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Gradient Echo Quantum Memory in Warm Atomic Vapor

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Published on: November 11, 2013

Deriving quantum theory from its local structure and reversibility.

Gonzalo de la Torre¹, Lluís Masanes, Anthony J Short

¹ICFO-Institut de Ciències Fotòniques, E-08860 Castelldefels, Barcelona, Spain.

Physical Review Letters

|September 26, 2012

Summary

This summary is machine-generated.

We explored if dynamical reversibility in physical theories with quantum-like local structures could restore global quantum structure. For identical qubits, we found that reversible interactions necessitate the theory being identical to quantum theory.

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Area of Science:

Theoretical physics
Quantum information theory

Background:

Investigating physical theories beyond standard quantum mechanics.
Previous work showed bipartite correlations are quantum-shareable, but tripartite are not.

Purpose of the Study:

To determine if dynamical reversibility restores global quantum structure.
To analyze theories with quantum local structure but potentially different global structure.

Main Methods:

Exploring constraints on theories beyond quantum mechanics.
Analyzing dynamical reversibility in physical theories.
Focusing on the specific case of identical qubits.

Main Results:

Theories with quantum-like local structure and dynamical reversibility are constrained.
For identical qubits, a continuous reversible interaction implies the theory is quantum theory.

Conclusions:

Dynamical reversibility is a key constraint for theories mimicking quantum mechanics.
This constraint forces theories with quantum local structure to fully align with quantum theory for identical qubits.