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Deterministic Quantum Teleportation with Atoms

Deterministic Quantum Teleportation with Atoms. M. Riebe, et al. Nature 2004. 1. Outline. 40 Ca + Experimental Implementation Teleportation Algorithm Results, Accuracy Outlook, Quantum Magic?. 2. Implementation. Linear Paul Trap (Nobel Prize 1989). Trapped Ion: 40 Ca +. 3.

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Deterministic Quantum Teleportation with Atoms

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  1. Deterministic Quantum Teleportation with Atoms M. Riebe, et al. Nature 2004 1

  2. Outline 40Ca+ Experimental Implementation Teleportation Algorithm Results, Accuracy Outlook, Quantum Magic? 2

  3. Implementation Linear Paul Trap (Nobel Prize 1989) Trapped Ion: 40Ca+ 3

  4. Implementation Source Ion Receiver Ion Ancillary Ion 4

  5. Algorithm Overview Bell-State analysis Photomulitiplier Tube (Fluoresence) Readout Bell-State preparation Input preparation (beeing teleported), e.g. arb. rotation Undo preparation operation 5

  6. Bell-State Preparation Blue Sideband Transitions Highly Entangled: Bell State Triplet State 6

  7. Bell-State Preparation Entanglement, denoted by R+ 7

  8. Teleportation Step Encoding of input state 8

  9. Bell-State Analyser Controlled Z-Gate: 180 degree phase flip 9

  10. State Detection Readout: Measure joint quantum state Fluoresence 397 nm No Fluoresence Hide/Unhide: Preserve coherence of other qubits 10

  11. Target Ion Reconstruction Results from PMT measurement: Z, X: Reconstruct state in target ion 3: Apply unitary rotation 11

  12. Obtain fidelity Apply inverse of unitary operation Read out teleportated state: resonance fluoresence CCD 12

  13. Results QM: Fidelity up to 75% Classic limit: 66.7% reconstruction operations omitted 13

  14. Results 14

  15. Conclusion Quantum teleportation seems to work in the lab No hidden variables (classical channel necessary) 15

  16. Outlook Processing entangled states in quantum computation Distribution of quantum information between different nodes in network 16

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