Adam Lowe

Quantum computing has huge promise from a technical perspective, but the practical benefits are less clear.

The way nature works in our life is described as classical physics

Google and the XPrize Foundation have launched a competition worth US$5 million to develop real-world applications for quantum computers that benefit

Hear from Cllr Adam Lowe, who was elected as Oakham Mayor in May, about his first month in office in an exclusive with Oakham Nub News. Image credit: Oakham Nub News.

Last week's D-Day events raised much needed funds for the Royal British Legion Poppy appeal and welcomed nearly 200 residents to mark 80 years since the invasion of Normandy.

In this article, we explore a feedback-control protocol in different quantum field theories (QFTs) to study the quantum correlation in nonunitary evolution of quantum systems. Traditional studies on QFTs focus on quantum entanglement of pure states under the unitary evolution, however, we examine quantum correlation in mixed states using quantum energy teleportation (QET), which is an energy transfer protocol by utilizing ground state entanglement, and introduce quantum discord as a measure. QET involves a midcircuit measurement, which disrupts pure state entanglement. Despite this, our analysis demonstrates that quantum discord maintains the correlation throughout the QET process. We conducted numerical analyses with benchmark models including the Nambu-Jona-Lasinio (NJL) model, revealing that quantum discord consistently acts as an order parameter for phase transitions. The model is extended in a way that it has both the chiral chemical potential and the chemical potential, which are useful to study the phase structures mimicking the chiral imbalance between left- and right- quarks coupled to the chirality density operator. In all cases we studied, the quantum discord behaved as an order parameter of the phase transition.