The New Quantum Era

Professor Zoe Holmes from EPFL in Lausanne, Switzerland, discusses her work on quantum imaginary time evolution and variational techniques for near-term quantum computers. With a background from Imperial College London and Oxford, Holmes explores the limits of what can be achieved with NISQ (Noisy Intermediate-Scale Quantum) devices.

Key topics covered:

• Quantum Imaginary Time Evolution (QITE) as a cooling-inspired algorithm for finding ground states
• Comparison of QITE to Variational Quantum Eigensolver (VQE) approaches
• Challenges in variational methods, including barren plateaus and expressivity concerns
• Trade-offs between circuit depth, fidelity, and practical implementation on current hardware
• Potential for scientific value from NISQ-era devices in physics and chemistry applications
• The interplay between classical and quantum methods in advancing our understanding of quantum systems