[HN Gopher] Optical effect advances quantum computing with atomi...
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       Optical effect advances quantum computing with atomic qubits to a
       new dimension
        
       Author : FinnKuhn
       Score  : 47 points
       Date   : 2023-12-02 00:22 UTC (22 hours ago)
        
 (HTM) web link (www.tu-darmstadt.de)
 (TXT) w3m dump (www.tu-darmstadt.de)
        
       | major4x wrote:
       | Does anybody know how the coupling between the individual qubits
       | is achieved/configured?
        
         | staunton wrote:
         | It sounds like the article focuses on trapping...
        
         | FinnKuhn wrote:
         | You can find the paper here, maybe that helps:
         | https://arxiv.org/abs/1902.05424
        
           | westurner wrote:
           | "Scalable multilayer architecture of assembled single-atom
           | qubit arrays in a three-dimensional Talbot tweezer lattice"
           | (2023) https://arxiv.org/abs/1902.05424
        
       | noobermin wrote:
       | So this is a potentially useful innovation but this doesn't solve
       | the largest issue with decoherence which is the actual
       | bottleneck.
        
         | glitchc wrote:
         | One incremental step at a time. It took ~50 years from their
         | discovery before transistors could be mass produced.
        
           | dekhn wrote:
           | 20 years from the first idea to working example, not 50, and
           | was in scaled production only 10 years later. Perhaps would
           | have been faster if vacuum tubes hadn't been so successful.
           | 
           | I think it's time to conclude that quantum computer is just
           | significantly harder than transistors for computing.
        
             | glitchc wrote:
             | We have working single qubits today. Just not millions of
             | them. Much of it has to do with investment. Previous govts
             | poured a great deal of money into transistors. It's mainly
             | private funding for quantum. Even private isn't the same
             | scale as Bell Labs, adjusting for inflation.
        
             | willy_k wrote:
             | Who's claiming it's not significantly harder? That is a bad
             | reason to give up, if that's what you're advocating for.
        
         | sp332 wrote:
         | Getting to tens of thousands of qubits is very helpful for
         | quantum error correction schemes. That can help mitigate
         | decoherence.
        
         | packetlost wrote:
         | I believe the decoherence times for atomic qubits (at least
         | neutral atom) is much higher than that of trapped ions or
         | superconducting, on the order of seconds.
        
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       (page generated 2023-12-02 23:02 UTC)