
Media coverage of our teleportation paper
Our most recent Nature paper has attracted media coverage all around the world. Below you can find a list of the most important coverages: ORF
Quantum Simulations are key for the investigation of quantum mechanical properties. By using a well controlled quantum mechanical system one can implement and study tailored Hamiltonians and unlock new types of matter.
During my PhD thesis work in the group of Prof. Francesca Ferlaino I used the toolbox of lattice-confined dipolar atoms to perform Quantum Simulations of exotic inter-atom interactions that extend across neighboring lattice sites.
The realization of quantum networks requires versatile quantum network nodes to distribute entanglement across the network and to store it for further processing.
As an Erwin-Schrödinger fellow at QuTech, TU Delft, together with a team led by Prof. Ronald Hanson, we have build the first quantum network exceeding two quantum network nodes – a crucial step to realize a future Quantum Internet.
Cavity coupled trapped ions are a promising platform to realize long-range quantum networks due to their superior spin-photon coupling efficiencies and entanglement fidelities, and a communication wavelength compatible for high efficient conversion to telecom frequencies.
In 2020 I have joined the group of Prof. Tracy Northup within my Erwin-Schrödinger fellowship to bring the vision of a long-distance Quantum Network further ahead.
Our most recent Nature paper has attracted media coverage all around the world. Below you can find a list of the most important coverages: ORF
At QuTech (Delft University of Technology) we have succeeded in teleporting quantum information across a rudimentary network – between network nodes that do not share
The Tsinghua University has invited me to give a seminar on recent advances on Quantum Networks within the Quantum Internet Alliance in Europe at the
Patscheider, A.; Chomaz, L.; Natale, G.; Petter, D.; Mark, M. J.; Baier, S.; Yang, B.; Wang, R. R. W.; Bohn, J. L.; Ferlaino, F.
Determination of the scattering length of erbium atoms Artikel
In: Phys. Rev. A, Bd. 105, Ausg. 6, S. 063307, 2022.
@article{Patscheider_ScattLen_2022,
title = {Determination of the scattering length of erbium atoms},
author = {A. Patscheider and L. Chomaz and G. Natale and D. Petter and M. J. Mark and S. Baier and B. Yang and R. R. W. Wang and J. L. Bohn and F. Ferlaino},
url = {https://link.aps.org/doi/10.1103/PhysRevA.105.063307},
doi = {10.1103/PhysRevA.105.063307},
year = {2022},
date = {2022-06-08},
urldate = {2022-06-01},
journal = {Phys. Rev. A},
volume = {105},
issue = {6},
pages = {063307},
publisher = {American Physical Society},
abstract = {An accurate knowledge of the scattering length is fundamental in ultracold quantum gas experiments and essential for the characterisation of the system as well as for a meaningful comparison to theoretical models. Here, we perform a careful characterisation of the s-wave scattering length a_s for the four highest-abundance isotopes of erbium, in the magnetic field range from 0G to 5G. We report on cross-dimensional thermalization measurements and apply the Enskog equations of change to numerically simulate the thermalization process and to analytically extract an expression for the so-called number of collisions per re-thermalization (NCPR) to obtain a_s from our experimental data. We benchmark the applied cross-dimensional thermalization technique with the experimentally more demanding lattice modulation spectroscopy and find good agreement for our parameter regime. Our experiments are compatible with a dependence of the NCPR with a_s, as theoretically expected in the case of strongly dipolar gases. Surprisingly, we experimentally observe a dependency of the NCPR on the density, which might arise due to deviations from an ideal harmonic trapping configuration. Finally, we apply a model for the dependency of the background scattering length with the isotope mass, allowing to estimate the number of bound states of erbium.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Hermans, S. L. N.; Pompili, M.; Beukers, H. K. C.; Baier, S.; Borregaard, J.; Hanson, R.
Qubit teleportation between non-neighbouring nodes in a quantum network Artikel
In: Nature, Bd. 605, Nr. 7911, S. 663-668, 2022, ISSN: 1476-4687.
