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Surface mass balance and climate of the Last Glacial Maximum Northern Hemisphere ice sheets: simulations with CESM2.1

Bradley, Sarah L. (author), Sellevold, R. (author), Petrini, M. (author), Vizcaino, M. (author), Georgiou, S. (author), Zhu, Jiang (author), Otto-Bliesner, Bette L. (author), Lofverstrom, Marcus (author)

The Last Glacial Maximum (LGM, from ∼26 to 20 ka BP) was the most recent period with large ice sheets in Eurasia and North America. At that time, global temperatures were 5–7 ∘C lower than today, and sea level ∼125 m lower. LGM simulations are useful to understand earth system dynamics, including climate–ice sheet interactions, and to evaluate...

journal article 2024

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Mapping a 50-spin-qubit network through correlated sensing

van de Stolpe, G.L. (author), Kwiatkowski, D.P. (author), Bradley, C.E. (author), Randall, J.A.D. (author), Abobeih, M.H.M.A. (author), Breitweiser, S. A. (author), Bassett, L. C. (author), Markham, M. (author), Twitchen, D. J. (author), Taminiau, T.H. (author)

Spins associated to optically accessible solid-state defects have emerged as a versatile platform for exploring quantum simulation, quantum sensing and quantum communication. Pioneering experiments have shown the sensing, imaging, and control of multiple nuclear spins surrounding a single electron spin defect. However, the accessible size of...

journal article 2024

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Reassessing tin circularity and criticality

Bradley, J.E. (author), Auping, Willem L. (author), Kleijn, René (author), Kwakkel, J.H. (author), Sprecher, Benjamin (author)

Tin is an important metal for society with a high risk of supply disruptions. It is, therefore, classified as a critical material in many parts of the world. An exception is the European Union, for which tin was classified as a non-critical material in 2023. However, there are many discrepancies in the literature regarding the definitions and...

journal article 2024

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Robust quantum-network memory based on spin qubits in isotopically engineered diamond

Bradley, C.E. (author), de Bone, S.W. (author), Möller, P. F.W. (author), Baier, S. (author), Degen, M.J. (author), Loenen, S.J.H. (author), Bartling, H.P. (author), Hanson, R. (author), Elkouss Coronas, D. (author), Taminiau, T.H. (author)

Quantum networks can enable quantum communication and modular quantum computation. A powerful approach is to use multi-qubit nodes that provide quantum memory and computational power. Nuclear spins associated with defects in diamond are promising qubits for this role. However, dephasing during optical entanglement distribution hinders scaling...

journal article 2022

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Fault-tolerant operation of a logical qubit in a diamond quantum processor

Abobeih, M.H.M.A. (author), Wang, Y. (author), Randall, J.A.D. (author), Loenen, S.J.H. (author), Bradley, C.E. (author), Markham, M. (author), Twitchen, D. J. (author), Terhal, B.M. (author), Taminiau, T.H. (author)

Solid-state spin qubits is a promising platform for quantum computation and quantum networks^1,2. Recent experiments have demonstrated high-quality control over multi-qubit systems^3–8, elementary quantum algorithms^8–11 and non-fault-tolerant error correction^12–14. Large-scale systems will require...

journal article 2022

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Telecom-Band Quantum Interference of Frequency-Converted Photons from Remote Detuned NV Centers

Stolk, A.J. (author), van der Enden, K.L. (author), Röhsner, M. (author), Teepe, A. (author), Faes, S. O.F. (author), Bradley, C.E. (author), Cadot, S.P.A. (author), van Rantwijk, J.F. (author), te Raa, I. (author), Hagen, R.A.J. (author), Verlaan, A. L. (author), Biemond, J.J.B. (author), Khorev, A. (author), Vollmer, R. (author), Morits, J.P.J. (author), Taminiau, T.H. (author), van Zwet, E.J. (author), Hanson, R. (author)

Entanglement distribution over quantum networks has the promise of realizing fundamentally new technologies. Entanglement between separated quantum processing nodes has been achieved on several experimental platforms in the past decade. To move toward metropolitan-scale quantum network test beds, the creation and transmission of...

journal article 2022

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Entanglement of Spin-Pair Qubits with Intrinsic Dephasing Times Exceeding a Minute

