Quantum Device Emulates the Dynamics of Two Coupled Oscillators.

Area of Science:

• Quantum computing
• Molecular dynamics simulation
• Solid-state physics

Background:

• Quantum devices offer novel platforms for simulating complex physical systems.
• Understanding molecular vibrational dynamics is crucial in chemistry and materials science.
• Semiconducting quantum dots provide controllable quantum systems for experimental studies.

Purpose of the Study:

• To develop and validate a quantum device for emulating molecular vibrational dynamics.
• To utilize ultrafast spectroscopy for probing quantum system evolution.
• To simulate energy transfer and operator dynamics in a molecular system.

Main Methods:

• Fabrication of a solid-state quantum device using an array of semiconducting quantum dots.
• Addressing and reading the quantum device using 2D electronic spectroscopy.
• Simulating experimental ultrafast dynamics by solving the time-dependent Schrödinger equation.
• Emulating molecular vibrational dynamics using engineered electronic coherences.

Main Results:

• The quantum device successfully emulates the nonequilibrium vibrational dynamics of a linear triatomic molecule.
• Accurate simulation of energy transfer between local oscillators was achieved.
• Expectation values of quantum mechanical creation and annihilation operators were computed.
• The simulation leverages electronic coherences generated by specific ultrafast pulse sequences.

Conclusions:

• Quantum devices based on quantum dots can effectively emulate complex molecular dynamics.
• 2D electronic spectroscopy provides a powerful tool for controlling and reading quantum systems.
• This approach offers a new pathway for investigating molecular processes using quantum hardware.