@article{Hermans_Teleport_2022,
title = {Qubit teleportation between non-neighbouring nodes in a quantum network},
author = {S. L. N. Hermans and M. Pompili and H. K. C. Beukers and S. Baier and J. Borregaard and R. Hanson},
url = {https://doi.org/10.1038/s41586-022-04697-y},
doi = {10.1038/s41586-022-04697-y},
issn = {1476-4687},
year = {2022},
date = {2022-05-25},
urldate = {2022-05-25},
journal = {Nature},
volume = {605},
number = {7911},
pages = {663-668},
abstract = {Future quantum internet applications will derive their power from the ability to share quantum information across the network. Quantum teleportation allows for the reliable transfer of quantum information between distant nodes, even in the presence of highly lossy network connections. Although many experimental demonstrations have been performed on different quantum network platforms, moving beyond directly connected nodes has, so far, been hindered by the demanding requirements on the pre-shared remote entanglement, joint qubit readout and coherence times. Here we realize quantum teleportation between remote, non-neighbouring nodes in a quantum network. The network uses three optically connected nodes based on solid-state spin qubits. The teleporter is prepared by establishing remote entanglement on the two links, followed by entanglement swapping on the middle node and storage in a memory qubit. We demonstrate that, once successful preparation of the teleporter is heralded, arbitrary qubit states can be teleported with fidelity above the classical bound, even with unit efficiency. These results are enabled by key innovations in the qubit readout procedure, active memory qubit protection during entanglement generation and tailored heralding that reduces remote entanglement infidelities. Our work demonstrates a prime building block for future quantum networks and opens the door to exploring teleportation-based multi-node protocols and applications.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bradley, C. E.; Bone, S. W.; Moller, P. F. W.; Baier, S.; Degen, M. J.; Loenen, S. J. H.; Bartling, H. P.; Markham, M.; Twitchen, D. J.; Hanson, R.; Elkouss, D.; Taminiau, T. H.
Robust quantum-network memory based on spin qubits in isotopically engineered diamond Artikel
In: arXiv, Bd. arXiv:2111.09722, 2021.
@article{Bradley_Memory_2021,
title = {Robust quantum-network memory based on spin qubits in isotopically engineered diamond},
author = {C. E. Bradley and S. W. Bone and P. F. W. Moller and S. Baier and M. J. Degen and S. J. H. Loenen and H. P. Bartling and M. Markham and D. J. Twitchen and R. Hanson and D. Elkouss and T. H. Taminiau},
url = {https://arxiv.org/abs/2111.09772},
year = {2021},
date = {2021-11-18},
urldate = {2021-11-18},
journal = {arXiv},
volume = {arXiv:2111.09722},
abstract = {Quantum networks can enable long-range quantum communication and modular quantum computation. A powerful approach is to use multi-qubit network nodes which provide the quantum memory and computational power to perform entanglement distillation, quantum error correction, and information processing. Nuclear spins associated with optically-active defects in diamond are promising qubits for this role. However, their dephasing during entanglement distribution across the optical network hinders scaling to larger systems. In this work, we show that a single 13C spin in isotopically engineered diamond offers a long-lived quantum memory that is robust to the optical link operation of an NV centre. The memory lifetime is improved by two orders-of-magnitude upon the state-of-the-art, and exceeds the best reported times for remote entanglement generation. We identify ionisation of the NV centre as a newly limiting decoherence mechanism. As a first step towards overcoming this limitation, we demonstrate that the nuclear spin state can be retrieved with high fidelity after a complete cycle of ionisation and recapture. Finally, we use numerical simulations to show that the combination of this improved memory lifetime with previously demonstrated entanglement links and gate operations can enable key primitives for quantum networks, such as deterministic non-local two-qubit logic operations and GHZ state creation across four network nodes. Our results pave the way for test-bed quantum networks capable of investigating complex algorithms and error correction.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Pompili*, M.; Hermans*, S. L. N.; Baier*, S.; Beukers, H. K. C.; Humphreys, P. C.; Schouten, R. N.; Vermeulen, R. F. L.; Tiggelman, M. J.; Martins, L. Santos; Dirkse, B.; Wehner, S.; Hanson, R.; *equal contribution,
Realization of a multinode quantum network of remote solid-state qubits Artikel
In: Science, Bd. 372, Nr. 6539, S. 259–264, 2021, ISSN: 0036-8075.
@article{Pompili259,
title = {Realization of a multinode quantum network of remote solid-state qubits},
author = {M. Pompili* and S. L. N. Hermans* and S. Baier* and H. K. C. Beukers and P. C. Humphreys and R. N. Schouten and R. F. L. Vermeulen and M. J. Tiggelman and L. Santos Martins and B. Dirkse and S. Wehner and R. Hanson and *equal contribution},
url = {https://science.sciencemag.org/content/372/6539/259},
doi = {10.1126/science.abg1919},
issn = {0036-8075},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {Science},
volume = {372},
number = {6539},
pages = {259--264},
publisher = {American Association for the Advancement of Science},
abstract = {Future quantum networks will provide the means to develop truly secure communication channels and will have applications in many other quantum-based technologies. In this work we present a three-node remote quantum network based on solid-state spin qubits (nitrogen-vacancy centers in diamond) coupled by photons. The implementation of two quantum protocols on the network. entanglement distribution and entanglement swapping, illustrates a key platform for exploring, testing, and developing multinode quantum networks and quantum protocols.
},
keywords = {},
pubstate = {published},
tppubtype = {article}
}