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Showing 1–11 of 11 results
Advanced filters: Author: T. Monz Clear advanced filters

  • Experimentally verifying that quantum states are indeed entangled is not always straightforward. With the recently proposed device-independent entanglement witnesses, genuine multiparticle entanglement of six ions has now been demonstrated.

    • Julio T. Barreiro
    • Jean-Daniel Bancal
    • Rainer Blatt
    Research
    Nature Physics
    Volume: 9, P: 559-562

  • A method for achieving fully tunable entanglement between a single 40Ca+ ion and the polarization state of a single photon within an optical resonator is reported, providing a promising means of distributing information within quantum networks.

    • A. Stute
    • B. Casabone
    • R. Blatt
    Research
    Nature
    Volume: 485, P: 482-485

  • A noisy environment is used to study the dynamics of a four-trapped-ion entangled state. The study shows that entanglement properties such as distillability and separability can be altered by controlling the degree of dephasing. The results provide an important insight into the nature of multiparticle entanglement.

    • Julio T. Barreiro
    • Philipp Schindler
    • Rainer Blatt
    Research
    Nature Physics
    Volume: 6, P: 943-946

  • Quantum compressed sensing can provide a scalable way to characterize quantum states and devices, but has been so far limited to states with quickly decaying eigenvalues. Here the authors show that it can be appropriate even in the general case, demonstrating reconstruction the state of a seven-qubit system.

    • C. A. Riofrío
    • D. Gross
    • J. Eisert
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8

  • Entanglement swapping—a protocol for entangling remote quantum systems without the requirement of direct interaction between them—has been implemented in a completely deterministic fashion, allowing to prepare well-defined entangled states on demand.

    • M. Riebe
    • T. Monz
    • R. Blatt
    Research
    Nature Physics
    Volume: 4, P: 839-842

  • Dynamical maps are well known in the context of classical nonlinear dynamics and chaos theory. A trapped-ion quantum simulator can be used to study the generalized version of dynamical maps for many-body dissipative quantum systems.

    • P. Schindler
    • M. Müller
    • R. Blatt
    Research
    Nature Physics
    Volume: 9, P: 361-367

  • Impressive progress has been achieved in isolating quantum systems from the environment and coherently controlling their dynamics. However, engineering the dynamics of many particles by a controlled coupling to an environment (in an 'open' quantum system) remains largely unexplored. Here, an approach is demonstrated based on ion-trap technology for simulating an open quantum system with up to five qubits. By adding controlled dissipation to coherent operations, the work offers novel prospects for open-system quantum simulation and computation.

    • Julio T. Barreiro
    • Markus Müller
    • Rainer Blatt
    Research
    Nature
    Volume: 470, P: 486-491

  • Researchers demonstrate deterministic quantum-state transfer from a 40Ca+ ion to a photon in an optical cavity by controlling the transition probabilities and the frequency difference of two simultaneous Raman fields. They used process tomography to characterize the quantum-state transfer, providing a process fidelity of 92% and a state-transfer efficiency of 16%.

    • A. Stute
    • B. Casabone
    • R. Blatt
    Research
    Nature Photonics
    Volume: 7, P: 219-222

  • A protocol for the reliable, efficient and precise characterization of quantum noise is reported and implemented in an architecture consisting of 14 superconducting qubits. Correlated noise within arbitrary sets of qubits can be easily detected.

    • Robin Harper
    • Steven T. Flammia
    • Joel J. Wallman
    Research
    Nature Physics
    Volume: 16, P: 1184-1188