Neutral atom quantum computer

<p>A neutral atom quantum computer is a <a href="/facts/List_of_proposed_quantum_registers/CHBrfLfW">modality of quantum computers</a>  built out of <a href="/facts/Rydberg_atom/yUrerWYz">Rydberg atoms</a>; this modality has many commonalities with <a href="/facts/Trapped-ion_quantum_computer/mNI1BcLP">trapped-ion quantum computers</a>. As of December 2023, the concept has been used to demonstrate a 48 <a href="/facts/Physical_and_logical_qubits/yQ1GfQhf">logical qubit</a> processor.
</p><p>To perform computation, the atoms are first trapped in a <a href="/facts/Magneto-optical_trap/thqk1QsG">magneto-optical trap</a>. Qubits are then encoded in the <a href="/facts/Energy_level/66x51Khc">energy levels</a> of the atoms. Initialization and operation of the computer is performed via the application of <a href="/facts/Lasers/jk6PTvvT">lasers</a> on the qubits.  For example, the laser can accomplish arbitrary single qubit gates and a 
  
    
      
        C
        Z
      
    
    {\displaystyle CZ}
  
 gate for <a href="/facts/Quantum_logic_gate/EFV5sPCU">universal quantum computation</a>. 
The 
  
    
      
        C
        Z
      
    
    {\displaystyle CZ}
  
 gate is carried out by leveraging the <a href="/facts/Rydberg_atom/yUrerWYz">Rydberg blockade</a> which leads to strong interactions when the qubits are physically close to each other. To perform a 
  
    
      
        C
        Z
      
    
    {\displaystyle CZ}
  
 gate a Rydberg 
  
    
      
        π
      
    
    {\displaystyle \pi }
  
 pulse is applied to the control qubit, a 
  
    
      
        2
        π
      
    
    {\displaystyle 2\pi }
  
 on the target qubit and then a 
  
    
      
        π
      
    
    {\displaystyle \pi }
  
 on the control.  <a href="/facts/Quantum_measurement/VY7jPfP0">Measurement</a> is enforced at the end of the computation with a <a href="/facts/Image_sensor/j3GNrRln">camera</a> that generates an image of the outcome by measuring the fluorescence of the atoms.
</p>

Neutral atom quantum computer open-in-new

Neutral atom quantum computer