Non-Adiabatic Ion-Pair Gates for Mixed-Species Qubit Swapping
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Solution Overview
Problem
Combining different qubit types in a single ion species is challenging due to the mismatch between atomic elements suitable for quantum communication and memory qubits, leading to difficulties in maintaining high fidelity during quantum information transfer.
Innovation Solution
Implementing non-adiabatic gates, such as state-dependent momentum kicks (SDKs), combined with fast manipulation of the trapping potential, to entangle and transfer quantum information between mixed species or isotopes ions, enabling faster and more reliable operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If adiabatic gates are used for quantum information transfer between mixed species qubits, then the operation can be performed, but the transfer speed is limited and fidelity is reduced
Solution Approach 1:
The patent changes the fundamental parameter of gate operation from adiabatic to non-adiabatic regime. By applying fast non-adiabatic gates with duration τgate ≪ Ttrap/10, the system achieves quantum information transfer speeds several orders of magnitude faster than decoherence time, while maintaining high fidelity through precise control of the trapping potential manipulation and laser parameters
2Adaptability or versatility
If different qubit types are combined in a single ion species, then quantum communication and memory functions can be integrated, but the mismatch between atomic elements leads to difficulty in maintaining high fidelity
Solution Approach 1:
The patent introduces non-adiabatic gates as an intermediary mechanism that bridges different qubit types (communication qubits and memory qubits) with different atomic elements. The fast non-adiabatic gate operation serves as a mediator that transfers quantum information between mixed species or isotopes ions without requiring them to be the same element, thereby achieving high fidelity transfer while maintaining the versatility of using different atomic elements for different functions
3Productivity
If non-adiabatic gates are used to transfer quantum information, then transfer speed increases significantly, but the complexity of controlling trapping potential and laser parameters increases
Solution Approach 1:
The patent employs dynamic manipulation of the trapping potential through time-varying voltages applied to ion trap electrodes. The non-adiabatic gate operation utilizes rapid switching between different trapping potentials (e.g., from a first trapping potential to a second trapping potential) to achieve fast quantum information transfer. This dynamic approach enables high throughput while the control complexity is managed through automated voltage sequencing and real-time parameter adjustment
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
Non-adiabatic gates allow for higher fidelity swap operations several orders of magnitude faster than decoherence time, overcoming limitations of adiabatic gates by utilizing laser and control electronics parameters, thus enhancing the speed and reliability of quantum information transfer.
Implementation Method 1
Implementing non-adiabatic gates, such as state-dependent momentum kicks (SDKs), combined with fast manipulation of the trapping potential, to entangle and transfer quantum information between mixed species or isotopes ions
Implementation Method 2
entangling at least a pair of interconnect qubits using photonic interconnects via a reconfigurable photonic entangler configured to entangle a pair of communication qubits from a plurality of quantum processing units (QPUs) such that photons entangled with interconnect qubit states are collected in optical fibers
Implementation Method 3
an ion trap configured to trap a first trapped ion of multiple arrays of trapped ions, the ion trap having a trapping potential that switchable between a first trapping potential and a second trapping potential
Data Source
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AI summary
Aspects of the present disclosure relate to interconnecting mixed species qubit entanglements with non-adiabatic gates. Methods include entangling at least a pair of interconnect qubits using photonic interconnects via a reconfigurable photonic entangler configured to entangle a pair of communication qubits from a plurality of quantum processing units (QPUs) such that photons entangled with interconnect qubit states are collected in optical fibers. Each QPU includes non-interconnect qubits, an interconnect qubit coupled to the reconfigurable photonic entangler with an optical fiber, and a non-adiabatic gate coupling the interconnect qubit to the plurality of non-interconnect qubits. Methods also include transferring information from the pair of entangled interconnect qubits to a respective non-communication qubit using the non-adiabatic gate. Methods further include executing at least one quantum computation on at least one of the plurality of QPUs using a non-interconnect qubit as a resource for at least one gate between the plurality of QPUs.