Non-Abelian geometric quantum memory with an atomic ensemble

Journal Article · Wed Sep 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.032330· OSTI ID:20646035

Li, Y ^[1]; Zhang, P; Sun, C P ^[2]; Zanardi, P ^[3]

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1. Interdisciplinary Center of Theoretical Studies, Chinese Academy of Sciences, Beijing, 100080 (China)
2. Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080 (China)
3. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

We study a quantum information storage scheme based on an atomic ensemble with near (also exact) three-photon resonance electromagnetically induced transparency (EIT). Each 4-level-atom is coupled to two classical control fields and a quantum probe field. Quantum information is adiabatically stored in the associated dark polariton manifold. An intrinsic nontrivial topological structure is discovered in our quantum memory implemented through the symmetric collective atomic excitations with a hidden SU(3) dynamical symmetry. By adiabatically changing the Rabi frequencies of two classical control fields, the quantum state can be retrieved up to a non-Abelian holonomy and thus decoded from the final state in a purely geometric way.

• OSTI ID: 20646035
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CONTROL
EXCITATION
INFORMATION THEORY
MULTI-PHOTON PROCESSES
OPACITY
OPTICS
PHOTONS
QUANTUM MECHANICS
RESONANCE
SU-3 GROUPS
SYMMETRY
TOPOLOGY