186 citations · 661 across the 19 of their papers we have counts for
19 papers
Fast Microwave-free State Preparation and Measurement of Superconducting Qubits
R. Abraham, F. Amet, P. Anderson +212
Fast, high-fidelity, scalable state preparation and measurement is critical to the realization of a quantum computing system. The state-of-the-art methods for preparation and reado…
Decoherence of a tunable capacitively shunted flux qubit
R. Trappen, X. Dai, M. A. Yurtalan +19
Quantum annealing is a method to solve optimization problems that leverages quantum tunneling in a coupled qubit system. We present a detailed study of the coherence of a tunable c…
Optimizing for periodicity: a model-independent approach to flux crosstalk calibration for superconducting circuits
X. Dai, R. Trappen, R. Yang +12
Flux tunability is an important engineering resource for superconducting circuits. Large-scale quantum computers based on flux-tunable superconducting circuits face the problem of…
Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling
X. Dai, R. Trappen, H. Chen +22
Landau-Zener tunneling, which describes the transition in a two-level system during a sweep through an anti-crossing, is a model applicable to a wide range of physical phenomena. R…
Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain
Daniel M. Tennant, Xi Dai, Antonio J. Martinez +20
Spin chains have long been considered an effective medium for long-range interactions, entanglement generation, and quantum state transfer. In this work, we explore the properties…
Calibration of flux crosstalk in large-scale flux-tunable superconducting quantum circuits
X. Dai, D. M. Tennant, R. Trappen +16
Magnetic flux tunability is an essential feature in most approaches to quantum computing based on superconducting qubits. Independent control of the fluxes in multiple loops is ham…
Fast, Lifetime-Preserving Readout for High-Coherence Quantum Annealers
Jeffrey A. Grover, James I. Basham, Alexander Marakov +15
We demonstrate, for the first time, that a quantum flux parametron (QFP) is capable of acting as both isolator and amplifier in the readout circuit of a capacitively shunted flux q…
Anneal-path correction in flux qubits
Mostafa Khezri, Jeffrey A. Grover, James I. Basham +5
Quantum annealers require accurate control and optimized operation schemes to reduce noise levels, in order to eventually demonstrate a computational advantage over classical algor…
Exploring More-Coherent Quantum Annealing
Sergey Novikov, Robert Hinkey, Steven Disseler +6
In the quest to reboot computing, quantum annealing (QA) is an interesting candidate for a new capability. While it has not demonstrated an advantage over classical computing on a…
Structural and Magnetic Phase Transitions in Chromium Nitride Thin Films Grown by RF Nitrogen Plasma Molecular Beam Epitaxy
Khan Alam, Steven M. Disseler, William D. Ratcliff +8
A magneto-structural phase transition is investigated in single crystal CrN thin films grown by rf plasma molecular beam epitaxy on MgO(001) substrates. While still within the vacu…
Tailoring Exchange Couplings in Magnetic Topological Insulator/Antiferromagnet Heterostructures
Qing Lin He, Xufeng Kou, Alexander J. Grutter +13
Magnetic topological insulators such as Cr-doped (Bi,Sb)2Te3 provide a platform for the realization of versatile time-reversal symmetry-breaking physics. By constructing heterostru…
Magnetic Structure and Ordering of Multiferroic Hexagonal LuFeO3
Steven M. Disseler, Julie A. Borchers, Charles M. Brooks +12
We report on the magnetic structure and ordering of hexagonal LuFeO3 films grown by molecular-beam epitaxy (MBE) on YSZ (111) and Al2O3 (0001) substrates. Using a set of complement…
Magnetic Structure of Hexagonal Mn-doped LuFeO
Steven M. Disseler, Xuan Luo, Yoon Seok Oh +6
Neutron scattering techniques are used to investigate the crystalline and magnetic structure of LuFeMnO in bulk polycrystalline form. We find that the cryst…
Effect of carrier concentration on magnetism and magnetic order in the pyrochlore iridates
M. J. Graf, S. M. Disseler, Chetan Dhital +9
We present resistivity, magnetization, and zero field muon spin relaxation (SR) data for the pyrochlore iridate materials NdCaIrO (, and $…
Direct Evidence for the 'All-in/All-out' Magnetic Structure in the Pyrochlore Iridates from SR
Steven M. Disseler
In the pyrochlore iridates, \textit{R}IrO (\textit{R} = Lanthanide, Y), determination of the magnetic structure of the iridium moments remains an outstanding prob…
Spin ordering and electronic texture in the bilayer iridate SrIrO
Chetan Dhital, Sovit Khadka, Z. Yamani +9
Through a neutron scattering, charge transport, and magnetization study, the correlated ground state in the bilayer iridium oxide SrIrO is explored. Our combined result…
Competing Interactions and Magnetic Frustration in Yb4LiGe4
S. M. Disseler, J. N. Svensson, S. C. Peter +6
We have studied polycrystalline Yb4LiGe4, a ternary variant of the R5T4 family of layered compounds characterized by a very strong coupling between the magnetic and crystallographi…
Yb4LiGe4 - A Yb Mixed Valent Zintl Phase with Strong Electronic Correlations
Sebastian C. Peter, Steven M. Disseler, J. Niclas Svensson +2
Single-phase samples of Yb4LiGe4 and Yb5Ge4 were synthesized using high frequency (HF) heat treatment. Yb4LiGe4 crystallizes in orthorhombic space group Pnma with the Gd5Si4 type o…
Superconductivity of Bi Confined in an Opal Host
R. C. Johnson, M. D. Nieskoski, S. M. Disseler +2
Superconductivity is observed in a composite of rhombohedral crystalline bismuth nanoparticles imbedded in an insulating porous opal host via electrical transport and AC magnetic s…