167 citations · 437 across the 9 of their papers we have counts for
9 papers
Microwave-multiplexed qubit controller using adiabatic superconductor logic
Naoki Takeuchi, Taiki Yamae, Taro Yamashita +2
Cryogenic qubit controllers (QCs) are the key to build large-scale superconducting quantum processors. However, developing scalable QCs is challenging because the cooling power of…
Quantum interference due to crossed Andreev reflection in a d-wave superconductor with two nano-contacts
S. Takahashi, T. Yamashita, S. Maekawa
The crossed Andreev reflection in a hybrid nanostructure consisting of a d-wave superconductor and two quantum wires is theoretically studied. When the (110) oriented surface of th…
Controllable pi junction with magnetic nanostructures
T. Yamashita, S. Takahashi, S. Maekawa
We propose a novel Josephson device in which 0 and states are controlled by an electrical current. In this system, the state appears in a superconductor/normal metal/superc…
Superconducting pi qubit with a ferromagnetic Josephson junction
T. Yamashita, K. Tanikawa, S. Takahashi +1
Solid-state qubits have the potential for the large-scale integration and for the flexibility of layout for quantum computing. However, their short decoherence time due to the coup…
3-dimensional arrays of BiSrCaCuO-2212 intrinsic Josephson junctions and the zero-crossing Shapiro steps at 760 GHz
H. B. Wang, P. H. Wu, J. CHen +2
On a slice of Bi_2Sr_2CaCu_2O_{8+x} 200~300 nm thick, stacks of intrinsic Josephson junctions are patterned, connected to each other, and integrated with a bow-tie antenna and some…
Spin transport and relaxation in superconductors
T. Yamashita, S. Takahashi, H. Imamura +1
We study theoretically the effect of spin relaxation on the spin transport in a ferromagnet/superconductor(FM/SC) tunnel junction. When spin-polarized electrons are injected into t…