Zobrazeno 1 - 10
of 397
pro vyhledávání: '"Chiribella, Giulio"'
Recent studies have shown that quantum information may be effectively transmitted by a finite collection of completely depolarizing channels in a coherent superposition of different orders, via an operation known as the quantum $\tt SWITCH$. Such res
Externí odkaz:
http://arxiv.org/abs/2407.02726
Accurate control of quantum states is crucial for quantum computing and other quantum technologies. In the basic scenario, the task is to steer a quantum system towards a target state through a sequence of control operations. Determining the appropri
Externí odkaz:
http://arxiv.org/abs/2406.05711
A fundamental property of quantum mechanics is that a single qubit can carry at most 1 bit of classical information. For an important class of quantum communication channels, known as entanglement-breaking, this limitation remains valid even if the s
Externí odkaz:
http://arxiv.org/abs/2405.17946
We introduce two quantitative measures of the strength of causal relations in general physical theories. These two measures called the maximum and minimum causal effect, capture the maximum and minimum changes in a physical system induced by changes
Externí odkaz:
http://arxiv.org/abs/2404.07683
Autor:
Giannelli, Lorenzo, Chiribella, Giulio
Information-theoretic insights have proven fruitful in many areas of quantum physics. But can the fundamental dynamics of quantum systems be derived from purely information-theoretic principles, without resorting to Hilbert space structures such as u
Externí odkaz:
http://arxiv.org/abs/2403.13223
Autor:
Liu, Zixuan, Chiribella, Giulio
Quantum theory is in principle compatible with processes that violate causal inequalities, an analogue of Bell inequalities that constrain the correlations observed by a set of parties operating in a definite causal order. Since the introduction of c
Externí odkaz:
http://arxiv.org/abs/2403.02749
Publikováno v:
Phys. Rev. Lett. 133, 120804 (2024)
We introduce the task of shadow process simulation, where the goal is to simulate the estimation of the expectation values of arbitrary quantum observables at the output of a target physical process. When the sender and receiver share random bits or
Externí odkaz:
http://arxiv.org/abs/2401.14934
Multipartite entanglement is a valuable resource for quantum technologies. However, detecting this resource can be challenging: for genuine multipartite entanglement, the detection may require global measurements that are hard to implement experiment
Externí odkaz:
http://arxiv.org/abs/2401.03367
Autor:
Chiribella, Giulio
Convex sets of quantum states and processes play a central role in quantum theory and quantum information. Many important examples of convex sets in quantum theory are spectrahedra, that is, sets of positive operators subject to affine constraints. T
Externí odkaz:
http://arxiv.org/abs/2311.10929
Publikováno v:
Phys. Rev. Research 6, 043043 (2024)
Weak values of quantum observables are a powerful tool for investigating quantum phenomena. Some methods for measuring weak values in the laboratory require weak interactions and postselection, while others are deterministic, but require statistics o
Externí odkaz:
http://arxiv.org/abs/2311.03941