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Tero T. Heikkilä on Muck Rack

Tero T. Heikkilä

As seen in: Physical Review B
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Articles

Nonreciprocal Josephson Linear Response

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By Pauli Virtanen, Tero T. Heikkilä
| Physical Review B
We consider the finite-frequency response of multiterminal Josephson junctions and show how nonreciprocity in them can show up at linear response, in contrast to the static Josephson diodes featuring nonlinear nonreciprocity. At finite frequencies, the response contains dynamic contributions to the Josephson admittance, featuring the effects of Andreev bound state transitions along with Berry phase effects, and reflecting the breaking of the same symmetries as in Josephson diodes.
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Signatures and characterization of dominating Kerr nonlinearity between two driven systems with application to a suspended magnetic beam

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By Andrii Sokolov, Tero T. Heikkilä
| Physical Review B
We consider a model of two harmonically driven damped harmonic oscillators that are coupled linearly and with a cross-Kerr coupling. We show how to distinguish this combination of coupling types from the case where a coupling of optomechanical type is present. This can be useful for the characterization of various nonlinear systems, such as mechanical oscillators, qubits, and hybrid systems.
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Dynamics of Two Ferromagnetic Insulators Coupled by Superconducting Spin Current

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By Centro Mixto CSIC-UPV, Risto Ojajärvi, Tero T. Heikkilä
| Physical Review B
COVID-19 has impacted many institutions and organizations around the world, disrupting the progress of research. Through this difficult time APS and the Physical Review editorial office are fully equipped and actively working to support researchers by continuing to carry out all editorial and peer-review functions and publish research in the journals as well as minimizing disruption to journal access.
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