Measurement-altered criticality: theory, experiments and quantum applications
Sara Murciano (LPTMS)
Quantum critical systems constitute appealing platforms for the exploration of novel measurement-induced phenomena due to their innate sensitivity to perturbations. I will discuss the impact of measurement on Ising chains using an explicit protocol, whereby uncorrelated ancillae are entangled with the critical chain and then projectively measured. I will identify different protocols wherein measurements (i) weakly modify the universal long-range entanglement and (ii) they completely obliterate it. I will also highlight a path to experimental realization in analog quantum simulators based on Rydberg atom arrays. Finally, I will describe how these ideas can establish a long-term quantum science application of ‘measurement-altered quantum criticality’.