2020/06/30 by Robert J. Lewis-Swan, Sean R. Muleady, Ana Maria Rey +1 · 28 citations
Computer Science · Physics and Astronomy · #Adiabatic process #Coherence (philosophical gambling strategy) #Hamiltonian (control theory) #Ising model #Observable #Physics #Quantum #Quantum Information and Cryptography #Quantum discord #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Quantum phase transition #Spectroscopy and Quantum Chemical Studies #Statistical physics #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physrevlett.125.240605
published in Physical Review Letters 125(24), 240605 (American Physical Society) · 6 pages, 3 figures, and supplementary material; v5: updated affiliation, minor improvements to main manuscript
arxiv created 2020/10/27 · openalex publication_date 2020/12/10 · arxiv updated 2020/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We propose a new dynamical method to connect equilibrium quantum phase transitions and quantum coherence using out-of-time-order correlations (OTOCs). Adopting the iconic Lipkin-Meshkov-Glick and transverse-field Ising models as illustrative examples, we show that an abrupt change in coherence and entanglement of the ground state across a quantum phase transition is observable in the spectrum of multiple quantum coherence intensities, which are a special type of OTOC. We also develop a robust protocol to obtain the relevant OTOCs using quasi-adiabatic quenches through the ground state phase diagram. Our scheme allows for the detection of OTOCs without time reversal of coherent dynamics, making it applicable and important for a broad range of current experiments where time reversal cannot be achieved by inverting the sign of the underlying Hamiltonian.