Entangling Electrode Oscillating Magnetic Field Gradient for Quantum Fidelity
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Solution Overview
Problem
Existing quantum sensing and computing systems using trapped charged particles face challenges in achieving high fidelity in elementary logic operations and scaling to a larger number of qubits.
Innovation Solution
A method involving trapping a charged particle using an electromagnetic trap, applying a static magnetic field to define a qubit transition, and providing an oscillating magnetic field using an entangling electrode. The oscillating magnetic field has a spatial gradient that couples the qubit transition to the motion of the charged particle, without directly coupling to the qubit transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oscillating magnetic field is applied to couple to the qubit transition, then quantum operations can be performed, but direct coupling to the qubit transition reduces operation fidelity
Solution Approach 1:
The patent introduces the charged particle's motion as an intermediary between the oscillating magnetic field and the qubit transition. The oscillating magnetic field couples to the motion (via the gradient), and the motion in turn couples to the qubit transition, rather than allowing direct coupling between the field and qubit. This mediator approach enables quantum operations while maintaining fidelity.
Solution Approach 2:
The patent changes the spatial parameter of the magnetic field by introducing a gradient. Instead of a uniform oscillating magnetic field that would directly couple to the qubit transition, a gradient is applied so that the field varies in space, enabling coupling to motion through the spatial derivative while the particle experiences a nulled or reduced field at its position.
2Quantity of substance
If the system is scaled to accommodate more qubits, then quantum computing capability increases, but system complexity and control difficulty increase
Solution Approach 1:
The patent creates a universal entangling mechanism that can be applied to multiple qubits using the same basic components. The oscillating magnetic field with gradient can entangle any pair of charged particles in the trap, providing a scalable, multi-functional approach that doesn't require different mechanisms for each qubit pair.
Solution Approach 2:
The charged particles themselves serve as both the qubits and the mediators for entanglement. The particles' motion automatically couples to the oscillating magnetic field gradient, creating entanglement without requiring additional control mechanisms for each particle pair. The system uses the particles' own properties to achieve the entangling function.
3Reliability
If an oscillating magnetic field with gradient is applied to entangle particles, then quantum entanglement is generated, but the field may directly couple to the qubit transition reducing fidelity
Solution Approach 1:
The patent applies the oscillating magnetic field with a spatial gradient such that different locations experience different field strengths and orientations. At the position of each charged particle, the field is configured to have minimal coupling to the qubit transition, while the gradient provides sufficient coupling to the particle's motion for entanglement. This local optimization resolves the contradiction between entanglement generation and fidelity preservation.
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
This approach enables efficient generation of quantum entanglement between charged particles, improving the fidelity of quantum operations and facilitating scalability in quantum information processing.
Implementation Method 1
trapping a charged particle at a first position using an electromagnetic trap
Implementation Method 2
providing a static magnetic field at the first position such that a qubit transition of the charged particle is defined
Implementation Method 3
The oscillating magnetic field has a spatial gradient at the first position, of the polarisation component of the oscillating magnetic field which couples the qubit transition to the motion of the charged particle
Data Source
AI summary
A method is presented, which includes trapping a charged particle at a first position using an electromagnetic trap and providing a static magnetic field at the first position such that a qubit transition of the charged particle is defined, and providing, using an entangling electrode, an oscillating magnetic field. The oscillating magnetic field present at the first position does not contain a polarisation component which directly couples to the qubit transition. The oscillating magnetic field has a spatial gradient at the first position, of the polarisation component of the oscillating magnetic field which couples the qubit transition to the motion of the charged particle.