Spintronics and quantum information science are two promising candidates for innovating
information processing technologies. The combination of these two fields enables us to build …

In both classical and quantum many-body physics, it is a core issue to characterize statistical
correlations among different degrees of freedom. From this point of view, a natural question …

The many-body physics at quantum phase transitions shows a subtle interplay between
quantum and thermal fluctuations, emerging in the low-temperature limit. In this review, we …

We demonstrate how quantum entanglement can be directly witnessed in the quasi-1D
Heisenberg antiferromagnet KCuF 3. We apply three entanglement witnesses—one tangle …

Bell's inequalities are described by the sums of correlations including non-commuting
observables in each of two systems. Bell's inequalities violation is possible since the …

We report an experimental investigation of quantum correlations in a two-qutrit spin system
in a single nitrogen-vacancy center in diamond at room temperatures. Quantum …

We address the effective generation of thermal non-classical correlations in two two-level
atoms when exposed to a Fock-state cavity incorporated with classical decoherence effects …

Recent experimental observation of weak ergodicity breaking in Rydberg atom quantum
simulators has sparked interest in quantum many-body scars—eigenstates which evade …

Hybrid quantum-classical algorithms have been proposed as a potentially viable application
of quantum computers. A particular example—the variational quantum eigensolver, or VQE …

We investigate heat engines whose working substance is made of two coupled qubits
performing a generalized Otto cycle by varying their applied magnetic field or their …