Probing quantum phase transitions in a spin chain with a double quantum dot
Probing quantum phase transitions in a spin chain with a double quantum dot
Quantum phase transitions (QPTs) in qubit systems are known to produce singularities in the entanglement, which could in turn be used to probe the QPT. Recent proposals have suggested that the QPT in a spin chain could be probed via the entanglement between external qubits coupled to the spin chain. …