6 papers
Bounding the entanglement of a state from its spectrum
Jofre Abellanet-Vidal, Guillem Müller-Rigat, Albert Rico +1
We introduce a framework to upper bound the entanglement content of a bipartite quantum state from its spectrum alone. Using linear maps and their inverses, we derive rigorous cons…
Absolutely maximally entangled pure states of multipartite quantum systems
Grzegorz Rajchel-MieldzioÄ, RafaÅ BistroÅ, Albert Rico +2
Absolutely maximally entangled (AME) pure states of a system composed of parties are distinguished by the property that for any splitting at least one partial trace is maximall…
Robust certification of high-dimensional quantum devices
Javier Fernández, Albert Rico, David Viedma +6
Certifying quantum behavior from classically accessible data is essential for secure communication and scalable quantum technologies. While powerful certification methods such as B…
Threshold entanglement sharing: quantum states with absolutely separable marginals
Albert Rico, Jofre Abellanet-Vidal, Naga Bhavya Teja Kothakonda +2
Motivated to understand how entanglement resources can be distributed in quantum networks, we introduce threshold entanglement (TE) states. These are multipartite quantum states wh…
Certifying nonlocal properties of noisy quantum operations
Albert Rico, Moisés Bermejo Morán, Fereshte Shahbeigi +1
Certifying quantum properties from the probability distributions they induce is an important task for several purposes. While this framework has been largely explored and used for…
Discrete dynamics in the set of quantum measurements
Albert Rico, Karol Życzkowski
A quantum measurement, often referred to as positive operator-valued measurement (POVM), is a set of positive operators summing to identity, $\sum_jP_j=\mathbb{…