212 citations · 342 across the 17 of their papers we have counts for
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Operator-frame geometry of non-compact quantum systems with frame-vacuum phase transitions
Satoshi Tanaka, Gonzalo Ordonez, Masatoshi Kubota +2
We formulate the geometric structure of non-compact bosonic quantum systems in regimes where vacuum instability renders the relevant quantum states non-normalizable, causing conven…
Theory of Stationary Photon Emission from a Steadily Driven Parametric Oscillator Based on the Complex Spectral Analysis of the Heisenberg Equation
Kazuki Kanki, Satoshi Tanaka
We show how the properties of photon emission to a continuous field from a parametric oscillator relate to the behavior of the complex eigenfrequencies of the oscillator. The param…
Dissipative dynamical Casimir effect in terms of the complex spectral analysis in the symplectic-Floquet space
Satoshi Tanaka, Kazuki Kanki
Dynamical Casimir effect of the optomechanical cavity interacting with one-dimensional photonic crystal is theoretically investigated in terms of the complex spectral analysis of F…
Dynamical Casimir effect in dissipative optomechanical cavity interacting with photonic crystal
Satoshi Tanaka, Kazuki Kanki
We theoretically study the dynamical Casimir effect (DCE), i.e., parametric amplification of a quantum vacuum, in an optomechanical cavity interacting with a photonic crystal, whic…
A new perspective on the Fano absorption spectrum in terms of complex spectral analysis
Taku Fukuta, Savannah Garmon, Kazuki Kanki +2
A new aspect of understanding a Fano absorption spectrum is presented in terms of the complex spectral analysis. The absorption spectrum of an impurity embedded in semi-infinite su…
Exact description of coalescing eigenstates in open quantum systems in terms of microscopic Hamiltonian dynamics
Kazuki Kanki, Savannah Garmon, Satoshi Tanaka +1
At the exceptional point where two eigenstates coalesce in open quantum systems, the usual diagonalization scheme breaks down and the Hamiltonian can only be reduced to Jordan bloc…