Single quantum querying of a database

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 58, Issue 3, 1998, Pages 1822-1826

  Terhal, Barbara M ^a   Smolin, John A ^b  

^a UNIVERSITY OF AMSTERDAM   (Netherlands)

^b IBM T J WATSON RESEARCH CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001064668     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.58.1822     Document Type: Article

References (16)

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6. One could have a nonunitary quantum database where the (Formula presented) register is always reset to (Formula presented) to ensure it gives no information on (Formula presented). This would not matter to a classical query where all the information is in (Formula presented), but severely cripples the quantum algorithm. It is not known if such a database will allow any improvement over classical algorithms.
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