70 citations · 410 across the 21 of their papers we have counts for
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Eigenvector Expansion and Petermann Factor for Ohmically Damped Oscillators
Alec Maassen van den Brink, K. Young, M. H. Yung
Correlation functions in ohmically damped systems such as coupled harmonic oscillators or optical resonators can be expressed as a single sum over modes …
Hamiltonian for coupled flux qubits
Alec Maassen van den Brink
An effective Hamiltonian is derived for two coupled three-Josephson-junction (3JJ) qubits. This is not quite trivial, for the customary "free" 3JJ Hamiltonian is written in the lim…
Observation of macroscopic Landau-Zener transitions in a superconducting device
A. Izmalkov, M. Grajcar, E. Il'ichev +7
A two-level system traversing a level anticrossing has a small probability to make a so-called Landau-Zener (LZ) transition between its energy bands, in deviation from simple adiab…
Approach to the extremal limit of the Schwarzschild-de Sitter black hole
Alec Maassen van den Brink
The quasinormal-mode spectrum of the Schwarzschild-de Sitter black hole is studied in the limit of near-equal black-hole and cosmological radii. It is found that the mode_frequenci…
WKB analysis of the Regge-Wheeler equation down in the frequency plane
Alec Maassen van den Brink
The Regge-Wheeler equation for black-hole gravitational waves is analyzed for large negative imaginary frequencies, leading to a calculation of the cut strength for waves outgoing…
Low-frequency measurement of the tunneling amplitude in a flux qubit
M. Grajcar, A. Izmalkov, E. Il'ichev +13
We have observed signatures of resonant tunneling in an Al three-junction qubit, inductively coupled to a Nb LC tank circuit. The resonant properties of the tank oscillator are sen…
Unconventional Gravitational Excitation of a Schwarzschild Black Hole
P. T. Leung, Alec Maassen van den Brink, K. W. Mak +1
Besides the well-known quasinormal modes, the gravitational spectrum of a Schwarzschild black hole also has a continuum part on the negative imaginary frequency axis. The latter is…