Negative probabilities can occur in quasiprobability distributions in quantum mechanics
the verdict
SUPPORTED
the evidence backs this
confidence 79/100
Negative probabilities and non-real values are well-documented features of quasiprobability distributions, such as the Wigner and Kirkwood-Dirac functions, reflecting non-classical quantum phenomena like quantum coherence.
Evidence for · 4
Logical entropy and negative probabilities in quantum mechanics
2022 · cited by 4
Discusses how the quadratic form of logical entropy allows for a generalization of probabilities that includes negative values in quantum mechanics, tracing the concept back to Feynman and Wigner.
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More for · 3
Statistical Signatures of Quantum Contextuality.
2024 · cited by 1
Notes that a complete description of quantum states involves elements of the Kirkwood-Dirac quasiprobability, which can exhibit non-classical statistical features.
Snapshotting quantum dynamics at multiple time points.
2024 · cited by 1
Reconstructs multi-time quasi-probability distributions and explicitly notes that negativity and complex values within these distributions indicate quantum coherence.
Quantifying the Nonclassicality of the Kirkwood-Dirac Quasiprobability Distribution Under Discrete-Time Dynamics.
2026 · cited by 0
Explains that the Kirkwood-Dirac quasiprobability distribution can take on negative or nonreal values, serving as a measure of quantum nonclassicality.