Bounds on the minimum distance of additive quantum codes

Bounds on [[23,6]]₂

Construction

Construction of a [[23,6,6]] quantum code:
[1]:  [21, 8, 7] Quasicyclic of degree 3 Linear Code over GF(2^2)
     QuasiCyclicCode of length 21 stacked to height  2 with generating polynomials: 1,  x^5 + x^4 + x^2 + w*x + 1,  x^6 + x^5 + w^2*x^4 + w*x^3 + w*x^2 + w*x + w^2,  0,  x^6 + x^5 + x^4 + x^3 + x^2 + x + 1,  0
[2]:  [[22, 6, 6]] quantum code over GF(2^2)
     QuantumConstructionX applied to [1] with e = 1
[3]:  [[23, 6, 6]] quantum code over GF(2^2)
     ExtendCode [2] by 1

    stabilizer matrix:

      [1 0 0 0 0 0 0 0 1 0 1 0 0 1 1 0 0 0 1 1 1 1 0|0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 0 1 0]
      [0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 0 1 0|1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 1 1 0 0]
      [0 1 0 0 0 0 0 0 1 0 1 0 1 1 1 1 0 0 0 1 1 0 0|0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 1 0]
      [0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 0 1 0|0 1 0 0 0 0 0 0 1 1 1 0 1 1 1 0 1 1 1 0 1 1 0]
      [0 0 1 0 0 0 0 0 1 0 1 0 1 0 1 1 1 0 0 0 1 1 0|0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 1 0]
      [0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1 1 1 0|0 0 1 0 0 0 0 0 1 0 0 0 1 0 1 1 0 1 1 1 0 0 0]
      [0 0 0 1 0 0 0 0 0 1 0 1 0 1 1 1 1 1 0 0 0 1 0|0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 1 1 1 0]
      [0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 1 1 1 0|0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 1 1 0 1 1 1 0 0]
      [0 0 0 0 1 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 1 1 1 1 0]
      [0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 1 1 1 1 0|0 0 0 0 1 0 0 0 1 1 0 1 1 1 1 0 1 1 0 1 1 1 0]
      [0 0 0 0 0 1 0 0 1 0 0 1 0 1 0 0 1 1 1 1 0 1 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 1 0]
      [0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 1 0|0 0 0 0 0 1 0 0 1 0 0 1 0 0 1 1 0 1 1 0 1 0 0]
      [0 0 0 0 0 0 1 0 1 0 1 1 0 1 0 0 0 1 1 1 1 0 0|0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 0 0]
      [0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 1 0 0|0 0 0 0 0 0 1 0 0 1 0 0 1 0 1 1 1 0 1 1 0 0 0]
      [0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
      [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0]
      [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]

last modified: 2024-05-23

Notes

• All codes establishing the lower bounds where constructed using MAGMA.
• Most upper bounds on qubit codes for n≤100 are based on a MAGMA program by Eric Rains.
• For n>100, the upper bounds on qubit codes are weak (and not necessarily monotone in k).
• Some additional information can be found in the book by Nebe, Rains, and Sloane.
• My apologies to all authors that have contributed codes to this table for not giving specific credits.