Quantum theory is traditionally formulated using complex numbers. This imaginarity of
quantum theory has been quantified as a resource with applications in discrimination tasks …

Imaginarity has proven to be a valuable resource in various quantum information processing
tasks. A natural question arises: can the imaginarity of quantum states be broadcast via real …

Self-testing is a promising approach to certifying quantum states or measurements.
Originally, it relied solely on the outcome statistics of the measurements involved in a device …

We improve the test to show the impossibility of a quantum theory based on real numbers by
a larger ratio of complex-to-real bound on a Bell-type parameter. In contrast to previous …

The imaginary in quantum theory plays a crucial role in describing quantum coherence and
is widely applied in quantum information tasks such as state discrimination …

Imaginarity is a valuable resource in quantum information processing. While quantifying it
often requires state tomography, detecting imaginarity alone is often sufficient. This work …

The nonlocality arising in a multi-party network involving multiple independent sources
radically differs from the standard multipartite Bell nonlocality involving a single source. The …

Complex numbers are widely used in quantum physics and are indispensable components
for describing quantum systems and their dynamical behavior. The resource theory of …