[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Quantum computers/Java of a different sort

To: [email protected]
Subject: Quantum computers/Java of a different sort
From: Mike McNally <[email protected]>
Date: Mon, 20 Jan 1997 13:03:54 -0600
Sender: [email protected]
For all you quantum computer fans, see 

	http://sciencenow.sciencemag.org/html/970117c.htm
-- 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
Mike McNally -- Egregiously Pointy -- Tivoli Systems, "IBM" -- Austin
mailto:[email protected]    mailto:[email protected]    http://www.io.com/~m101
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

--------------32AF54C4607C
Content-Type: MESSAGE/RFC822
Content-ID: <[email protected]>

Return-Path: <[email protected]>
Received: from tivoli.com by kenya.tivoli.com (8.8.4/jfy)
	id MAA02404; Mon, 20 Jan 1997 12:50:23 -0600 (CST)
Received: from corp.tivoli.com (corp.tivoli.com [146.84.1.6]) by tivoli.com (8.8.0/8.8.0-with-local-mods-ESMTP) with ESMTP id MAA08806; Mon, 20 Jan 1997 12:50:23 -0600 (CST)
Received: from tivoli.com (tivoli.tivoli.com [146.84.1.5]) by corp.tivoli.com (8.6.10/8.6.13) with ESMTP id MAA10846; Mon, 20 Jan 1997 12:49:18 -0600
Received: from notes-brahms2.tivoli.com (brahms2.tivoli.com [146.84.3.4]) by tivoli.com (8.8.0/8.8.0-with-local-mods-ESMTP) with SMTP id MAA08787; Mon, 20 Jan 1997 12:50:15 -0600 (CST)
Received: by notes-brahms2.tivoli.com(Lotus SMTP MTA v1.05 (274.9 11-27-1996))  id 86256425.00673DAD ; Mon, 20 Jan 1997 12:47:39 -0500
From: [email protected]
X-Lotus-FromDomain: TIVOLI SYSTEMS
To: [email protected]
Message-ID: <[email protected]>
Date: Mon, 20 Jan 1997 12:49:39 -0500
Subject: ScienceNOW www.sciencenow.org
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII







[email protected]
01/20/97 12:49 PM





An advance in Java computing...

