[119163] in Cypherpunks
yaqc: yet another quantum computer
daemon@ATHENA.MIT.EDU (David Honig)
Mon Oct 18 16:22:42 1999
Message-Id: <3.0.5.32.19991018130424.007bad70@pop.sprynet.com>
Date: Mon, 18 Oct 1999 13:04:24 -0700
To: cypherpunks@algebra.com, cryptography@c2.net
From: David Honig <honig@sprynet.com>
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Reply-To: David Honig <honig@sprynet.com>
Science v. 284, 18 Jun 99 p1967-69
_Quantum computing with electrons floating on liquid helium._
Jist: thousands of qubits possible, wave function changes in
nsec, coheres for msec.
Machinery: very cold helium layer on top of patterned electrodes.
Electrons are stored on other (exposed) surface of the He, location trapped
by electrodes.
Voltages on electrodes alter resonances; Write with microwave pulses. Read
by reversing voltage on He layer, waiting, and amplifying electrons
released from some electrode sites. Whole thing in vacuum.
Well-established physics behind it.
PM Platzman, MI Dykman
Bell Labs/Lucent, Michigan State Physics & Astronomy
