52 citations · 72 across the 6 of their papers we have counts for
6 papers
Fluxon Time-Delay Readout of a Superconducting Qubit Protected by a Spectral Gap in a Josephson Transmission Line
Shunsuke Kamimura, Aree Taguchi, Masamitsu Tanaka +1
We theoretically investigate a readout scheme of the quantum state of a superconducting qubit based on time delay of a single flux quantum (SFQ), also known as a fluxon, propagatin…
Stabilization of Kerr-cat qubits with quantum circuit refrigerator
Shumpei Masuda, Shunsuke Kamimura, Tsuyoshi Yamamoto +2
A periodically-driven superconducting nonlinear resonator can implement a Kerr-cat qubit, which provides a promising route to a quantum computer with a long lifetime. However, the…
Quantum Thermodynamics applied for Quantum Refrigerators cooling down a qubit
Hideaki Okane, Shunsuke Kamimura, Shingo Kukita +2
We discuss a quantum refrigerator to increase the ground state probability of a target qubit whose energy difference between the ground and excited states is less than the thermal…
Universal Scaling Bounds on a Quantum Heat Current
Shunsuke Kamimura, Kyo Yoshida, Yasuhiro Tokura +1
We derive new bounds on a heat current flowing into a quantum -particle system coupled with a Markovian environment. By assuming that a system Hamiltonian and a system-environme…
Quantum battery based on superabsorption
Yudai Ueki, Shunsuke Kamimura, Yuichiro Matsuzaki +2
A quantum battery is a device where an energy is charged by using a quantum effect. Here, we propose a quantum battery with a charger system composed of qubits by utilizing a c…
Quantum-Enhanced Heat Engine Based on Superabsorption
S. Kamimura, H. Hakoshima, Y. Matsuzaki +2
We propose a quantum-enhanced heat engine with entanglement. The key feature of our scheme is superabsorption, which facilitates enhanced energy absorption by entangled qubits. Whe…