US 12,169,760 B2
Universal quantum computing using electro-nuclear wavefunctions of rare-earth ions
Gabriel Aeppli, Zürich (CH); Markus Müller, Arlesheim (CH); Manuel Grimm, Pratteln (CH); and Adrian Beckert, Othmarsingen (CH)
Assigned to Paul Scherrer Institut, Villigen (CH)
Appl. No. 18/041,575
Filed by Paul Scherrer Institut, Villigen (CH)
PCT Filed Jul. 29, 2021, PCT No. PCT/EP2021/071242
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2022/033881, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 20191158 (EP), filed on Aug. 14, 2020.
Prior Publication US 2023/0297870 A1, Sep. 21, 2023
Int. Cl. G06N 10/40 (2022.01)
CPC G06N 10/40 (2022.01) 3 Claims
OG exemplary drawing
 
1. A universal quantum computing system using electro-nuclear wavefunctions of rare-earth ions, the computing system comprising:
a) a 2D-matrix of rare-earth ions embedded in an insulating solid state matrix;
b) each of the rare-earth ions representing a nuclear qubit to be selectively operated as a passive qubit or as an active qubit;
c) the passive qubit being represented by a passive electronic doublet at a non-degenerate ground state, thereby storing quantum information in the two different nuclear spin states that are possible in the non-degenerate ground state, causing two different passive-state electro-nuclear wavefunctions; and
d) the active qubit being represented by an active electronic doublet at a non-degenerate excited state, thereby storing the quantum information in the two different nuclear spin states that are possible in the non-degenerate excited state, causing two different active-state electro-nuclear wavefunctions; and
e) a laser source for selectively generating laser pulses in order to optically excite the rare-earth ions from the non-degenerate ground state into the non-degenerate excited state and vice versa, thereby locally controlling an electronic dipolar interaction in a tunable manner among at least two active qubits; and
f) an external electric field in form of switchable electric gates for inducing a Stark shift for a selectable qubit; and
g) an external magnetic field.