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- Title
Resource theory of imaginarity in distributed scenarios.
- Authors
Wu, Kang-Da; Kondra, Tulja Varun; Scandolo, Carlo Maria; Rana, Swapan; Xiang, Guo-Yong; Li, Chuan-Feng; Guo, Guang-Can; Streltsov, Alexander
- Abstract
The resource theory of imaginarity studies the operational value of imaginary parts in quantum states, operations, and measurements. Here we introduce and study the distillation and conversion of imaginarity in distributed scenario. This arises naturally in bipartite systems where both parties work together to generate the maximum possible imaginarity on one of the subsystems. We give exact solutions to this problem for general qubit states and pure states of arbitrary dimension. We present a scenario that demonstrates the operational advantage of imaginarity: the discrimination of quantum channels without the aid of an ancillary system. We then link this scenario to local operations and classical communications(LOCC) discrimination of bipartite states. We experimentally demonstrate the relevant assisted distillation protocol, and show the usefulness of imaginarity in the aforementioned two tasks. This work examines imaginarity as a resource in quantum information theory. The authors extend the resource theory of imaginarity to distributed scenarios, discuss the operational meaning and its role in channel discrimination.
- Subjects
QUANTUM information theory; QUANTUM states; QUBITS; INFORMATION resources; DISTILLATION
- Publication
Communications Physics, 2024, Vol 7, Issue 1, p1
- ISSN
2399-3650
- Publication type
Article
- DOI
10.1038/s42005-024-01649-y