scholarly journals Molecular orbital calculations of two-electron states for P-donor solid-state spin qubits

2006 ◽  
Vol 73 (11) ◽  
Author(s):  
L. M. Kettle ◽  
Hsi-Sheng Goan ◽  
Sean C. Smith
Keyword(s):  
Solid State ◽  
Molecular Orbital ◽  
Molecular Orbital Calculations ◽  
Spin Qubits ◽  
Electron States ◽  
State Spin

A/C-Ring Colchicine Analogues: a Comparison of Molecular Conformations of the Minimized and Crystal Structures

1997 ◽  
Vol 50 (2) ◽  
pp. 115
Author(s):  
Kiah H. Ang ◽  
Richard J. Greenwood ◽  
Maureen F. Mackay ◽  
Margaret G. Wong
Keyword(s):  
Solid State ◽  
Molecular Mechanics ◽  
Crystal Structures ◽  
Molecular Orbital ◽  
Low Energy ◽  
Molecular Orbital Calculations ◽  
Tubulin Polymerization ◽  
Ring Systems ◽  
Molecular Conformations ◽  
Low Energy Conformations

Molecular mechanics and molecular orbital calculations have been used to determine the low-energy conformations of six biaryl analogues of colchicine lacking the seven-membered B-ring. A comparison of the conformations resulting from the different minimizations has been made, and these conformations were also compared with those found in the solid state for the respective biaryl analogues and the A/C-ring systems of colchicine and isocolchicine. The barriers to rotation about the A/C-linkage of the analogues were estimated from rotational plots. The MM+ calculations were not satisfactory for estimating the barriers, whilst the MMX, MAXIMIN2 and AM1 values, although agreeing on average only to within 16 kJ mol-1 , exhibited the expected trend in magnitude. This trend, however, did not correlate with the inhibition of tubulin polymerization to microtubules.

Solid-State Spin Qubits

2021 ◽  
pp. 259-273
Author(s):  
Ray LaPierre
Keyword(s):  
Solid State ◽  
Spin Qubits ◽  
State Spin

scholarly journals Electron exchange coupling for single-donor solid-state spin qubits

2003 ◽  
Vol 68 (19) ◽  
Author(s):  
C. J. Wellard ◽  
L. C. L. Hollenberg ◽  
F. Parisoli ◽  
L. M. Kettle ◽  
H.-S. Goan ◽  
...  
Keyword(s):  
Solid State ◽  
Exchange Coupling ◽  
Electron Exchange ◽  
Spin Qubits ◽  
Single Donor ◽  
State Spin

All-optical Raman-based noise spectroscopy of solid-state spin qubits

2021 ◽  
Author(s):  
Demitry Farfurnik ◽  
Harjot Singh ◽  
Zhouchen Luo ◽  
Allan S. Bracker ◽  
Samuel G. Carter ◽  
...  
Keyword(s):  
Solid State ◽  
Spin Qubits ◽  
Noise Spectroscopy ◽  
All Optical ◽  
State Spin

scholarly journals Analyzing photon-count heralded entanglement generation between solid-state spin qubits by decomposing the master-equation dynamics

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
Stephen C. Wein ◽  
Jia-Wei Ji ◽  
Yu-Feng Wu ◽  
Faezeh Kimiaee Asadi ◽  
Roohollah Ghobadi ◽  
...  
Keyword(s):  
Solid State ◽  
Master Equation ◽  
Spin Qubits ◽  
Entanglement Generation ◽  
Photon Count ◽  
State Spin

scholarly journals All-optical noise spectroscopy of a solid-state spin

2021 ◽  
Author(s):  
Demitry Farfurnik ◽  
Harjot Singh ◽  
Zhouchen Luo ◽  
Allan Bracker ◽  
Sam Carter ◽  
...  
Keyword(s):  
Solid State ◽  
Spin Dynamics ◽  
Pulse Sequences ◽  
Noise Spectrum ◽  
Frequency Noise ◽  
Optical Noise ◽  
Spin Qubits ◽  
Noise Spectroscopy ◽  
All Optical ◽  
State Spin

Abstract Noise spectroscopy elucidates the fundamental noise sources in spin systems, which is essential for developing spin qubits with long coherence times for quantum information processing, communication, and sensing. But noise spectroscopy typically relies on microwave coherent spin control to extract the noise spectrum, which becomes infeasible when there are high-frequency noise components stronger than the available microwave power. Here, we demonstrate an alternative all-optical approach to performing noise spectroscopy. Our approach utilises coherent Raman rotations of the spin state with controlled timing and phase to implement Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences. Analysing the spin dynamics under these sequences enables us to extract the noise spectrum of a dense ensemble of nuclear spins interacting with a single spin in a quantum dot, which has thus far only been modelled theoretically. By providing large spectral bandwidths of over 100 MHz, our Raman-based approach could serve as an important tool to study spin dynamics and decoherence mechanisms for a broad range of solid-state spin qubits.

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