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Universal Quantum Computation in Globally Driven Rydberg Atom Arrays.

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We developed a new quantum computation model using Rydberg atom arrays that avoids local qubit control. This global driving approach simplifies quantum processor design and error suppression strategies.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Quantum computation typically requires precise local control of individual qubits.
  • Rydberg atoms offer a promising platform for quantum computing due to strong interactions.
  • Implementing complex quantum circuits often necessitates sophisticated control mechanisms.

Purpose of the Study:

  • To develop a quantum computation model for Rydberg atom arrays using only global driving.
  • To eliminate the need for local qubit addressing in quantum processors.
  • To demonstrate a universal quantum processor with reduced control complexity.

Main Methods:

  • Developing a model based on global, resonant laser pulses on static atomic arrangements.
  • Presenting two constructions: one imprinting circuits in trap positions, another encoding algorithms in driving sequences.
  • Utilizing dual-species Rydberg atom processors with Rydberg blockade constraints.

Main Results:

  • A quadratic overhead in atom number is sufficient to achieve universal quantum computation without local control.
  • Explicit protocols for all steps of arbitrary quantum computations are provided.
  • Strategies for error suppression specific to the global driving model are discussed.

Conclusions:

  • The proposed global driving model significantly simplifies the architecture of quantum processors.
  • This approach offers a viable pathway towards scalable and robust quantum computation.
  • The model's principles may be transferable to other quantum computing platforms.