Alexander Shnirman
Karlsruhe Institute of Technology
192 Papers
1.1K Citations
Alexander Shnirman is an academic researcher from Karlsruhe Institute of Technology. The author has contributed to research in topics: Qubit & Josephson effect. The author has an hindex of 39, co-authored 184 publications. Previous affiliations of Alexander Shnirman include Tel Aviv University & Los Alamos National Laboratory.
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Papers
Quantum-state engineering with Josephson-junction devices
TL;DR: In this article, the authors review the properties of low-capacitance Josephson tunneling junctions and the practical and fundamental obstacles to their use for quantum information processing and describe how the basic physical manipulations on an ideal device can be combined to perform useful operations.
Decoherence in a superconducting quantum bit circuit
G. Ithier,Eddy Collin,Philippe Joyez,P. J. Meeson,P. J. Meeson,Denis Vion,Daniel Esteve,Fabio Chiarello,Alexander Shnirman,Yuriy Makhlin,Yuriy Makhlin,Josef Schriefl,Josef Schriefl,Gerd Schön +13 more
TL;DR: This work presents experiments, inspired from NMR, that characterize decoherence in a particular superconducting quantum bit circuit, the quantronium, and introduces a general framework for the analysis of decoherent, based on the spectral density of the noise sources coupled to the qubit.
Josephson-Junction Qubits with Controlled Couplings
TL;DR: In this article, a nano-electronic design, close to ideal, where the Josephson junctions are replaced by controllable SQUIDs, was proposed, which relaxes the requirements on the time control and system parameters substantially, and the two-bit coupling can be switched exactly between zero and a nonzero value for arbitrary pairs.
428
Decoherence from ensembles of two-level fluctuators
TL;DR: In this paper, the authors studied the dephasing process for a class of distribution functions and analyzed the self-averaging properties of the results for the case when the distribution of coupling strengths has a slowly decaying power-law tail.
253
Low- and high-frequency noise from coherent two-level systems.
TL;DR: It is shown that a distribution, natural for tunneling TLS's, with a log-uniform distribution in the tunnel splitting and linear distribution inThe bias, accounts for experimental observations.