59 citations · 120 across the 5 of their papers we have counts for
12 papers
Exponential separation in quantum query complexity of the quantum switch with respect to simulations with standard quantum circuits
Hlér Kristjánsson, Tatsuki Odake, Satoshi Yoshida +4
Quantum theory is consistent with a computational model permitting black-box operations to be applied in an indefinite causal order, going beyond the standard circuit model of comp…
Simulating the quantum switch with quantum circuits is computationally hard
Jessica Bavaresco, Hlér Kristjánsson, Mio Murao +4
Higher-order transformations acting on input quantum channels in an indefinite causal order, such as the quantum switch, cannot be described by quantum circuits using the same numb…
Resource theory of causal connection
Simon Milz, Jessica Bavaresco, Giulio Chiribella
The capacity of distant parties to send signals to one another is a fundamental requirement in many information-processing tasks. Such ability is determined by the causal structure…
Activation of genuine multipartite entanglement: Beyond the single-copy paradigm of entanglement characterisation
Hayata Yamasaki, Simon Morelli, Markus Miethlinger +3
Entanglement shared among multiple parties presents complex challenges for the characterisation of different types of entanglement. One of the most fundamental insights is the fact…
Unitary channel discrimination beyond group structures: Advantages of sequential and indefinite-causal-order strategies
Jessica Bavaresco, Mio Murao, Marco Túlio Quintino
For minimum-error channel discrimination tasks that involve only unitary channels, we show that sequential strategies may outperform the parallel ones. Additionally, we show that g…
Strict hierarchy between parallel, sequential, and indefinite-causal-order strategies for channel discrimination
Jessica Bavaresco, Mio Murao, Marco Túlio Quintino
We present an instance of a task of minimum-error discrimination of two qubit-qubit quantum channels for which a sequential strategy outperforms any parallel strategy. We then esta…