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22 papers · 1 filter
Pseudospin for Raman D Band in Armchair Graphene Nanoribbons
K. Sasaki, K. Kato, Y. Tokura +2
By analytically constructing the matrix elements of an electron-phonon interaction for the band in the Raman spectra of armchair graphene nanoribbons, we show that pseudospin a…
Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
Xiaobo Zhu, Shiro Saito, Alexander Kemp +10
Electron-spin nitrogen-vacancy color centers in diamond are a natural candidate to act as a quantum memory for superconducting qubits because of their large collective coupling and…
Layer by layer generation of cluster states
Katherine L. Brown, Dominic Horsman, Viv Kendon +1
Cluster states can be used to perform measurement-based quantum computation. The cluster state is a useful resource, because once it has been generated only local operations and me…
Phase encoding schemes for measurement device independent quantum key distribution and basis-dependent flaw
Kiyoshi Tamaki, Hoi-Kwong Lo, Chi-Hang Fred Fung +1
In this paper, we study the unconditional security of the so-called measurement device independent quantum key distribution (MDIQKD) with the basis-dependent flaw in the context of…
Spin-orbital Kondo effect in a parallel double quantum dot
Yuma Okazaki, Satoshi Sasaki, Koji Muraki
Transport properties of the two-orbital Kondo effect involving both spin and orbital (pseudospin) degrees of freedom were examined in a parallel double quantum dot with a sufficien…
Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
R. Brunner, Y. -S. Shin, T. Obata +6
A crucial requirement for quantum information processing is the realization of multiple-qubit quantum gates. Here, we demonstrate an electron spin based all-electrical two-qubit ga…