19 papers
Theory of Measurement-Altered Criticality
Kabir Khanna, Sara Murciano, Romain Vasseur
Local measurements can alter long-range correlations in gapless quantum matter. We propose a theory of weakly-monitored Tomonaga-Luttinger liquids, a broad class of quantum critica…
Quantum sensing with critical systems: impact of symmetry, imperfections, and decoherence
Yinan Chen, Sara Murciano, Pablo Sala +1
Entangled many-body states enable high-precision quantum sensing beyond the standard quantum limit. We develop interferometric sensing protocols based on quantum critical wavefunct…
Higher-order Symmetric Quantum Mpemba Effect in Fragmented Systems
Sreemayee Aditya, Sara Murciano, Xhek Turkeshi
A quantum system can restore a broken symmetry faster the more strongly it initially breaks it, an anomaly known as the quantum Mpemba effect. Whether this effect survives once con…
Long-range deformations in Gaussian States
Francisco Pereira, Nandagopal Manoj, Sara Murciano
Imaginary-time evolution by a local Hamiltonian cannot induce a phase transition in one dimension, but longer-range interactions may subvert such constraints. Starting from the gro…
Quantum Fisher Information under decoherence with explicit wavefunctions
Francesco Musso, Vittorio Vitale, Sara Murciano
We present a method to estimate the quantum Fisher information (QFI) of many-body quantum states in the presence of decoherence, where its direct evaluation requires the full spect…
Enhancing entanglement asymmetry in fragmented quantum systems
Lorenzo Gotta, Filiberto Ares, Sara Murciano
Entanglement asymmetry provides a quantitative measure of symmetry breaking in many-body quantum states. Focusing on inhomogeneous charges, such as dipole and multipole mome…