Unitary death of Schr\"odinger's cat
Pavel Str\'ansk\'y, Pavel Cejnar, Radim Filip

TL;DR
This paper investigates how a slight parity violation in the Rabi model causes symmetric Schrödinger cat states to spontaneously and unitarily collapse, offering a potential experimental test of wave-function collapse mechanisms.
Contribution
It demonstrates that parity violation in the Rabi model leads to a spontaneous, unitary collapse of Schrödinger cat states, providing a new perspective on quantum measurement processes.
Findings
Symmetric Schrödinger cat states are generated by parity violation.
These states undergo spontaneous collapse in a unitary manner.
The effect is experimentally testable with current quantum systems.
Abstract
We analyze dynamics of the Rabi model describing interactions of a qubit with a single soft-mode oscillator. We show that the model with a slightly violated parity generates symmetric Schr{\"o}dinger cat states of the oscillator, which suddenly perish in a spontaneous unitary process similar to the measurement-induced wave-function collapse. The effect is sufficiently robust to be tested experimentally, e.g., with trapped ions, macroscopic mechanical oscillators or superconducting circuits.
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Taxonomy
TopicsQuantum Mechanics and Applications
