Completing the Grand Tour of asymptotic quantum coherence manipulation

Abstract

We compute on all quantum states several measures that characterise asymptotic quantum coherence manipulation under restricted classes of operations. We focus on the distillable coherence, i.e. the maximum rate of production of approximate pure bits of coherence starting from independent copies of an input state $\rho$, and on the coherence cost, i.e. the minimum rate of consumption of pure coherence bits that is needed to generate many copies of $\rho$ with vanishing error. We obtain the first closed-form expression for the distillable coherence under strictly incoherent operations (SIO), proving that it coincides with that obtained via physically incoherent operations (PIO). This shows that SIO and PIO are equally weak at distilling coherence, sheds light on the recently discovered phenomenon of generic bound coherence, and provides us with an explicit optimal distillation protocol that is amenable to practical implementations. We give a single-letter formula for the coherence cost under PIO, showing that it is finite on a set of states with nonzero volume. Since PIO can be realised in a laboratory with incoherent ancillae, unitaries, and measurements, our result puts fundamental limitations on coherence manipulation in an experimentally relevant setting. We find examples of 'abyssally bound' states with vanishing PIO distillable coherence yet infinite PIO coherence cost. Our findings complete the picture of asymptotic coherence manipulation under all the main classes of incoherent operations.

19 pages; v2, which is close to the published version, features the new Lemma 9 and Corollary 18

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• Tight constraints on probabilistic convertibility of quantum states
• Catalyst-Assisted Probabilistic Coherence Distillation for Mixed States
• General Quantum Resource Theories: Distillation, Formation and Consistent Resource Measures
• Asymptotic state transformations of continuous variable resources
• Coherence of operations and interferometry
• Information-based approach towards a unified resource theory
• Partial order on passive states and Hoffman majorization in quantum thermodynamics
• Optimal probabilistic distillation of quantum coherence
• Characterizing coherence with quantum observables
• Hierarchy of quantum operations in manipulating coherence and entanglement
• Approximate distillation of quantum coherence
• No-go theorems for deterministic purification and probabilistic enhancement of coherence
• Criterion for a state to be distillable via stochastic incoherent operations
• Coherence filtration under strictly incoherent operations
• Operational Interpretation of Quantum Fisher Information in Quantum Thermodynamics
• Closed expressions for one-qubit states of convex roof coherence measures
• Incoherent Operations Enable State Transformations Impossible under Dephasing-covariant Incoherent Operations