of transition dipole moment orientations on the effective interaction between two atomic rings. We observe that there is a critical point where the effective interaction strength changes dramatically owing to the cooperative effect of the subwavelength atomic array. We believe that our results could be important for quantum information processing based on atomic arrays.
In Data Structures, sorting is a technique which is used for arranging data in a particular order either ascending or descending. Sorting techniques like Bubble sort, Insertion sort and Selection sort are comparison b...
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ISBN:
(纸本)9781467381741
In Data Structures, sorting is a technique which is used for arranging data in a particular order either ascending or descending. Sorting techniques like Bubble sort, Insertion sort and Selection sort are comparison based. Our proposed technique is a combination of both comparison and counting based techniques. We are finding the exact position of an element and placing it in its corresponding position. A sorting technique is said to be optimal based on its time & space complexity. The algorithm we designed is said to be optimal, based on the number of swap's compared to existing techniques like bubble sort, insertion sort.
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