The advent of noisy intermediate-scale quantum (NISQ) technology is changing rapidly the
landscape and modality of research in quantum physics. NISQ devices, such as the IBM Q …

Quantum metrology overcomes standard precision limits and plays a central role in science
and technology. Practically, it is vulnerable to imperfections such as decoherence. Here we …

Single-qubit thermometry presents the simplest tool to measure the temperature of thermal
baths with reduced invasivity. At thermal equilibrium, the temperature uncertainty is linked to …

Quantum computers have recently become available as noisy intermediate-scale quantum
devices. Already these machines yield a useful environment for research on quantum …

Markovian master equations, often called Liouvillians or Lindbladians, are used to describe
decay and decoherence of a quantum system induced by that system's environment. While a …

We propose and experimentally demonstrate an efficient framework for the quantum
simulation of quantum channels in nuclear magnetic resonance (NMR). Our approach relies …

Abstract In Xin et al (2017 Phys. Rev. A 96 062303) and Wei et al (2018 Sci. China Phys.
Mech. Astron. 61 70311), the authors reported an algorithm to simulate, in a circuit-based …

In the classical world, physical events always happen in a fixed causal order. However, it
was recently revealed that quantum mechanics allows events to occur with indefinite causal …

Pauli channels are fundamental in the context of quantum computing as they model the
simplest kind of noise in quantum devices. We propose a quantum algorithm for simulating …

Constructing all extreme instances of the set of completely positive trace-preserving (CPTP)
maps, ie, quantum channels, is a challenging and valuable open problem in quantum …