Demonstration of Quantum Darwinism on Quantum Computer

Introduction

In the realm of quantum computing and information processing, environmental decoherence has often been perceived as a formidable obstacle. However, this phenomenon also plays an essential role in explaining the transition from quantum to classical states—a concept integral to understanding our universe at its most fundamental level. This blog delves into our recent research on demonstrating quantum Darwinism using a quantum computer, providing fascinating insights into the interplay between quantum systems and their environments.

Understanding Quantum Darwinism

Quantum Darwinism, introduced by Zurek in 2009, is a theory that elucidates how the classical objectivity of quantum systems emerges through decoherence introduced by the environment. This theory bridges the gap between the fragile quantum state and the robust classical state, shedding light on the fundamental processes that govern the quantum-to-classical transition.

Our Research Approach

Our study explores this phenomenon using an n-qubit generalized quantum circuit model. In this model, the first qubit represents the quantum system, while the remaining qubits are designated as environmental fragments. This setup allows us to simulate the interactions between a quantum system and its environment, providing a practical framework for observing quantum Darwinism in action.

Implementation on IBM Quantum Computers

We implemented our quantum circuit on IBM’s quantum computers, specifically ibmq_athens and ibmq_16_melbourne. By executing the quantum circuits on these platforms, we were able to observe and measure the interactions between the quantum system and the environment. To ensure the accuracy of our results, we employed quantum state tomography and enhanced our findings using quantum error mitigation procedures.

Key Findings

  1. Quantum-Classical Correlation: Our research investigated the quantum-classical correlation and the mutual information between the quantum system and the environment. By reconstructing the density matrices, we could analyze these interactions in detail.

  2. Environmental Fragment Size and Interaction Strength: The results from our noise-less simulator confirmed that the size of the environmental fragment and the interaction strength significantly influence the emergence of classicality. This finding aligns with the principles of quantum Darwinism, reinforcing the theory’s validity.

  3. Real Quantum Devices vs. Noise-less Simulators: While our noise-less simulator successfully demonstrated the principles of quantum Darwinism, the real quantum devices exhibited unaccountable behavior. This discrepancy highlights the current limitations and challenges in quantum computing, particularly in dealing with noise and decoherence in real-world applications.

Conclusion

Our research provides a compelling demonstration of quantum Darwinism on a quantum computer, offering valuable insights into the transition from quantum to classical states. The findings underscore the importance of environmental interactions in shaping the behavior of quantum systems, paving the way for future explorations in quantum information processing.

As we continue to advance in quantum computing technology, overcoming the challenges of noise and decoherence will be crucial. Nonetheless, our study represents a significant step forward in understanding the complex dynamics of quantum systems and their environments.

For a more detailed exploration of our research, you can read the full paper here.

Tags

#QuantumComputing #QuantumDarwinism #QuantumPhysics #QuantumDecoherence #QuantumInformation #IBMQuantum #ScientificResearch #Physics #QuantumClassicalTransition #TechInnovation #QuantumCircuits #EnvironmentalDecoherence #QuantumStateTomography #QuantumErrorMitigation


Read more here: https://bqblogs.blogspot.com/

Bikash's Quantum: https://sites.google.com/view/bikashsquantum

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