Generation of entanglement in spin states of Rydberg atoms by chirped optical pulses

Svetlana A. Malinovskaya*, Elliot Pachniak 

Department of Physics, Stevens Institute of Technology, Castle Point on Hudson, Hoboken 07030, New Jersey, USA

DOI: 10.5185/amlett.2019.9906

Publication Date (Web): Mar 01, 2019

E-mail: smalinov@stevens.edu

Abstract

Quantum entanglement is a crucial resource in many quantum information and quantum communication tasks. In this work, we present a quantum control methodology to create entangled states of two basic classes, the W and the GHZ. A chain of 87Rb atoms in an optical lattice is considered interacting with laser pulses to induce two-photon excitations to Rydberg states having a specific magnetic quantum number. Generation of the W and GHZ three-atomic states is demonstrated via the mechanism of the two-photon adiabatic passage in collective states implying the overlapping chirped pulses and the interplay of the Rabi frequency with the one-photon detuning and the strength of the Rydberg-Rydberg interactions.

Keywords

Many-body physics, entangled states, Rydberg atom, quantum control, chirped laser pulse.

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