399 citations · 742 across the 10 of their papers we have counts for
9 papers · 1 filter
Electronic cooling of a submicron-sized metallic beam
J. T. Muhonen, A. O. Niskanen, M. Meschke +5
We demonstrate electronic cooling of a suspended AuPd island using superconductor-insulator-normal metal tunnel junctions. This was achieved by developing a simple fabrication meth…
Spectroscopy of superconducting charge qubits coupled by a Josephson inductance
T. Yamamoto, M. Watanabe, J. Q. You +5
We have designed and experimentally implemented a circuit of inductively-coupled superconducting charge qubits, where a Josephson junction is used as an inductance, and the couplin…
Decoherence of flux qubits due to 1/f flux noise
F. Yoshihara, K. Harrabi, A. O. Niskanen +2
We have investigated decoherence in Josephson-junction flux qubits. Based on the measurements of decoherence at various bias conditions, we discriminate contributions of different…
Parity effect in superconducting aluminum single electron transistors with spatial gap profile controlled by film thickness
T. Yamamoto, Y. Nakamura, Yu. A. Pashkin +2
We propose a novel method for suppression of quasiparticle poisoning in Al Coulomb blockade devices. The method is based on creation of a proper energy gap profile along the device…
Tunable coupling scheme for flux qubits at the optimal point
Antti O. Niskanen, Yasunobu Nakamura, Jaw-Shen Tsai
We discuss a practical design for tunably coupling a pair of flux qubits via the quantum inductance of a third high-frequency qubit. The design is particularly well suited for real…
Quantum noise in the Josephson charge qubit
O. Astafiev, Yu. A. Pashkin, Y. Nakamura +2
We study decoherence of the Josephson charge qubit by measuring energy relaxation and dephasing with help of the single-shot readout. We found that the dominant energy relaxation p…