Work

Engineering tunable decoherence-free subspaces with collective atom-cavity interactions

Year: 2025

Type: article

Abstract: We propose schemes to design and control a time-dependent decoherence-free subspace (DFS) in a dissipative atom-cavity system. These schemes use atoms with three internal energy levels, which allows for the DFS to be multidimensional---a condition important for quantum sensing, simulation, and computation. We consider the use of tunable external driving lasers to transfer the system from a coherent spin state to a highly degenerate DFS. We find that the typical state in the DFS is highly entangled. Throughout evolution the state is kept in an instantaneous DFS, thereby allowing for pure states to be prepared. We develop adiabatic shortcuts to carry out this evolution with higher purity and fidelity than standard adiabatic and dissipative methods.

Source: Physical Review A

DOI: 10.1103/physreva.111.033718

Authors: Lyryl H. C. Vaecairn, Jarrod T. Reilly, John Drew Wilson, Simon B. Jäger, Murray Holland

Institutions: Joint Institute for Laboratory Astrophysics, University of Colorado Boulder, University of Bonn

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy

Awards: Center: JILA-PFC: Comprehension and Control of Emerging Complexity at the Quantum Frontier, G463982086, QLCI-CI: NSF Quantum Leap Challenge Institute for Enhanced Sensing and Distribution Using Correlated Quantum States