Quantum simulations of a qubit of space
| Autor: | Jakub Mielczarek, Grzegorz Czelusta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
High Energy Physics - Theory Quantum geometry Quantum Physics 010308 nuclear & particles physics Magnetic monopole FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Loop quantum gravity 01 natural sciences General Relativity and Quantum Cosmology Gravitation High Energy Physics - Theory (hep-th) Qubit Quantum mechanics 0103 physical sciences Spin network Quantum Physics (quant-ph) 010306 general physics Quantum Quantum computer |
| Popis: | In loop quantum gravity approach to Planck scale physics, quantum geometry is represented by superposition of the so-called spin network states. In the recent literature, a class of spin networks promising from the perspective of quantum simulations of quantum gravitational systems has been studied. In this case, the spin network states are represented by graphs with four-valent nodes, and two dimensional intertwiner Hilbert spaces (qubits of space) attached to them. In this article, construction of quantum circuits for a general intertwiner qubit is presented. The obtained circuits are simulated on 5-qubit (Yorktown) and 15-qubit (Melbourne) IBM superconducting quantum computers, giving satisfactory fidelities. The circuits provide building blocks for quantum simulations of complex spin networks in the future. Furthermore, a class of maximally entangled states of spin networks is introduced. As an example of application, attempts to determine transition amplitudes for a monopole and a dipole spin networks with the use of superconducting quantum processor are made. 17 pages. Matches the version published in PRD |
| Databáze: | OpenAIRE |
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