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Digital Quantum Simulation of the Spin-Boson Model under Markovian Open-System Dynamics
Andreas Burger1,2,3, Leong Chuan Kwek3,4,5, Dario Poletti2,3,4,6,7
1Faculty of Physics, Ludwig-Maximilians-Universität Munich, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
Simulating open quantum dynamics on digital quantum computers is feasible. Researchers found that focusing on the unitary part of the spin-boson model simulation enhances accuracy, while dissipation aids noise resistance.
Area of Science:
- Quantum Computing
- Quantum Simulation
- Condensed Matter Physics
Background:
- Digital quantum computers offer a path to simulating complex quantum systems.
- The spin-boson model is a fundamental framework applicable across various scientific domains.
- Open quantum systems interact with their environment, leading to phenomena like state decay.
Purpose of the Study:
- To investigate the simulation of open quantum dynamics using a digital quantum computer.
- To assess the accuracy of different simulation implementations on noisy IBM hardware.
- To analyze the impact of hardware noise and open dynamics parameters on simulation fidelity.
Main Methods:
- Utilized a digital quantum computer (IBM hardware) for simulations.
- Implemented various approaches to simulate the evolution of open quantum systems.
- Studied both single-spin and two-spin systems coupled to a harmonic oscillator.
Main Results:
- The fidelity of open quantum dynamics simulation is sensitive to hardware noise.
- Simulating the unitary component of the dynamics is crucial for accuracy.
- The dissipative part of the dynamics can contribute to noise-resistant simulations.
- Successfully simulated the emergence of spin correlations mediated by a harmonic oscillator.
Conclusions:
- Digital quantum computers can effectively simulate open quantum dynamics.
- Strategic implementation focusing on unitary evolution is key for accurate simulations.
- Dissipative dynamics can offer a pathway to more robust quantum simulations in noisy environments.
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