Monolithic 3D Microwave Cavity for Quantum Memory
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Solution Overview
Problem
Superconducting quantum computing systems face limitations due to loss and noise in quantum memory storage, which hinder the development of efficient quantum computing capabilities.
Innovation Solution
A device and method for creating a resonator with a monolithic block that supports long-lived 3D electromagnetic modes, featuring a seamless cavity defined by transverse holes, allowing for high-quality factor modes and integration of superconducting qubits to couple with these modes, thereby reducing noise and loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If superconducting quantum memory is used for qubit storage, then quantum computing capabilities can be demonstrated, but loss and noise in the quantum memory limit the system performance
Solution Approach 1:
The quantum memory system is segmented into multiple independent 3D cavity modes rather than using a single continuous medium. Each mode acts as an independent storage channel with its own quality factor, allowing selective optimization and reducing the impact of losses in any single mode on the overall system performance.
Solution Approach 2:
The patent changes the physical parameters of the cavity modes by varying the hole depths and positions to create modes with different quality factors and frequencies. This allows optimization of specific modes for long-term storage while others can be used for different purposes, effectively managing the loss and noise characteristics across the quantum memory system.
2Adaptability or versatility
If multiple electromagnetic modes are supported in a 3D cavity, then quantum computing operations can be performed, but maintaining low loss and high quality factor becomes challenging
Solution Approach 1:
Different regions of the 3D cavity are designed with different local properties by varying the hole configurations at different positions and depths. This creates localized mode confinement and allows each mode to have optimized quality characteristics independent of the others, enabling multiple modes to coexist with individually high quality factors.
Solution Approach 2:
The patent transitions from two-dimensional surface patterns to three-dimensional volumetric mode structures by controlling hole depths. This additional dimensional control allows independent optimization of mode frequencies and quality factors, enabling support for multiple electromagnetic modes while maintaining low loss through precise geometric control in the third dimension.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the creation of high-fidelity quantum computing operations by maintaining low loss and noise levels, supporting quality factors of at least ten million and enabling efficient quantum computing operations.
Implementation Method 1
the monolithic block may be at a temperature less than a superconducting temperature of the monolithic block
Implementation Method 2
a resonator comprising a monolithic block, a cavity that is defined in the monolithic block... supporting long-lived 3D electromagnetic modes
Data Source
AI summary
Technologies for a long-lived 3D multimode microwave cavity are disclosed. In the illustrative embodiment, a series of overlapping holes are drilled into a monolithic block of aluminum forming a cavity. The dimensions of the cavity formed by the overlapping holes can be made long by drilling a long series of holes in a row and can be made high by drilling holes a certain depth into the cavity. If two dimensions of the cavity are bigger than the diameter of the holes used to create the cavity, then the cavity can support electromagnetic waves that cannot propagate through the holes, leading to a long lifetime in the cavity. A superconducting qubit or other non-linear element can be inserted into the cavity, which can controllably interact with each of several modes of the cavity. In this way, the modes of the cavity can act as components in a quantum memory.