Entanglement entropy scaling in solid-state spin arrays via capacitance measurements

Understand

Solid-state spin arrays are being engineered in varied systems, including gated coupled quantum dots and interacting dopants in semiconductor structures.

• Beyond quantum computation, these arrays are useful integrated analog simulators for many-body models.
• As entanglement between individual spins is extremely short ranged in these models, one has to measure the entanglement entropy of a block in order to truly verify their many-body entangled nature.
• Remarkably, the characteristic scaling of entanglement entropy, predicted by conformal field theory, has never been measured.