Condensed Matter Physics, 2020, vol. 23, No. 4, 43001
DOI:10.5488/CMP.23.43001

Title: Preparation and study of the entanglement of the Schrödinger cat state on the ibmq-melbourne quantum computer
Author(s):
  A.R. Kuzmak (Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov St., 79005 Lviv, Ukraine),
  V.M. Tkachuk (Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov St., 79005 Lviv, Ukraine)

We study the entanglement between a certain qubit and the remaining system in the Schrödinger cat state prepared on the ibmq-melbourne quantum computer. The protocol, which we use for this purpose, is based on the determination of the mean value of spin corresponding to a certain qubit. We explore the dependence of the entanglement on a parameter of the Schrödinger cat state which consists of different numbers of qubits. In addition, we explore the entanglement of each qubit with the remaining system in the maximum entangled Schrödinger cat state.

Key words: Schrödinger cat state, entanglement, quantum computer


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