126 citations · 356 across the 16 of their papers we have counts for
6 papers · 1 filter
Concatenated continuous-drive protection of exchange-based spin-qubit gates
Takuma Kuno, Takeru Utsugi, Andrew J. Ramsay +3
Exchange-based two-qubit gates in semiconductor spin qubits are sensitive to low-frequency detuning noise and control errors. Here, we extend concatenated continuous driving (CCD),…
Concatenated continuous driving of silicon qubit by amplitude and phase modulation
Takuma Kuno, Takeru Utsugi, Andrew J. Ramsay +22
The rate of coherence loss is lower for a qubit under the Rabi drive than a freely evolving qubit . Building on this principle, concatenated continuous d…
Generating Shuttling Procedures for Constrained Silicon Quantum Dot Array
Naoto Sato, Tomonori Sekiguchi, Takeru Utsugi +1
In silicon quantum computers, a single electron is trapped in a microstructure called a quantum dot, and its spin is used as a qubit. For large-scale integration of qubits, we prev…
Speed Limit of Efficient Cavity-Mediated Adiabatic Transfer
Akinori Suenaga, Takeru Utsugi, Rui Asaoka +3
Cavity-mediated adiabatic transfer (CMAT) is a robust way to perform a two-qubit gate between trapped atoms inside an optical cavity. In the previous study by Goto and Ichimura [H.…
Optimal cavity design for minimizing errors in cavity-QED-based atom-photon entangling gates with finite temporal duration
Takeru Utsugi, Rui Asaoka, Yuuki Tokunaga +1
We investigate atom-photon entangling gates based on cavity quantum electrodynamics (QED) for a finite photon-pulse duration, where not only the photon loss but also the temporal m…
Gaussian-wavepacket-model for single-photon generation based on cavity QED in the adiabatic and nonadiabatic conditions
Takeru Utsugi, Akihisa Goban, Yuuki Tokunaga +2
For single-photon generation based on cavity quantum electrodynamics, we investigate a practical model assuming a Gaussian wavepacket. This model makes it possible to comprehensive…