genSwap()

Tensor< 4 > syten::genSwap	(	Basis const &	firstBasis,
		Basis const &	secondBasis
	)

Constructs a fermionic swap gate of two bases.

The resulting tensor has legs fB, sB, fB.flipped and sB.flipped and is the identity up to factors of ±1. Requires fermionic sectors in firstBasis and secondBasis to be marked properly and both bases to have the same direction.

 fB   sB
  |    |
[ 1    2 ]
[  swap  ]
[ 3    4 ]
  |    |
 fB.f sB.f

References syten::Basis::dir, syten::Basis::flipped(), genFuse(), genSplit(), Inc, minus_on_swap(), and SYTEN_ASSERT_MSG.

Referenced by syten::IPEPS::barTensor(), and syten::IPEPS::mult().

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