http://sciencenow.sciencemag.org/html/970117c.htm



<BASE HREF="http://sciencenow.sciencemag.org/html/970117c.htm">

<HTML>
<HEAD>
<TITLE>ScienceNOW   www.sciencenow.org</TITLE>
<META NAME="ScienceNOW   www.sciencenow.org">
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK="#004080" VLINK="#649FDB" TEXT="#000000">
<TABLE Border=0 Width=100%>
<TR VALIGN="top" ALIGN="center">
<TD>
<A
HREF="/cgi/redirect-ad.cgi?journal=sciencenow&ad=Knight%20Ridder%20ScienceB
ase%20-%20Fish&url=http://krscience.dialog.com/&side=only"><IMG BORDER=2
WIDTH=220 HEIGHT=40
SRC="/ads/gifs/845499541.CDATAKRFISH.GIF"ALT="Knight-Ridder
ScienceBase"></A></TD>
<TD>
<A
HREF="/cgi/redirect-ad.cgi?journal=sciencenow&ad=Hewlett-Packard&url=http:/
/www.hp.com/info/hpcag8&side=only"><IMG BORDER=2 WIDTH=220 HEIGHT=40
SRC="/ads/gifs/850239381.gif"ALT="Hewlett-Packard Chemical
Analysis"></A></TD>
</TABLE>
<P>
<TABLE Border=0 Cellspacing=0 Cellpadding=0>
 <TR VALIGN="top" ALIGN="center">
 <TD><A HREF="../home.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-home.gif"  BORDER=0  ALT="Home" ></A></TD>
 <TD><A HREF="./newstips.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-news.gif"  BORDER=0  ALT="News Tips" ></A></TD>
 <TD><A HREF="../archives.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-arch.gif"  BORDER=0  ALT="Archives" ></A></TD>
 <TD><A HREF="./masthead.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-mast.gif"  BORDER=0  ALT="Masthead" ></A></TD>
 <TD><A HREF="http://www.sciencemag.org/science/scripts/feedback.pl"><IMG
 HEIGHT=20 WIDTH=100 SRC="../assets/images/Nav-feed.gif"  BORDER=0
 ALT="Feedback" ></A></TD> <TD><A HREF="http://www.sciencemag.org/"><IMG
 HEIGHT=20 WIDTH=100 SRC="../assets/images/Nav-sci.gif"  BORDER=0
 ALT="Science Online" ></TD>
</TABLE>
<P>
<TABLE  Border=0 Cellspacing=0 Cellpadding=0>
<TR>
 <TD WIDTH=100><A HREF="./970117b.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Prevstor.gif"  BORDER=0  ALT="Previous Story"
 ></A></TD> <TD WIDTH=100><A HREF="./970117d.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nextstor.gif"  BORDER=0  ALT="Next Story"
 ></A></TD></TR>
</TABLE><P>
<TABLE Width=100%>
<TR>
<TD WIDTH=100 ALIGN="center"><P><A
HREF="/cgi/redirect-ad.cgi?journal=sciencenow&ad=SB:%20Science%20Online&url
=http://science-mag.aaas.org/science/&side=only"><IMG BORDER=2 WIDTH=75
HEIGHT=75 SRC="/ads/gifs/845576920.CDATAONLINE2.GIF"ALT="Science
Online"></A></TD> <TD WIDTH=100 ALIGN="center"><P><A
HREF="/cgi/redirect-ad.cgi?journal=sciencenow&ad=SB:%20Next%20Wave&url=http
://www.nextwave.org/&side=only"><IMG BORDER=2 WIDTH=75 HEIGHT=75
SRC="/ads/gifs/845560987.CDATANXTWV1.GIF"ALT="Science's Next
Wave"></A></TD> <TD ALIGN="right" VALIGN="Center"><IMG HEIGHT=49 WIDTH=273
SRC="../assets/images/Scinowsm.gif"  BORDER=0  ALT="ScienceNOW logo"
></TD></TR>
</TABLE>
<P ALIGN="RIGHT"><FONT SIZE="-1">
Friday, 17 January 1997, 7:00 p.m.
</FONT></P><P ALIGN="Center"><FONT SIZE="+1"><STRONG>
Quantum Computer in a Cup of Joe?<p>
</STRONG></FONT></P>



