Table 1 Comparison of qubit counts for Jordan-Wigner encoding and qubit-efficient encoding for the tautomers of acetone and Edaravone.

From: Quantum simulation of preferred tautomeric state prediction

Molecule

Active Space Orbitals

(Electrons, MO)

JW Qubit Count

QEE Qubit Count

acetone

14-19

(4e, 6o)

12

8

propen-2-ol

14-19

(4e, 6o)

12

8

Edaravone (keto)

44-49

(4e, 6o)

12

8

Edaravone (enol)

44-49

(4e, 6o)

12

8

Edaravone (amine)

44-49

(4e, 6o)

12

8

  1. Calculations were done in the STO-3G basis sets and equilibrium bond distances with some molecular orbitals being frozen/removed. Note that the molecular orbital indices are ordered from the lowest to the highest energies and the indices start from 0.