Low-Dissipation Data Bus via Coherent Quantum Dynamics

Abstract

The transfer of information between two physical locations is an essential component of both classical and quantum computing. In quantum computing the transfer of information must be coherent to preserve quantum states and hence the quantum information. We establish a simple protocol for transferring one- and two-electron encoded logical qubits in quantum dot arrays. The theoretical energetic cost of this protocol is calculated - in particular, the cost of freezing and unfreezing tunnelling between quantum dots. Our results are compared with the energetic cost of shuttling qubits in quantum dot arrays and transferring classical information using classical information buses. Only our protocol can manage constant dissipation for any chain length. This protocol could reduce the cooling requirements and constraints on scalable architectures for quantum dot quantum computers.

10 pages, 6 figures

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Cited by in corpus (6)

• Complex Quantum Networks: a Topical Review
• Analytically Solvable Model for Qubit-Mediated Energy Transfer between Quantum Batteries
• Ergotopy transport in a one dimensional spin chain
• Many-body effects in a composite bosonic Josephson junction
• State Transfer in Noisy Modular Quantum Networks
• Transfer and routing of Gaussian states through quantum complex networks with and without community structure