US 12,217,131 B2
Identifying minimum-energy resonance region at Majorana island
Parsa Bonderson, Santa Barbara, CA (US); David Alexander Aasen, Santa Barbara, CA (US); Christina Paulsen Knapp, Goleta, CA (US); and Roman Bela Bauer, Santa Barbara, CA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jun. 15, 2023, as Appl. No. 18/335,624.
Prior Publication US 2024/0419999 A1, Dec. 19, 2024
Int. Cl. G06N 10/20 (2022.01); G06N 10/40 (2022.01)
CPC G06N 10/20 (2022.01) [G06N 10/40 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A computing system comprising:
a quantum computing device including:
a Majorana island at which a plurality of Majorana zero modes (MZMs) are instantiated;
a quantum dot (QD) configured to be electrically connectable to the Majorana island via an MZM of the plurality of MZMs;
an electrical ground; and
a capacitance sensor; and
a controller configured to:
in each of a plurality of sampling iterations, control the quantum computing device to:
electrically couple the Majorana island to the electrical ground while a first plunger gate located proximate to the Majorana island is set to an idle voltage;
disconnect the Majorana island from the electrical ground;
electrically couple the Majorana island to the QD;
via the capacitance sensor, scan over a plurality of values of a first plunger gate voltage applied to the first plunger gate and a second plunger gate voltage applied to a second plunger gate located proximate to the QD; and
output, to the controller, respective quantum capacitance measurements obtained at the plurality of values of the first plunger gate voltage and the second plunger gate voltage;
receive the quantum capacitance measurements;
based at least in part on the quantum capacitance measurements, determine a measured distribution of a respective plurality of resonance regions associated with the sampling iterations;
based at least in part on the measured distribution, identify a minimum-energy resonance region of the plurality of resonance regions that corresponds to a minimum energy value of the Majorana island; and
output the minimum-energy resonance region identification.