7 papers
Emergent energy scales in magnonic systems with relative motion
Daigo Oue
Relative motion between interacting systems can generate emergent energy scales that are absent in isolated systems. While uniform motion can be eliminated by a Galilean transforma…
Macroscopic Quantum Electrodynamics with Gain: Modified Fluctuations and Their Consequences
Daigo Oue
Macroscopic quantum electrodynamics (MQED) provides a unified framework for describing quantum electromagnetic fields in arbitrary macroscopic environments. Central to this theory…
Fluctuation-induced Hall-like lateral forces in a chiral-gain environment
Daigo Oue, Mário G. Silveirinha
Here, we demonstrate that vacuum fluctuations can induce lateral forces on a small particle positioned near a translation-invariant uniform non-Hermitian substrate with chiral gain…
Chiral Gain-Induced Time-Reversal Symmetry Breaking in Quantum Systems
Mário G. Silveirinha, Daigo Oue
Structured light offers a powerful approach to tailor light-matter interactions in quantum systems with chiral properties. While chirality has been extensively studied in passive p…
Parametric instability in a magnomechanical system
Takahiro Uto, Daigo Oue
We study parametric instability in a magnomechanical system, specifically examining magnon tunneling between moving ferromagnetic insulators. Our analysis reveals that quantum fluc…
Quantum Friction near the Instability Threshold
Daigo Oue, Boris Shapiro, Mário G. Silveirinha
In this work, we develop an analytical framework to understand quantum friction across distinct stability regimes, providing approximate expressions for frictional forces both in t…