### Abstract

Rydberg atoms have experimentally interestingproperties such as strong long-range Van der Waals interactions and the dipole blockade effect. In optical lattices the blockade effect ensures that only one Rydberg excitation per site is allowed, effectively creating a Rydberg crystal. We theoretically show that it is also possible for a one-dimensional Rydberg crystal to spontaneously form in a random ensemble of atoms, e.g. a magneto-optical trap. This is done using an

existing Monte Carlo model [1] to simulate the excitation dynamics inside the intersection of two lasers for a two-step excitation scheme. With a blue-detuned laser for the upper transition, the first Rydberg excitation will occur after a relatively long time. That first Rydberg atom will then seed further Rydberg excitations, as the blockade effect shifts atoms at a certain distance into

resonance. If two dimensions of the laser intersection are smaller than the blockade radius, a one-dimensional Rydberg crystal will form.

existing Monte Carlo model [1] to simulate the excitation dynamics inside the intersection of two lasers for a two-step excitation scheme. With a blue-detuned laser for the upper transition, the first Rydberg excitation will occur after a relatively long time. That first Rydberg atom will then seed further Rydberg excitations, as the blockade effect shifts atoms at a certain distance into

resonance. If two dimensions of the laser intersection are smaller than the blockade radius, a one-dimensional Rydberg crystal will form.

Original language | English |
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Pages | 64-64 |

Number of pages | 1 |

Publication status | Published - 11 Oct 2016 |

Event | 40th Annual Meeting of the section Atomic Molecular and Optical Physics - Conference Center De Werelt , Lunteren, Netherlands Duration: 11 Oct 2016 → 12 Oct 2016 Conference number: 40 |

### Conference

Conference | 40th Annual Meeting of the section Atomic Molecular and Optical Physics |
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Country | Netherlands |

City | Lunteren |

Period | 11/10/16 → 12/10/16 |

### Bibliographical note

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## Cite this

van der Weerden, T. H. P., Kokkelmans, S. J. J. M. F., & Vredenbregt, E. J. D. (2016).

*Spontaneous formation of one-dimensional Rydberg crystals in an ultracold gas*. 64-64. Poster session presented at 40th Annual Meeting of the section Atomic Molecular and Optical Physics, Lunteren, Netherlands.