Spin Based Heat Engine: Demonstration of Multiple Rounds of Algorithmic Cooling

2007/06/30 by C. A. Ryan, Colm A. Ryan, O. Moussa +5 · 2 citations
Chemistry · Computer Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Chemistry #Computer science #Physics #Polarization (electrochemistry) #Quantum #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum computer #Quantum information #Quantum mechanics #Qubit #Reset (finance) #quant-ph

paper · pdf · doi:10.1103/physrevlett.100.140501

published as Phys. Rev. Lett. 100, 140401 (2008) · 6 pages, 4 figures, improved content due to referee critique

openalex publication_date 2008/04/09 · arxiv created 2008/04/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We experimentally demonstrate multiple rounds of heat-bath algorithmic cooling in a 3 qubit solid-state nuclear magnetic resonance quantum information processor. By pumping entropy into a heat bath, we are able to surpass the closed system limit of the Shannon bound and purify a single qubit to 1.69 times the heat-bath polarization. The algorithm combines both high fidelity coherent control and a deliberate interaction with the environment. Given this level of quantum control in systems with larger reset polarizations, nearly pure qubits should be achievable.

Citations

• Algorithmic cooling and scalable NMR quantum computers
• NMR techniques for quantum control and computation
• Solid-state NMR three-qubit homonuclear system for quantum-information processing: Control and characterization
• The Physical Implementation of Quantum Computation

Cited by

• Heat-bath algorithmic cooling with correlated qubit-environment interactions
• Strong algorithmic cooling in large star-topology quantum registers