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https://www.um.edu.mt/library/oar/handle/123456789/100139
Title: | Irreversible work versus fidelity susceptibility for infinitesimal quenches |
Authors: | Paganelli, Simone Apollaro, Tony John George |
Keywords: | Quantum computers Quantum systems Quantum physics |
Issue Date: | 2017 |
Publisher: | World Scientific Publishing Company |
Citation: | Paganelli, S., & Apollaro, T. J. (2017). Irreversible Work versus Fidelity Susceptibility for infinitesimal quenches. International Journal of Modern Physics B, 31(6), 1750065. |
Abstract: | We compare the irreversible work produced in an infinitesimal sudden quench of a quantum system at zero temperature with its ground state fidelity susceptibility, giving an explicit relation between the two quantities. We find that the former is proportional to the latter but for an extra term appearing in the irreversible work which includes also contributions from the excited states. We calculate explicitly the two quantities in the case of the quantum Ising chain, showing that at criticality they exhibit different scaling behaviors. The irreversible work, rescaled by square of the quench’s amplitude, exhibits a divergence slower than that of the fidelity susceptibility. As a consequence, the two quantities obey also different finite-size scaling relations. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/100139 |
Appears in Collections: | Scholarly Works - FacSciPhy |
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File | Description | Size | Format | |
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Irreversible work versus fidelity susceptibility for infinitesimal quenches.pdf Restricted Access | 402.65 kB | Adobe PDF | View/Open Request a copy |
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