Quantum Gates and Multiparticle Entanglement by Rydberg Excitation Blockade and Adiabatic Passage

2008/02/25 by Ditte Sloth Møller, Ditte Moller, Lars Bojer Madsen +2 · 2 citations
Computer Science · Physics and Astronomy · #Adiabatic process #Atom (system on chip) #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Dipole #Excitation #Excited state #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum entanglement #Quantum gate #Quantum mechanics #Quantum optics and atomic interactions #Rydberg atom #Rydberg formula #quant-ph

paper · pdf · doi:10.1103/physrevlett.100.170504

arxiv created 2008/02/25 · openalex publication_date 2008/04/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We propose to apply stimulated adiabatic passage to transfer atoms from their ground state into Rydberg excited states. Atoms a few micrometers apart experience a dipole-dipole interaction among Rydberg states that is strong enough to shift the atomic resonance and inhibit excitation of more than a single atom. We show that the adiabatic passage in the presence of this interaction between two atoms leads to robust creation of maximally entangled states and to two-bit quantum gates. For many atoms, the excitation blockade leads to an effective implementation of collective-spin and Jaynes-Cummings-like Hamiltonians, and we show that the adiabatic passage can be used to generate collective J_x=0 eigenstates and Greenberger-Horne-Zeilinger states of tens of atoms.

Citations

• Coherent population transfer among quantum states of atoms and molecules
• Interferometric detection of optical phase shifts at the Heisenberg limit
• Entanglement of a Mesoscopic Field with an Atom Induced by Photon Graininess in a Cavity
• Local Blockade of Rydberg Excitation in an Ultracold Gas
• Evidence for Coherent Collective Rydberg Excitation in the Strong Blockade Regime
• Quantal phase factors accompanying adiabatic changes

Cited by

• Preparing Greenberger-Horne-Zeilinger state on ground levels of neutral atoms
• Nonadiabatic noncyclic geometric quantum computation in Rydberg atoms

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• High-fidelity multiqubit gates with Rydberg atoms via level-crossing-free Rapid adiabatic passage