US 11,893,452 B2 · Quantum circuit with tailored Rydberg states

Abstract

In the context of gate-model quantum computing, atoms (or polyatomic molecules) are excited to respective Rydberg states to foster intra-gate interactions. Rydberg states with relatively high principal quantum numbers are used for relatively distant intra-gate interactions and require relatively great inter-gate separations to avoid error-inducing inter-gate interactions. Rydberg states with relatively low principal quantum numbers can be used for intra-gate interactions over relatively short intra-gate distances and require relatively small inter-gate separations to avoid error-inducing inter-gate interactions. The relatively small inter-gate separations provide opportunities for parallel gate executions, which, in turn, can provide for faster execution of the quantum circuit constituted by the gates. By using Rydberg states with relatively high principal quantum numbers where required, and Rydberg states with relatively low principal quantum numbers where possible, an optimal tradeoff between intra-gate interaction flexibility and inter-gate parallelism can be achieved.

Claims16

Dependent claims

A quantum-circuit execution process comprising:

transitioning a first molecule of a first quantum gate of a quantum circuit from a first non-Rydberg state to a first Rydberg state, the first Rydberg state having a first principal quantum number;
and
transitioning a second molecule of a second quantum gate of the quantum circuit to transition from a second non-Rydberg state to a second Rydberg state, the second quantum gate being separate from the first quantum gate, the second Rydberg state having a second principal quantum number greater than the first principal quantum number wherein:
the first quantum gate is characterized by a first maximum connection distance over which molecules of the first quantum gate must, under a first plurality of certain conditions, interact, the first Rydberg state being based on the first maximum connection distance;
and
the second quantum gate is characterized by a second maximum connection distance over which molecules of the first quantum gate must, under a second plurality of certain conditions, interact, the second Rydberg state being based on the second maximum connection distance, the second maximum connection distance being greater than the first maximum connection distance.

3 more elements

A quantum-circuit product comprising non-transitory computer-readable media encoded with code that, when executed using a quantum processor, implements a quantum-circuit-execution process including:

transitioning a first molecule of a first quantum gate of a quantum circuit from a first non-Rydberg state to a first Rydberg state, the first Rydberg state having a first principal quantum number;
and
transitioning a second molecule of a second quantum gate of the quantum circuit to transition from a second non-Rydberg state to a second Rydberg state, the second quantum gate being separate from the first quantum gate, the second Rydberg state having a second principal quantum number greater than the first principal quantum number wherein:
the first quantum gate is characterized by a first maximum connection distance over which molecules of the first quantum gate must, under a first plurality of certain conditions, interact, the first Rydberg state being based on the first maximum connection distance;
and
the second quantum gate is characterized by a second maximum connection distance over which molecules of the first quantum gate must, under a second plurality of certain conditions, interact, the second Rydberg state being based on the second maximum connection distance, the second maximum connection distance being greater than the first maximum connection distance.

3 more elements

A quantum-circuit processor comprising:

means for transitioning a first molecule of a first quantum gate of a quantum circuit from a first non-Rydberg state to a first Rydberg state, the first Rydberg state having a first principal quantum number;
and
means for transitioning a second molecule of a second quantum gate of the quantum circuit to transition from a second non-Rydberg state to a second Rydberg state, the second quantum gate being separate from the first quantum gate, the second Rydberg state having a second principal quantum number greater than the first principal quantum number wherein:
the first quantum gate is characterized by a first maximum connection distance over which molecules of the first quantum gate must, under a first plurality of certain conditions, interact, the first Rydberg state being based on the first maximum connection distance;
and
the second quantum gate is characterized by a second maximum connection distance over which molecules of the first quantum gate must, under a second plurality of certain conditions, interact, the second Rydberg state being based on the second maximum connection distance, the second maximum connection distance being greater than the first maximum connection distance.

3 more elements

Dependencies are inferred from the claim text.

Quantum circuit with tailored Rydberg states

Life of this patent

Quantum circuit with tailored Rydberg states

Life of this patent

Abstract

Claims16