Quantum many-body simulation using monolayer exciton-polaritons in coupled-cavities

Area of Science:

• Quantum physics
• Condensed matter physics
• Materials science

Background:

• Quantum simulation offers a path to understanding complex many-body systems.
• Photon-based quantum simulators excel in measuring correlations and simulating non-equilibrium physics.
• Existing photonic systems suffer from weak interparticle interactions, hindering quantum simulation capabilities.

Purpose of the Study:

• To propose a novel approach for enhancing interparticle interactions in photonic quantum simulators.
• To investigate the use of exciton-polaritons in MoS2 monolayer quantum dots for stronger interactions.
• To explore quantum simulation of strongly correlated systems and 1D superlattices.

Main Methods:

• Utilized exciton-polaritons in MoS2 monolayer quantum dots within 2D photonic crystal microcavities.
• Performed realistic calculations to determine optimal interaction regimes and quantum dot sizes.
• Employed exact diagonalization of the many-body Hamiltonian to study quantum simulation scenarios.

Main Results:

• Achieved optimal repulsive interactions in the 1-10 meV range, an order of magnitude greater than current standards.
• Identified a crossover regime with a moderate quantum dot radius (~20 nm) as key for strong interactions.
• MoS2 demonstrated the strongest optimal repulsive interaction among common optoelectronic materials.

Conclusions:

• The proposed method significantly enhances interparticle interactions for quantum simulation.
• Transition metal dichalcogenide monolayer quantum dots offer advantages over conventional emitters for experimental realization.
• This work paves the way for more powerful photonic quantum simulators.