scholarly journals Characterizing two-dimensional superconductivity via nanoscale noise magnetometry with single-spin qubits

2022 ◽  
Vol 105 (2) ◽  
Author(s):  
Pavel E. Dolgirev ◽  
Shubhayu Chatterjee ◽  
Ilya Esterlis ◽  
Alexander A. Zibrov ◽  
Mikhail D. Lukin ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Spin Qubits ◽  
Single Spin

scholarly journals Efficient controlled-phase gate for single-spin qubits in quantum dots

2011 ◽  
Vol 83 (12) ◽  
Author(s):  
T. Meunier ◽  
V. E. Calado ◽  
L. M. K. Vandersypen
Keyword(s):  
Quantum Dots ◽  
Spin Qubits ◽  
Single Spin ◽  
Phase Gate ◽  
Controlled Phase Gate

Charge noise, spin-orbit coupling, and dephasing of single-spin qubits

2014 ◽  
Vol 105 (19) ◽  
pp. 192102 ◽  
Author(s):  
Adam Bermeister ◽  
Daniel Keith ◽  
Dimitrie Culcer
Keyword(s):  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Qubits ◽  
Single Spin ◽  
Charge Noise

scholarly journals Two-Dimensional Nanoscale Imaging of Gadolinium Spins via Scanning Probe Relaxometry with a Single Spin in Diamond

2014 ◽  
Vol 2 (5) ◽  
Author(s):  
M. Pelliccione ◽  
B. A. Myers ◽  
L. M. A. Pascal ◽  
A. Das ◽  
A. C. Bleszynski Jayich
Keyword(s):  
Scanning Probe ◽  
Two Dimensional ◽  
Single Spin ◽  
Nanoscale Imaging

Two-dimensional honeycomb-kagome Ta2S3: a promising single-spin Dirac fermion and quantum anomalous hall insulator with half-metallic edge states

Nanoscale ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 5666-5673 ◽  
Author(s):  
Liang Zhang ◽  
Chang-wen Zhang ◽  
Shu-Feng Zhang ◽  
Wei-xiao Ji ◽  
Ping Li ◽  
...  
Keyword(s):  
Carrier Mobility ◽  
Magnetocrystalline Anisotropy ◽  
Dirac Fermion ◽  
High Curie Temperature ◽  
Two Dimensional ◽  
Edge States ◽  
Half Metallic ◽  
Single Spin ◽  
High Carrier Mobility ◽  
High Carrier

Recent experimental success in the realization of two-dimensional (2D) magnetism has invigorated the search for new 2D magnetic materials with a large magnetocrystalline anisotropy, high Curie temperature, and high carrier mobility.

scholarly journals An Operation Guide of Si-MOS Quantum Dots for Spin Qubits

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2486
Author(s):  
Rui-Zi Hu ◽  
Rong-Long Ma ◽  
Ming Ni ◽  
Xin Zhang ◽  
Yuan Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Rabi Oscillation ◽  
Stability Diagram ◽  
Near Neighbor ◽  
Spin Qubits ◽  
Orbital State ◽  
Single Spin ◽  
Spin Qubit ◽  
Charge Stability

In the last 20 years, silicon quantum dots have received considerable attention from academic and industrial communities for research on readout, manipulation, storage, near-neighbor and long-range coupling of spin qubits. In this paper, we introduce how to realize a single spin qubit from Si-MOS quantum dots. First, we introduce the structure of a typical Si-MOS quantum dot and the experimental setup. Then, we show the basic properties of the quantum dot, including charge stability diagram, orbital state, valley state, lever arm, electron temperature, tunneling rate and spin lifetime. After that, we introduce the two most commonly used methods for spin-to-charge conversion, i.e., Elzerman readout and Pauli spin blockade readout. Finally, we discuss the details of how to find the resonance frequency of spin qubits and show the result of coherent manipulation, i.e., Rabi oscillation. The above processes constitute an operation guide for helping the followers enter the field of spin qubits in Si-MOS quantum dots.

scholarly journals Probing magnetism in 2D materials at the nanoscale with single-spin microscopy

Science ◽  
2019 ◽  
Vol 364 (6444) ◽  
pp. 973-976 ◽  
Author(s):  
L. Thiel ◽  
Z. Wang ◽  
M. A. Tschudin ◽  
D. Rohner ◽  
I. Gutiérrez-Lezama ◽  
...  
Keyword(s):  
2D Materials ◽  
Nitrogen Vacancy ◽  
Two Dimensional ◽  
Magnetic Domains ◽  
Structural Modifications ◽  
Single Spin ◽  
Number Of Layers ◽  
Nitrogen Vacancy Centers ◽  
Localized Defects ◽  
Widespread Interest

The discovery of ferromagnetism in two-dimensional (2D) van der Waals (vdW) crystals has generated widespread interest. Making further progress in this area requires quantitative knowledge of the magnetic properties of vdW magnets at the nanoscale. We used scanning single-spin magnetometry based on diamond nitrogen-vacancy centers to image the magnetization, localized defects, and magnetic domains of atomically thin crystals of the vdW magnet chromium(III) iodide (CrI3). We determined the magnetization of CrI3monolayers to be ≈16 Bohr magnetons per square nanometer, with comparable values in samples with odd numbers of layers; however, the magnetization vanishes when the number of layers is even. We also found that structural modifications can induce switching between ferromagnetic and antiferromagnetic interlayer ordering. These results demonstrate the benefit of using single-spin scanning magnetometry to study the magnetism of 2D vdW magnets.

scholarly journals Single-spin qubit magnetic spectroscopy of two-dimensional superconductivity

2022 ◽  
Vol 4 (1) ◽  
Author(s):  
Shubhayu Chatterjee ◽  
Pavel E. Dolgirev ◽  
Ilya Esterlis ◽  
Alexander A. Zibrov ◽  
Mikhail D. Lukin ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Single Spin ◽  
Spin Qubit

scholarly journals Single-spin qubits in isotopically enriched silicon at low magnetic field

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
R. Zhao ◽  
T. Tanttu ◽  
K. Y. Tan ◽  
B. Hensen ◽  
K. W. Chan ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Large Scale ◽  
High Fidelity ◽  
Single Shot ◽  
Spin Qubits ◽  
Single Spin ◽  
Trade Offs ◽  
Silicon Quantum Dot ◽  
Microwave Engineering ◽  
Spin Flips

AbstractSingle-electron spin qubits employ magnetic fields on the order of 1 Tesla or above to enable quantum state readout via spin-dependent-tunnelling. This requires demanding microwave engineering for coherent spin resonance control, which limits the prospects for large scale multi-qubit systems. Alternatively, singlet-triplet readout enables high-fidelity spin-state measurements in much lower magnetic fields, without the need for reservoirs. Here, we demonstrate low-field operation of metal-oxide-silicon quantum dot qubits by combining coherent single-spin control with high-fidelity, single-shot, Pauli-spin-blockade-based ST readout. We discover that the qubits decohere faster at low magnetic fields with $${T}_{2}^{\,\text{Rabi}\,}=18.6$$T2Rabi=18.6 μs and $${T}_{2}^{* }=1.4$$T2*=1.4 μs at 150 mT. Their coherence is limited by spin flips of residual 29Si nuclei in the isotopically enriched 28Si host material, which occur more frequently at lower fields. Our finding indicates that new trade-offs will be required to ensure the frequency stabilization of spin qubits, and highlights the importance of isotopic enrichment of device substrates for the realization of a scalable silicon-based quantum processor.

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