Sudden Transition between Classical to Quantum Decoherence in bipartite correlated Qutrit Systems

Area of Science:

• Quantum Information Science
• Quantum Many-Body Systems
• Quantum Foundations

Background:

• Investigating decoherence is crucial for understanding the transition from quantum to classical behaviors.
• Bell-diagonal states in bipartite systems present challenges in analyzing decoherence dynamics.
• Mixed quantum systems require careful examination of both classical and quantum correlations.

Purpose of the Study:

• To analyze the classical to quantum decoherence transition in three-dimensional bipartite mixed quantum systems.
• To explore the role of initial conditions in the dynamics of classical and quantum correlations.
• To offer an alternative explanation for decoherence freezing using tripartite systems.

Main Methods:

• Numerical calculations utilizing entropic and geometric measures of correlations.
• Analysis of three-dimensional bipartite AB mixed quantum systems.
• Extension of the bipartite system to a pure tripartite A⊗B⊗C system.

Main Results:

• A sudden transition between classical and quantum decoherence is observed, contingent on initial states.
• The dynamics of classical and quantum correlations exhibit this transition.
• Freezing of classical correlations in the AB bipartition is linked to entanglement freezing in the AC bipartition.

Conclusions:

• The study demonstrates a tunable classical-to-quantum decoherence transition in bipartite systems.
• Entanglement dynamics in extended tripartite systems provide insights into correlation freezing.
• This research contributes to understanding decoherence and correlation behavior in quantum systems.