225 citations · 739 across the 13 of their papers we have counts for
12 papers · 1 filter
Purification enables an unbounded query separation in sequential quantum channel discrimination
Zoe G. del Toro, Marco Túlio Quintino, Jessica Bavaresco
Purifications are often used as a convenient mathematical representation of quantum states and channels when constructing protocols for quantum information processing tasks. Althou…
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…
Semi-device-independent certification of indefinite causal order
Jessica Bavaresco, Mateus Araújo, Časlav Brukner +1
When transforming pairs of independent quantum operations according to the fundamental rules of quantum theory, an intriguing phenomenon emerges: some such higher-order operations…
Measurements in two bases are sufficient for certifying high-dimensional entanglement
Jessica Bavaresco, Natalia Herrera Valencia, Claude Klöckl +5
High-dimensional encoding of quantum information provides a promising method of transcending current limitations in quantum communication. One of the central challenges in the purs…
Operational framework for quantum measurement simulability
Leonardo Guerini, Jessica Bavaresco, Marcelo Terra Cunha +1
We introduce a framework for simulating quantum measurements based on classical processing of a set of accessible measurements. Well-known concepts such as joint measurability and…
Most incompatible measurements for robust steering tests
Jessica Bavaresco, Marco Túlio Quintino, Leonardo Guerini +3
We address the problem of characterizing the steerability of quantum states under restrictive measurement scenarios, i.e., the problem of determining whether a quantum state can de…
Distribution of high-dimensional entanglement via an intra-city free-space link
Fabian Steinlechner, Sebastian Ecker, Matthias Fink +5
Quantum entanglement is a fundamental resource in quantum information processing and its distribution between distant parties is a key challenge in quantum communications. Increasi…