<p>
Researchers have come up with a way to turn coffee and other mundane
liquids into primitive quantum computers. The findings, reported in today's
 <i>Science</i> and in an upcoming issue of the <i>Proceedings of the
National Academy of Sciences</i>, suggest a new approach toward conquering
the Mount Everest of computing: a quantum computer that in a few seconds
could perform calculations that would take billions of years on an ordinary
 supercomputer.<p>
<A NAME="image1"><!--null--></A><P><HR>
<IMG ALT="Illustration" BORDER=1 ALIGN=LEFT HSPACE=20 VSPACE=10
SRC="970117-2.gif">
<BR CLEAR=ALL>
<STRONG>Fresh-brewed. </STRONG>A prototype tabletop NMR quantum computer,
showing the circuitry and the radio-frequency coil.<P>
<FONT SIZE=-2>JOSHUA SMITH</FONT><BR>
<HR><P>The key is nuclear magnetic resonance (NMR), a technique for
manipulating and measuring the spins of atomic nuclei that is already a
mainstay of medical imaging and chemical analysis. The up-or-down spin of
nuclei offers the two-bit logic system that a computer needs. What makes a
quantum computer special, however, is quantum parallelism. In the strange
world of quantum mechanics, the spin of a nucleus can be in both states,
representing both bits, at the same time. That property should permit a
quantum computer to perform calculations on incredibly large numbers of
bits at once. And Neil Gershenfeld of the Massachusetts Institute of
Technology and Isaac Chuang of the University of California, Santa Barbara,
 and a second team, Tim Havel and Amr Fahmy of Harvard Medical School and
David Cory of MIT, have found that it's easier to achieve this parallelism
by using NMR in an ordinary liquid than in the exotic systems researchers
have tried so far.<p>
Cory, Fahmy, and Havel have actually built quantum circuits using a
standard NMR spectrometer, while Gershenfeld and Chuang are gearing up
experiments and hope to demonstrate quantum circuits and maybe even a
simple computation by next summer. What can be done now can be done with
easily available and affordable equipment--&quot;off-the-shelf coffee cups,
off-the
-shelf liquids, off-the-shelf magnets, etc.,&quot; says MIT computer
scientist Seth Lloyd.<p> &quot;This NMR scheme is pretty slick stuff, but
in the long run, they're going to have to find a particularly special
molecule or state that allows them to extend it to large numbers,&quot;
says Chris Monroe of the National Institute of Standards and Technology.<p>
Indeed, the researchers note that fundamental obstacles may prevent the
scheme from ever producing a practical computer. But &quot;from the point
of view of verifying the basic ideas and doing interesting physics,&quot;
says Lloyd, a pioneer theorist in quantum computing, &quot;it's
fantastic.&quot; For more details, <i>Science</i> Online subscribers can
link to the <a
href="http://www.sciencemag.org/cgi/content/full/275/5298/307">News
story</a> in today's <i>Science</i>.<p>
<p>



<P ALIGN="CENTER"><A
HREF="http://www.sciencemag.org/science/home/copyright.shtml"><FONT
SIZE="-1">&copy; 1997 by the American Association for the Advancement of
Science</FONT></A></P>
<TABLE  Border=0 Cellspacing=0 Cellpadding=0>
<TR>
 <TD WIDTH=100><A HREF="./970117b.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Prevstor.gif"  BORDER=0  ALT="Previous Story"
 ></A></TD> <TD WIDTH=100><A HREF="./970117d.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nextstor.gif"  BORDER=0  ALT="Next Story"
 ></A></TD></TR>
 </TABLE><P>
 <TABLE Border=0 Cellspacing=0 Cellpadding=0>
<TR VALIGN="top" ALIGN="center">
 <TD><A HREF="../home.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-home.gif"  BORDER=0  ALT="Home" ></A></TD>
 <TD><A HREF="./newstips.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-news.gif"  BORDER=0  ALT="News Tips" ></A></TD>
 <TD><A HREF="../archives.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-arch.gif"  BORDER=0  ALT="Archives" ></A></TD>
 <TD><A HREF="./masthead.htm"><IMG HEIGHT=20 WIDTH=100
 SRC="../assets/images/Nav-mast.gif"  BORDER=0  ALT="Masthead" ></A></TD>
 <TD><A HREF="http://www.sciencemag.org/science/scripts/feedback.pl"><IMG
 HEIGHT=20 WIDTH=100 SRC="../assets/images/Nav-feed.gif"  BORDER=0
 ALT="Feedback" ></A></TD> <TD><A HREF="http://www.sciencemag.org/"><IMG
 HEIGHT=20 WIDTH=100 SRC="../assets/images/Nav-sci.gif"  BORDER=0
 ALT="Science Online" ></TD>
</TABLE>
</BODY></HTML>




--------------32AF54C4607C--
Follow-Ups:
- Re: Quantum computers/Java of a different sort
  - From: Mike McNally <[email protected]>
Prev by Date: Re: microcurrency: Netscape vs. Microsoft
Next by Date: Re: a comment of Vulis's
Prev by thread: Quantum computers/Java of a different sort
Next by thread: Re: Quantum computers/Java of a different sort
Index(es):
- Date
- Thread