Microwave control of Rydberg atom interactions

Sevinçli, S.; Pohl, Thomas

doi:10.1088/1367-2630/16/12/123036

Cited by 41 publications

(31 citation statements)

References 56 publications

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“…A case currently much less studied is when long-range interactions feature competing attraction and repulsion. Systems with such interactions are known to exhibit intricate behavior and in fact appear in a number of contexts, e.g., Langmuir monolayers [13], classical fluids [14,15], mixtures of colloids and polymers [16,17] and ferrofluids [18].In this work we explore such scenario in a cold atomic lattice gas in which interatomic interactions are controlled via a so-called double Rydberg dressing scheme [19][20][21]. This permits the realization of competing…”

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“…In this work we explore such scenario in a cold atomic lattice gas in which interatomic interactions are controlled via a so-called double Rydberg dressing scheme [19][20][21]. This permits the realization of competing nearest-neighbor (NN) attractive and long-range repulsive interactions which can stabilize generalized Wigner The |1 state is weakly dressed to two Rydberg states |R1 and |R2 by a blue-and red-detuned lasers.…”

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Emergent Devil’s Staircase without Particle-Hole Symmetry in Rydberg Quantum Gases with Competing Attractive and Repulsive Interactions

et al. 2015

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The devil's staircase is a fractal structure that characterizes the ground state of one-dimensional classical lattice gases with long-range repulsive convex interactions. Its plateaus mark regions of stability for specific filling fractions which are controlled by a chemical potential. Typically such staircase has an explicit particle-hole symmetry, i.e., the staircase at more than half-filling can be trivially extracted from the one at less than half filling by exchanging the roles of holes and particles. Here we introduce a quantum spin chain with competing short-range attractive and long-range repulsive interactions, i.e. a non-convex potential. In the classical limit the ground state features generalized Wigner crystals that -depending on the filling fraction -are either composed of dimer particles or dimer holes which results in an emergent complete devil's staircase without explicit particle-hole symmetry of the underlying microscopic model. In our system the particle-hole symmetry is lifted due to the fact that the staircase is controlled through a two-body interaction rather than a one-body chemical potential. The introduction of quantum fluctuations through a transverse field melts the staircase and ultimately makes the system enter a paramagnetic phase. For intermediate transverse field strengths, however, we identify a region, where the density-density correlations suggest the emergence of quasi long-range order. We discuss how this physics can be explored with Rydberg-dressed atoms held in a lattice.Introduction.-Systems with long-range interactions can feature intriguing physics that is not necessarily present in their short-range counterparts. For example, classical particles in a one-dimensional (1D) lattice interacting via repulsive infinite-range convex potentials lower their interaction energy by assuming a distribution in space as uniform as possible. Remarkably this property makes the ground state configuration independent of the actual details of the interactions, e.g. the specific power-law of the interaction potential, and leads to the formation of a so-called generalized Wigner crystal [1,2]. Furthermore, the permitted filling fractions of the ground state configuration versus the chemical potential form a fractal curve known as the complete devil's staircase [3].Recent years have seen a great success in emulating many-body systems with long-range interactions using ultracold gases. Here, crystalline structures which were originally studied in the context of solid state physics have shown to be present also in ensembles of cold trapped ions [4], polar molecules [5][6][7] and gases of Rydberg atoms [8][9][10][11]. In particular Rydberg gases have witnessed a recent experimental breakthrough in which the adiabatic preparation of a crystalline state and the onset of a staircase structure were shown [12]. A case currently much less studied is when long-range interactions feature competing attraction and repulsion. Systems with such interactions are known to exhibit intricate behavior and in f...

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Emergent Devil’s Staircase without Particle-Hole Symmetry in Rydberg Quantum Gases with Competing Attractive and Repulsive Interactions

et al. 2015

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“…When Rydberg atoms are dressed with microwave fields (Sevincli and Pohl, 2014), the resulting atom-field and atom-atom interactions give rise to new phenomena, such as strong dipolar interactions (Park et al, 2011), EIT resonances (Petrosyan et al, 2011), and strong atom-photon interactions (Paredes-Barato and Adams, 2014; Tiarks et al, 2014). These new interactions may also be useful in preparing UNPs.…”

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Ultracold Neutral Plasmas Well into the Strongly Coupled Regime

Murillo¹,

Bergeson²

2015

Advances in Atomic, Molecular, and Optical Physics

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“…Theory: effective dynamics in the limit of strong dissipation We consider a system of N atoms, each of which can be in one of + p 1 levels, the ground state ñ |0 , and > p 1 C ss depends on the specific structure of the atomic spectrum and can be controlled through e.g. electric field induced Förster resonances [40] or microwave dressing [41,42]. Typically encountered exponents are a = 6 (van der Waals interaction) and a = 3 (dipole-dipole interaction) [43].…”

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Non-equilibrium fluctuations and metastability arising from non-additive interactions in dissipative multi-component Rydberg gases

2016

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We study the out-of-equilibrium dynamics of dissipative gases of atoms excited to two or more highlying Rydberg states. This situation bears interesting similarities to classical binary (in general p-ary) mixtures of particles. The effective forces between the components are determined by the inter-level and intra-level interactions of Rydberg atoms. These systems permit to explore new parameter regimes which are physically inaccessible in a classical setting, for example one in which the mixtures exhibit non-additive interactions. In this situation the out-of-equilibrium evolution is characterized by the formation of metastable domains that reach partial equilibration long before the attainment of stationarity. In experimental settings with mesoscopic sizes, this collective behavior may in fact take the appearance of dynamic symmetry breaking.

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Microwave control of Rydberg atom interactions

Cited by 41 publications

References 56 publications

Emergent Devil’s Staircase without Particle-Hole Symmetry in Rydberg Quantum Gases with Competing Attractive and Repulsive Interactions

Emergent Devil’s Staircase without Particle-Hole Symmetry in Rydberg Quantum Gases with Competing Attractive and Repulsive Interactions

Ultracold Neutral Plasmas Well into the Strongly Coupled Regime

Non-equilibrium fluctuations and metastability arising from non-additive interactions in dissipative multi-component Rydberg gases

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