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quant-ph2024
Measuring Butterfly Velocity in the XY Model on Emerging Quantum Computers
Calum McCartney, Eric Chen, Subhayan Roy Moulik
The butterfly velocity is commonly used to understand information transport properties in quantum dynamical systems and is related to growth of operators. Here we utilise a quantum…
quant-ph2024
DQC1-hardness of estimating correlation functions
Subhayan Roy Moulik, Sergii Strelchuk
Out-of-Time-Order Correlation function measures transport properties of dynamical systems. They are ubiquitously used to measure quantum mechanical quantities, such as scrambling t…
quant-ph2019
Purification and time-reversal deny entanglement in LOCC-distinguishable orthonormal bases
Stefano Gogioso, Subhayan Roy Moulik
We give a simple proof, based on time-reversibility and purity, that a complete orthonormal family of pure states which can be perfectly distinguished by LOCC cannot contain any en…