Formation of Ultracold Polar Molecules in the Rovibrational Ground State

Deiglmayr, Johannes; Grochola, A.; Repp, M.; Mörtlbauer, K.; Glück, C.; Lange, J.; Dulieu, Olivier; Wester, Roland; Weidemüller, Matthias

doi:10.1103/physrevlett.101.133004

Cited by 567 publications

(654 citation statements)

References 34 publications

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“…A highly promising direction in cold atoms phyiscs is the experimental realization and exploration of homoand heteronuclear molecules at low temperatures [1][2][3][4][5][6][7][8][9]. The potential applications of such systems are wideranging within quantum simulation, information, computation, and metrology [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Formation of classical crystals of dipolar particles in a helical geometry

Pedersen¹,

Fedorov²,

Jensen³

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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We consider crystal formation of particles with dipole-dipole interactions that are confined to move in a one-dimensional helical geometry with their dipole moments oriented along the symmetry axis of the confining helix. The stable classical lowest energy configurations are found to be chain structures for a large range of pitch-to-radius ratios for relatively low density of dipoles and a moderate total number of particles. The classical normal mode spectra support the chain interpretation both through structure and the distinct degeneracies depending discretely on the number of dipoles per revolution. A larger total number of dipoles leads to a clusterization where the dipolar chains move closer to each other. This implies a change in the local density and the emergence of two length scales, one for the cluster size and one for the inter-cluster distance along the helix. Starting from three dipoles per revolution, this implies a breaking of the initial periodicity to form a cluster of two chains close together and a third chain removed from the cluster. This is driven by the competition between in-chain and out-of-chain interactions, or alternatively the side-by-side repulsion and the head-totail attraction in the system. The speed of sound propagates along the chains. It is independent of the number of chains although depending on geometry.

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Section: Introductionmentioning

confidence: 99%

Formation of classical crystals of dipolar particles in a helical geometry

Pedersen¹,

Fedorov²,

Jensen³

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…Cold and ultracold molecules have recently become experimentally accessible [1][2][3][4][5][6][7][8][9] and such systems hold great promise for exploration of quantum systems with longrange and anisotropic interactions with applications to quantum simulation, quantum metrology, and quantum information and computation [10][11][12][13] . However, strong dipolar interactions can induce collapse instabilities 14 as well as strong chemical reaction losses 5 .…”

Section: Introductionmentioning

confidence: 99%

Dipoles on a two-leg ladder

Gammelmark¹,

Zinner²

2013

Phys. Rev. B

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We study polar molecules with long-range dipole-dipole interactions confined to move on a two-leg ladder for different orientations of the molecular dipole moments with respect to the ladder. Matrix product states are employed to calculate the many-body ground state of the system as function of lattice filling fractions, perpendicular hopping between the legs, and dipole interaction strength. We show that the system exhibits zig-zag ordering when the dipolar interactions are predominantly repulsive. As a function of dipole moment orientation with respect to the ladder, we find that there is a critical angle at which ordering disappears. This angle is slightly larger than the angle at which the dipoles are non-interacting along a single leg. This behavior should be observable using current experimental techniques.

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“…For example, the realization of quantum degenerate gases with large magnetic dipole moments [2][3][4][5][6], ongoing efforts to trap and cool polar molecules [7][8][9][10], experiments on Rydberg atoms [11], trapped ions [12,13], and atoms in high finesse optical cavities [14] have opened up the possibility of realizing ultra-cold atomic systems with long-range interactions, such as the anisotropic dipoledipole interaction [15][16][17][18]. Concurrently, better control over experimental parameters and high resolution imaging techniques have introduced new probes for exploring many-body physics, notable among which is the ability to study the dynamics of correlations following a nonadiabatic ramp (quench) of system parameters [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of correlations in a quasi-two-dimensional dipolar Bose gas following a quantum quench

Natu

Campanello²,

Sarma³

2014

Phys. Rev. A

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We study the evolution of correlations in a quasi-2D dipolar gas driven out-of-equilibrium by a sudden ramp of the interactions. On short timescales, roton-like excitations coherently oscillate in and out of the condensate, giving rise to pronounced features in the time-evolution of the momentum distribution, excited fraction and the density-density correlation function. The evolution of these correlation functions following a quench can thus be used to probe the spectrum of the dipolar gas. We also find that density fluctuations induced by the presence of rotons following the quench, dramatically slows down the rate of spreading of correlations in the system: near the roton instability, correlations take infinitely long to build up and show deviations from light-cone like behavior.

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Formation of Ultracold Polar Molecules in the Rovibrational Ground State

Cited by 567 publications

References 34 publications

Formation of classical crystals of dipolar particles in a helical geometry

Formation of classical crystals of dipolar particles in a helical geometry

Dipoles on a two-leg ladder

Dynamics of correlations in a quasi-two-dimensional dipolar Bose gas following a quantum quench

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