Symmetry restoring and ancilla-driven entanglement for ultra-cold spin-1 atoms in a three-site ring
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DOI: 10.1007/s11128-016-1465-y
Abstract: The spin-change dynamics of a model with ultra-cold hyperfine-spin-1 atoms confined in an optical superlattice is discussed. First, the disturbance of the two-site dynamics by coupling the dimer to a spin-1 ancilla is analyzed. When… read more here.
Keywords: three site; site; spin; ultra cold ... See more keywords
Quantum algorithm for spectral projection by measuring an ancilla iteratively
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DOI: 10.1103/physreva.101.032339
Abstract: We propose a quantum algorithm for projecting to eigenstates of any hermitian operator, provided one can access the associated control-unitary evolution and measurement of the ancilla of the control. The procedure is iterative and the… read more here.
Keywords: projection measuring; quantum algorithm; spectral projection; algorithm spectral ... See more keywords
Harrow-Hassidim-Lloyd algorithm without ancilla postselection
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DOI: 10.1103/physreva.107.042408
Abstract: Harrow-Hassidim-Lloyd algorithm (HHL) allows for the exponentially faster solution of a system of linear equations. However, this algorithm requires the postselection of an ancilla qubit to obtain the solution. This postselection makes the algorithm result… read more here.
Keywords: harrow hassidim; lloyd algorithm; ancilla; postselection ... See more keywords