24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(12) PATENT APPLICATION PUBLICATION
(19)
INDIA (21) Application No: 135/MUMNP/2004 A
(22) Date of filing of Application : 20/02/2004
(54) Title of the invention:
(51) International Classification: G 06 F 1/00 (71)
(31) Priority Document No. : 1. 60/332,837
2. 60/414,964
(32) Priority Date :
(33) Name of priority country :
(86)
(43) Publication Date: 24/06/2005
TECHNIQUES FOR PERFORMING LOGIC OPERATIONS USING
QUANTUM STATES OF SINGLE PHOTONS.
1. 06/11/2001
2. 30/09/2002
U.S.A.
International Application : PCT/US02/35248
No. and Filing Date : 01/11/2002
(87) International :
Publication No. WO03/040899 A2
(61)
(62)
Patent of addition to
Application No. : NIL
Filed on N.A.
Divisional to
Application No. : NIL
Filed on : N.A.
(57) Abstract : A method and apparatus for performing logic
operations using quantum polarization states of single
photons, include a first polarizing beam splitter having first
input spatial modes and first output spatial modes for a first
set of orthogonal polarizations. A second polarizing beam
splitter has a second input spatial mode and second output
spatial modes for a second set of orthogonal polarizations.
The second set of orthogonal polarizations is different from
the first set. The second input spatial mode is aligned with a
first detected output spatial mode. A single photon detector of
multiple single photon detectors is disposed along each one of
the second output spatial modes. A first device output carries
an output photon based in part on a number of photons
detected by the single photon detectors. Such logic operations
may be used in quantum computers for quantum information
processing.
Total Pages: 57.
(72)
Name of the Applicant:
THE JOHNS HOPKINS UNIVERSITY
Address of the Applicant:
34 TH AND CHARLES STREETS,
BALTIMORE, MARYLAND 21218,
UNITED STATES OF AMERICA.
Name of the Inventors:
1. PITTMAN TODD B.
2. FRANSON JAMES D.
3. JACOBS BRYAN C.
Filed U/S 5(2) before the
Patents (Amendment)
Ordinance,2004 : NO
( Figure: 2A )
The Patent Office Journal 24.06.2005 17910