The evolution speed of quantum measurement probabilities is bounded by their inherent quantum fluctuations, providing a correlation witness and a bound on transformation times to non-equilibrium states.
Deffner, Towards enhanced precision in thermometry with nonlinear qubits, Quantum Sci
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Nonlinear Gross-Pitaevskii qubits enable quantum Otto engines with significantly higher efficiency than linear engines.
A quantum speed limit for observables is formulated from the trace-norm asymmetry of the time-dependent state, observable through weak measurements and bounding the quantum Fisher information for the conjugate parameter.
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Quantum thermodynamics of Gross-Pitaevskii qubits
Nonlinear Gross-Pitaevskii qubits enable quantum Otto engines with significantly higher efficiency than linear engines.