Year: 2022
Type: article
Abstract: An important problem in quantum information is the practical demonstration of nonclassical long-range order on quantum computers. One of the best known examples of a quantum system with nonclassical long-range order is a superconductor. Here we achieve Cooper-like pairing of qubits on a quantum computer, which can be interpreted as superconducting or superfluid states via a Jordan-Wigner mapping. We rigorously confirm the quantum long-range order by measuring the large $O(N)$ eigenvalue of the two-electron reduced density matrix. The demonstration of maximal quantum long-range order is an important step toward more complex modeling of phenomena with significant quantum long-range order on quantum computers such as superconductivity and superfluidity.
Source: Physical Review Research
Authors: LeeAnn M. Sager, David A. Mazziotti
Institution: University of Chicago
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: CDS&E: Two-electron Reduced Density Matrices in Quantum Chemistry and Physics, G1673814530, QUANTUM COMPUTING ALGORITHMS AND APPLICATIONS FOR COHERENT AND STRONGLY CORRELATED CHEMICAL SYSTEMS, RAISE-QAC-QSA: Open Quantum Systems on Noisy Intermediate-Scale Quantum Devices, G3713422181, G5177007542, G518131803, G5895477941, Graduate Research Fellowship Program (GRFP), G8121373014, EAGER‐QAC‐QSA: Quantum Chemistry with Mean-field Cost from Semidefinite Programming on Quantum Computing Devices
OpenAlex ID: W4205664956