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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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Entangling Two Individual Atoms of Different Isotopes via Rydberg Blockade.

Yong Zeng1,2,3, Peng Xu1,2, Xiaodong He1,2

  • 1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.

Physical Review Letters
|November 4, 2017
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Summary
This summary is machine-generated.

Researchers achieved the first controlled-not (CNOT) quantum gate and entanglement using two different atomic isotopes. This breakthrough in quantum computing demonstrates minimal crosstalk between atom qubits, paving the way for advanced simulations.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Quantum gates are fundamental operations in quantum computing.
  • Entanglement is a key resource for quantum information processing.
  • Utilizing different atomic isotopes presents unique challenges and opportunities for quantum control.

Purpose of the Study:

  • To experimentally realize a controlled-not (CNOT) quantum gate using two individual atoms of different isotopes.
  • To demonstrate entanglement between these distinct atomic qubits.
  • To assess the cross talk between the atom qubits.

Main Methods:

  • Employed a strong Rydberg blockade mechanism.
  • Used two different rubidium isotopes (^87Rb and ^85Rb) confined in separate optical traps.
  • Traps were separated by a distance of 3.8 micrometers.

Main Results:

  • Achieved the first experimental realization of a CNOT gate and entanglement for two individual atoms of different isotopes.
  • Demonstrated negligible cross talk between the two atom qubits.
  • Reported raw fidelities of 0.73±0.01 for the CNOT gate and 0.59±0.03 for entanglement.

Conclusions:

  • The successful implementation of a CNOT gate and entanglement with different atomic isotopes is a significant advancement.
  • The negligible cross talk indicates high-fidelity control.
  • This work has potential applications in many-body system simulations, quantum computing, and quantum metrology.