Bartling, H.P. (author), Abobeih, M.H.M.A. (author), Pingault, B.J. (author), Degen, M.J. (author), Loenen, S.J.H. (author), Bradley, C.E. (author), Randall, J.A.D. (author), Markham, M. (author), Twitchen, D. J. (author), Taminiau, T.H. (author)

Understanding and protecting the coherence of individual quantum systems is a central challenge in quantum science and technology. Over the past decades, a rich variety of methods to extend coherence have been developed. A complementary approach is to look for naturally occurring systems that are inherently protected against decoherence. Here...

journal article 2022

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Order from Disorder: Control of Multi-Qubit Spin Registers in Diamond

Bradley, C.E. (author)

Electron spin qubits associated with individual solid-state defects can exhibit exceptional coherence and bright optical interfaces. Furthermore, their magnetic interactions with nuclear spins in the host material present a resource for multi-qubit registers. They have thus emerged as powerful systems with which to develop quantum technologies....

doctoral thesis 2021

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Entanglement of dark electron-nuclear spin defects in diamond

Degen, M.J. (author), Loenen, S.J.H. (author), Bartling, H.P. (author), Bradley, C.E. (author), Meinsma, A.L. (author), Markham, M. (author), Twitchen, D. J. (author), Taminiau, T.H. (author)

A promising approach for multi-qubit quantum registers is to use optically addressable spins to control multiple dark electron-spin defects in the environment. While recent experiments have observed signatures of coherent interactions with such dark spins, it is an open challenge to realize the individual control required for quantum...

journal article 2021

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Greenland Ice Sheet Contribution to 21st Century Sea Level Rise as Simulated by the Coupled CESM2.1-CISM2.1

Muntjewerf, L. (author), Petrini, M. (author), Vizcaino, M. (author), Ernani da Silva, C. (author), Sellevold, R. (author), Scherrenberg, Meike D.W. (author), Thayer-Calder, Katherine (author), Bradley, Sarah L. (author), Lenaerts, Jan T.M. (author)

The Greenland Ice Sheet (GrIS) mass balance is examined with an Earth system/ice sheet model that interactively couples the GrIS to the broader Earth system. The simulation runs from 1850 to 2100, with historical and SSP5-8.5 forcing. By the mid-21st century, the cumulative GrIS contribution to global mean sea level rise (SLR) is 23 mm....

journal article 2020

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Dynamic clonal hematopoiesis and functional T-cell immunity in a supercentenarian

van den Akker, E.B. (author), Makrodimitris, S. (author), Hulsman, M. (author), Brugman, Martijn H. (author), Nikolic, Tatjana (author), Bradley, Ted (author), Waisfisz, Quinten (author), Baas, Frank (author), Reinders, M.J.T. (author), Holstege, H. (author)

journal article 2020

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An Efficient Ice Sheet/Earth System Model Spin-up Procedure for CESM2-CISM2: Description, Evaluation, and Broader Applicability

Lofverstrom, Marcus (author), Fyke, Jeremy G. (author), Thayer-Calder, Katherine (author), Muntjewerf, L. (author), Vizcaino, M. (author), Sacks, William J. (author), Lipscomb, William H. (author), Otto-Bliesner, Bette L. (author), Bradley, S.L. (author)

Spinning up a highly complex, coupled Earth system model (ESM) is a time consuming and computationally demanding exercise. For models with interactive ice sheet components, this becomes a major challenge, as ice sheets are sensitive to bidirectional feedback processes and equilibrate over glacial timescales of up to many millennia. This work...

journal article 2020

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Accelerated Greenland Ice Sheet Mass Loss Under High Greenhouse Gas Forcing as Simulated by the Coupled CESM2.1-CISM2.1

Muntjewerf, L. (author), Sellevold, R. (author), Vizcaino, M. (author), Ernani da Silva, C. (author), Petrini, M. (author), Thayer-Calder, Katherine (author), Scherrenberg, Meike D.W. (author), Bradley, S.L. (author), Katsman, C.A. (author), Fyke, Jeremy (author), Lipscomb, William H. (author), Lofverstrom, Marcus (author), Sacks, William J. (author)

The Greenland ice sheet (GrIS) is now losing mass at a rate of 0.7 mm of sea level rise (SLR) per year. Here we explore future GrIS evolution and interactions with global and regional climate under high greenhouse gas forcing with the Community Earth System Model version 2.1 (CESM2.1), which includes an interactive ice sheet component (the...

