J
J. R. Johansson
Researcher at Chalmers University of Technology
Publications - 24
Citations - 5367
J. R. Johansson is an academic researcher from Chalmers University of Technology. The author has contributed to research in topics: Qubit & Josephson effect. The author has an hindex of 13, co-authored 24 publications receiving 3985 citations.
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QuTiP 2: A Python framework for the dynamics of open quantum systems ✩
TL;DR: The Quantum Toolbox in Python as mentioned in this paper has been updated with new features, enhanced performance, and made changes in the API for improved functionality and consistency within the package, as well as increased compatibility with existing conventions used in other scientific software packages for Python.
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QuTiP: An open-source Python framework for the dynamics of open quantum systems !
TL;DR: An object-oriented open-source framework for solving the dynamics of open quantum systems written in Python that is particularly well suited to the fields of quantum optics, superconducting circuit devices, nanomechanics, and trapped ions, while also being ideal for use in classroom instruction.
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Observation of the dynamical Casimir effect in a superconducting circuit
Christopher Wilson,Göran Johansson,Arsalan Pourkabirian,Michael Roger Andre Simoen,J. R. Johansson,Tim Duty,Franco Nori,Per Delsing +7 more
TL;DR: The dynamical Casimir effect is observed in a superconducting circuit consisting of a coplanar transmission line with a tunable electrical length and two-mode squeezing in the emitted radiation is detected, which is a signature of the quantum character of the generation process.
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Colloquium: Stimulating uncertainty: Amplifying the quantum vacuum with superconducting circuits
TL;DR: In this article, the authors describe several mechanisms for generating photons from the quantum vacuum and emphasize their connection to the well-known parametric amplifier from quantum optics, and discuss the possible realization of each mechanism or its analog, in superconducting circuit systems.
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Squeezed optomechanics with phase-matched amplification and dissipation.
Xin-You Lü,Ying Wu,J. R. Johansson,Hui Jing,Hui Jing,Jing Zhang,Jing Zhang,Franco Nori,Franco Nori +8 more
TL;DR: This proposal offers an alternative approach to control the OMS using a squeezed cavity mode, which should allow single-photon quantum processes to be implemented with currently available optomechanical technology.