Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain

• Autor: Tennant, D. M. ; Dai, X. ; Martinez, A. J. ; Trappen, R. ; Melanson, D. ; Yurtalan, M. A. ; Tang, Y. ; Bedkihal, S. ; Yang, R. ; Novikov, S. ; Grover, J. A. ; Disseler, S. M. ; Basham, J. I. ; Das, R. ; Kim, D. K. ; Melville, A. J. ; Niedzielski, B. M. ; Weber, S. J. ; Yoder, J. L. ; Kerman, A. J. ; Mozgunov, E. ; Lidar, D. A. ; Lupascu, A.
• Assuntos: Annealing ; Connectivity ; Laboratories ; Phase transitions ; Physics - Condensed matter physics, Physics - Classical and quantum mechanics, general physics ; Quantum computing
• É parte de: npj quantum information, 2022-07, Vol.8 (1), p.1-9, Article 85
• Notas: AC52-07NA27344
  LLNL-JRNL-827623
  USDOE National Nuclear Security Administration (NNSA)
  
• Descrição: Abstract Spin chains have long been considered an effective medium for long-range interactions, entanglement generation, and quantum state transfer. In this work, we explore the properties of a spin chain implemented with superconducting flux circuits, designed to act as a connectivity medium between two superconducting qubits. The susceptibility of the chain is probed and shown to support long-range, cross-chain correlations. In addition, interactions between the two end qubits, mediated by the coupler chain, are demonstrated. This work has direct applicability in near term quantum annealing processors as a means of generating long-range, coherent coupling between qubits.
  
• Editor: London: Nature Publishing Group
  
• Idioma: Inglês