journal article 2020

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Orbital and Spin Dynamics of Single Neutrally-Charged Nitrogen-Vacancy Centers in Diamond

Baier, S. (author), Bradley, C.E. (author), Middelburg, T. (author), Dobrovitski, V.V. (author), Taminiau, T.H. (author), Hanson, R. (author)

The neutral charge state plays an important role in quantum information and sensing applications basedon nitrogen-vacancy centers. However, the orbital and spin dynamics remain unexplored. Here, we useresonant excitation of single centers to directly reveal the fine structure, enabling selective addressing ofspin-orbit states. Through pump-probe...

journal article 2020

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Synthetic Polymers Provide a Robust Substrate for Functional Neuron Culture

Zhang, Yichuan (author), Venkateswaran, Seshasailam (author), Higuera, Gustavo A. (author), Nath, Suvra (author), Shpak, Guy (author), Matray, Jeffrey (author), Fratila-Apachitei, E.L. (author), Zadpoor, A.A. (author), Kushner, Steven A. (author), Bradley, Mark (author), De Zeeuw, Chris I. (author)

Substrates for neuron culture and implantation are required to be both biocompatible and display surface compositions that support cell attachment, growth, differentiation, and neural activity. Laminin, a naturally occurring extracellular matrix protein is the most widely used substrate for neuron culture and fulfills some of these...

journal article 2020

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Future evolution of the Greenland Ice Sheet in a coupled climate and ice sheet model: CESM2.1-CISM2.1 contribution to ISMIP6

Muntjewerf, L. (author), Lipscomb, William (author), Thayer-Calder, Kate (author), Bradley, S.L. (author), Fyke, Jeremy (author), Ernani da Silva, C. (author), Sellevold, R. (author), Petrini, M. (author), Vizcaino, M. (author)

poster 2019

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Description and evaluation of the Community Ice Sheet Model (CISM) v2.1

Lipscomb, William H. (author), Price, Stephen F. (author), Hoffman, Matthew J. (author), Leguy, Gunter R. (author), Bennett, Andrew R. (author), Bradley, S.L. (author), Evans, Katherine J. (author), Fyke, Jeremy G. (author), Kennedy, Joseph H. (author)

We describe and evaluate version 2.1 of the Community Ice Sheet Model (CISM). CISM is a parallel, 3-D thermomechanical model, written mainly in Fortran, that solves equations for the momentum balance and the thickness and temperature evolution of ice sheets. CISM's velocity solver incorporates a hierarchy of Stokes flow approximations, including...

journal article 2019

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A Ten-Qubit Solid-State Spin Register with Quantum Memory up to One Minute

Bradley, C.E. (author), Randall, J.A.D. (author), Abobeih, M.H.M.A. (author), Berrevoets, R.C. (author), Degen, M.J. (author), Bakker, M. (author), Markham, M. (author), Twitchen, D. J. (author), Taminiau, T.H. (author)

Spins associated with single defects in solids provide promising qubits for quantum-information processing and quantum networks. Recent experiments have demonstrated long coherence times, high-fidelity operations, and long-range entanglement. However, control has so far been limited to a few qubits, with entangled states of three spins...

journal article 2019

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Effects of humidity and phosphor on silicone/phosphor composite in white light-emitting diode package

Hoque, Md Ashraful (author), Bradley, Robert Kelly (author), Fan, J. (author), Fan, X. (author)

Silicone/phosphor composite, which serve as mechanical protection and light conversion material, is an integral part of white light-emitting diode (LED) package. In this paper, a comprehensive study is conducted to investigate the effect of humidity and phosphor on moisture absorption, hygroscopic swelling, mechanical behavior, as well as...

journal article 2019

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Predicting marsh vulnerability to sea-level rise using Holocene relative sea-level data

Horton, Benjamin P. (author), Shennan, Ian (author), Bradley, S.L. (author), Cahill, Niamh (author), Kirwan, Matthew (author), Kopp, Robert E. (author), Shaw, Timothy A. (author)

Tidal marshes rank among Earth's vulnerable ecosystems, which will retreat if future rates of relative sea-level rise (RSLR) exceed marshes' ability to accrete vertically. Here, we assess the limits to marsh vulnerability by analyzing >780 Holocene reconstructions of tidal marsh evolution in Great Britain. These reconstructions include...

journal article 2018