Graduation Year

2026

Date of Submission

4-2026

Document Type

Campus Only Senior Thesis

Degree Name

Bachelor of Arts

Department

Physics

Reader 1

Trung Phan

Reader 2

Daniel Firoozi

Abstract

This work studies how measurement type affects information extraction in entangled quantum systems. Local measurements probe subsystems individually, while entangled measurements access global correlations. Information is quantified using Shannon and Rényi entropy. Bell states are used as a baseline, and the analysis is extended to GHZ and W states for systems of up to five qubits. Decoherence is introduced by suppressing phase coherence in the density matrix. The results show that entangled measurements provide maximal information in coherent systems but lose this advantage with decoherence. GHZ states exhibit system-size independent behavior, while W states depend on the number of qubits and display a peak in entropy at intermediate decoherence. This highlights the importance of entanglement structure in determining how information behaves in quantum systems.

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This thesis is restricted to the Claremont Colleges current faculty, students, and staff.

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