Observable most probable trajectories of quantum switching in modulated oscillator

Vittorio Peano, Lingzhen Guo, Michael Marthaler +2 more

Vittorio Peano, Michael Marthaler, M. I. Dykman

Jeffrey E. Marchese, Matteo Cirillo, Niels Grønbech‐Jensen

We present a classical analysis of the transient response of Josephson junctions perturbed by microwaves and thermal fluctuations. The results include a specific low-frequency modulation in phase and amplitude behavior of a junction in its zero-voltage state. This transient modulation frequency is linked directly to an observed variation in the probability for the system to switch to its nonzero voltage state. Complementing previous work on linking classical analysis to the experimental observations of Rabi oscillations, this expanded perturbation method also provides closed-form analytical results for attenuation of the modulations and the Rabi-type oscillation frequency. Results of perturbation analysis are compared directly (and quantitatively) to numerical simulations of the classical model as well as published experimental data, suggesting that transients to phase-locking are closely related to the observed oscillations.

M. I. Dykman

Periodically modulated nonlinear oscillators often display bistability of forced vibrations. This bistability can be used for new types of quantum measurements. They are based on switching between coexisting vibrational states. Since switching is accompanied by a large change of the amplitude and phase of forced vibrations, the measurements are highly sensitive. Quantum and classical noise plays dual role. It imposes a limitation on sensitivity in the familiar regime of a bifurcation amplifier. On the other hand, it makes it possible to use a bistable modulated oscillator in a new regime of a balanced dynamical bridge. We discuss the switching probabilities and show that they display scaling with control parameters. The critical exponents are found for different types of bifurcations and for different types of noise.

Maksim Sozonov

This paper presents a deterministic temporal interpretation of quantum mechanics. It proposes that a particle has multiple possible trajectories, but it does not move along them simultaneously. Instead, the particle switches between trajectories over time, spending more time on the trajectory where the probability of detection is higher according to the Schrödinger equation. The particle does not have a fixed position until it interacts with a detector. This approach explains the statistical patterns observed in quantum experiments, such as the double-slit experiment, while maintaining determinism and remaining fully consistent with quantum mechanics.

Brad R. Trees, Elizabeth Segelken