公开(公告)号：EP1805697A2

公开(公告)日：2007-07-11

申请号：EP05786324.3

申请日：2005-06-28

申请人： Hewlett-Packard Development Company, L.P.

发明人： MUNRO, William J., Hewlett-Packard Laboratories ,  SPILLER, Timothy P., Hewlett-Packard Laboratories ,  NEMOTO, Kae

IPC分类号： G06N1/00

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： Nonlinear elements (200) can efficiently implement quantum information processing systems such as controlled phase shifters (400), non-absorbing detectors including parity detectors (1290), quantum subspace projections (600), non-absorbing Bell state analyzers (800), non-absorbing encoders/entanglers (1200), and fundamental quantum gates such as CNOT gates (1300). The non-absorbing detectors (1640, 1650) permit improvements in the efficiency of a probabilistic quantum gate (1720) by permitting reuse of the same photonic resources during multiple passes through the probabilistic gate (1720).

公开(公告)号：EP1779305A2

公开(公告)日：2007-05-02

申请号：EP05764610.1

申请日：2005-07-13

申请人： Hewlett-Packard Development Company, L.P.

发明人： MUNRO, William J., Hewlett-Packard Laboratories ,  SPILLER, Timothy P., Hewlett-Packard Laboratories ,  BARRETT, Sean D., Hewlett-Packard Laboratories ,  KOK, Pieter, Hewlett-Packard Laboratories

IPC分类号： G06N1/00

CPC分类号： G06N99/002 ,  B82Y10/00

摘要： The states of matter systems (110) having only one basis state that couples to an excited state can be entangled using measurements of photons during transitions from the excited state. High fidelity of the entanglement can be achieved by repeating the measurements after performing bit flips on the matter systems (110). High efficiency of entanglement operation can be achieved using non-absorbing parity measurements on the emitted photons so that measured photons can be subsequently manipulated and measured to near-deterministically produce entangled states. Such entanglement operations can be employed to construct cluster states suitable for simulating arbitrary logic networks.