期刊
PHYSICAL REVIEW A
卷 95, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.95.052339
关键词
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资金
- Austrian Science Fund (FWF) [Y535-N16, DK-ALM: W1259-N27]
- APIF grant of University of Barcelona
- [FIS2013-41757-P]
- Austrian Science Fund (FWF) [Y535] Funding Source: Austrian Science Fund (FWF)
The notion of compressed quantum computation is employed to simulate the Ising interaction of a one-dimensional chain consisting of n qubits using the universal IBM cloud quantum computer running on log(2)(n) qubits. The external field parameter that controls the quantum phase transition of this model translates into particular settings of the quantum gates that generate the circuit. We measure the magnetization, which displays the quantum phase transition, on a two-qubit system, which simulates a four-qubit Ising chain, and show its agreement with the theoretical prediction within a certain error. We also discuss the relevant point of how to assess errors when using a cloud quantum computer with a limited amount of runs. As a solution, we propose to use validating circuits, that is, to run independent controlled quantum circuits of similar complexity to the circuit of interest.
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