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quant-ph2019
Quadrature coherence scale driven fast decoherence of bosonic quantum field states
Anaelle Hertz, Stephan De Bièvre
We introduce, for each state of a bosonic quantum field, its quadrature coherence scale (QCS), a measure of the range of its quadrature coherences. Under coupling to a thermal bath…
quant-ph2019
Multi-copy uncertainty observable inducing a symplectic-invariant uncertainty relation in position and momentum phase space
Anaelle Hertz, Ognyan Oreshkov, Nicolas J. Cerf
We define an uncertainty observable, acting on several replicas of a continuous-variable bosonic state, whose trivial uncertainty lower bound induces nontrivial phase-space uncerta…