Work

Dissipation in fermionic two-body continuous-time quantum walk under the steepest entropy ascent formalism

Year: 2025

Type: article

Abstract: Quantum walks play a crucial role in quantum algorithms and computational problems. Many-body quantum walks can reveal and exploit quantum correlations that are unavailable for single-walker cases. Studying quantum walks under noise and dissipation, particularly in multiwalker systems, has significant implications. In this context, we use a thermodynamically consistent formalism of dissipation modeling, namely the steepest entropy ascent (SEA) formalism. We analyze two spinless fermionic continuous-time walkers on a one-dimensional graph with tunable Hubbard and extended Hubbard-like interactions. By contrasting SEA-driven dynamics with unitary evolution, we systematically investigate how interaction strengths modulate thermalization and entropy production. Our findings highlight the relevance of the SEA formalism in modeling nonlinear dissipation in many-body quantum systems and its implications for quantum thermalization.

Source: Physical review. E

DOI: 10.1103/ftsw-cwbq

Authors: Rohit Kishan Ray, R. Srikanth, Sonjoy Majumder

Institutions: Poornaprajna Institute of Scientific Research, Institute for Basic Science, Indian Institute of Technology Kharagpur

Language: English

Topic: Advanced Thermodynamics and Statistical Mechanics

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Institute for Basic Science, Science and Engineering Research Board

Awards: G1369937091, G2278161163