Controlled Dicke Subradiance from a Large Cloud of Two-Level Systems

Bienaimé, Tom; Piovella, N.; Kaiser, Robin

doi:10.1103/physrevlett.108.123602

Cited by 159 publications

(167 citation statements)

References 36 publications

(44 reference statements)

Supporting

Mentioning

160

Contrasting

Order By: Relevance

“…But with the advent of giant nonlinearities made possible by electromagnetically included transparency and ultraslow light, we were asked the following question: Can we have phase matching at the single-photon level? Our answer is yes, and this interesting question stimulated much of the recent work on single-photon superradiance, which focuses on collective, virtual, and nonlocal effects [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In particular, in the Dicke model of N two-level (jai and jbi) atoms [16], in a small atomic sample of radius R much less than the radiation wavelength , the symmetric state with only one atom excited,…”

Section: Introductionmentioning

confidence: 99%

Quantum Amplification by Superradiant Emission of Radiation

2013

View full text Add to dashboard Cite

A laser generates light through stimulated emission of radiation and requires population inversion. Quantum interference can yield lasing without inversion. However, such phase-sensitive quantum amplification still requires some atomic population in the excited state. Here, we present a new kind of quantum amplifier based on collective superradiant emission which does not need any population in the excited state. We show that parametric resonance between the driving (e.g., infrared) field and collective superradiant oscillations of the atomic polarization can yield light amplification at high (e.g., XUV) frequencies. To achieve gain, one must suppress a time-dependent Stark shift caused by the driving field. The resulting superradiant amplifier is many orders of magnitude more efficient than the usual nonlinear multiphoton excitation and holds promise for a new kind of generator of highfrequency coherent radiation. In addition to a detailed analytical analysis, confirmed by numerical simulations, we provide a physically appealing explanation of the quantum amplification by superradiant emission of radiation (QASER) operation in terms of coupled classical oscillators. We also present an experiment that demonstrates the QASER amplification mechanism in an electronic circuit, which, to the best of our knowledge, is the first experimental demonstration of the difference combination resonance.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantum Amplification by Superradiant Emission of Radiation

2013

View full text Add to dashboard Cite

show abstract

“…In the single excitation case, following the adiabatic elimination of the photonic modes, the dynamics of the system (no-jump evolution in the master equation [25]) can be described by the following non-Hermitian spin Hamiltonian [17,[26][27][28][29] …”

mentioning

confidence: 99%

Topological Quantum Optics in Two-Dimensional Atomic Arrays

et al. 2017

View full text Add to dashboard Cite

We demonstrate that two-dimensional atomic emitter arrays with subwavelength spacing constitute topologically protected quantum optical systems where the photon propagation is robust against large imperfections while losses associated with free space emission are strongly suppressed. Breaking timereversal symmetry with a magnetic field results in gapped photonic bands with nontrivial Chern numbers and topologically protected, long-lived edge states. Due to the inherent nonlinearity of constituent emitters, such systems provide a platform for exploring quantum optical analogs of interacting topological systems. DOI: 10.1103/PhysRevLett.119.023603 Charged particles in two-dimensional systems exhibit exotic macroscopic behavior in the presence of magnetic fields and interactions. These include the integer [1], fractional [2], and spin [3] quantum Hall effects. Such systems support topologically protected edge states [4,5] that are robust against defects and disorder. There is a significant interest in realizing topologically protected photonic systems. Photonic analogs of quantum Hall behavior have been studied in gyromagnetic photonic crystals [6][7][8][9][10][11], helical waveguides [12], two-dimensional lattices of optical resonators [13][14][15] and in polaritons coupled to optical cavities [16]. An outstanding challenge is to realize optical systems which are robust not only to some specific backscattering processes but to all loss processes, including scattering into unconfined modes and spontaneous emission. Another challenge is to extend these effects into a nonlinear quantum domain with strong interactions between individual excitations. These considerations motivate the search for new approaches to topological photonics.In this Letter, we introduce and analyze a novel platform for engineering topological states in the optical domain. It is based on atomic or atomlike quantum optical systems [17], where time-reversal symmetry can be broken by applying magnetic fields and the constituent emitters are inherently nonlinear. Specifically, we focus on optical excitations in a two-dimensional honeycomb array of closely spaced emitters. We show that such systems maintain topologically protected confined optical modes that are immune to large imperfections as well as to the most common loss processes such as scattering into free-space modes. Such modes can be used to control individual atom emission, and to create quantum nonlinearity at a single photon level.The key idea is illustrated in Fig. 1(a). We envision an array with interatomic spacing a and quantization axisẑ

show abstract

“…In such a general dynamical scenario the increasing attention to the existence in some bipartite systems of subradiant states that are selected pure factorized states which evolve, keeping the system in its fully initial decorrelated condition at any time instant, is not surprising. Such peculiar behavior, of both fundamental [1,2] and applicative interest [3][4][5][6][7][8], results from quantum interference effects canceling in the evolved state, at a generic time instant, exactly those contributions, stemming from the superposition principle, which, otherwise, would determine the onset and possibly the persistence of correlation manifestations between A and B. Subradiance is a cooperative effect that has been investigated both theoretically [1,2,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] and experimentally [4,[27][28][29][30][31][32] following the seminal paper by Dicke [1], mainly in radiation-matter systems, where it describes optically inactive states of an atomic ensemble (A) in an electromagnetic environment (B). The current upsurge of interest in these states reflects, indeed, the existence of many other physical contexts where this phenomenon may find promising applications [4,[33][34]…”

Section: Introductionmentioning

confidence: 99%

Interaction-free evolving states of a bipartite system

Guccione¹,

Messina

Napoli³

et al. 2014

Phys. Rev. A

View full text Add to dashboard Cite

We show that two interacting physical systems may admit entangled pure or nonseparable mixed states evolving in time as if the mutual interaction Hamiltonian were absent. In this paper we define these interaction-free evolving (IFE) states and characterize their existence for a generic binary system described by a time-independent Hamiltonian. A comparison between IFE subspace and the decoherence-free subspace is reported. The set of all pure IFE states is explicitly constructed for a nonhomogeneous spin-star-system model

show abstract

Controlled Dicke Subradiance from a Large Cloud of Two-Level Systems

Cited by 159 publications

References 36 publications

Quantum Amplification by Superradiant Emission of Radiation

Quantum Amplification by Superradiant Emission of Radiation

Topological Quantum Optics in Two-Dimensional Atomic Arrays

Interaction-free evolving states of a bipartite system

Contact Info

Product

Resources

About