David P. DiVincenzo (born 1959) is an American theoretical physicist. He is the director of the Institute of Theoretical Nanoelectronics at the Peter Grünberg Institute at the
Forschungszentrum Jülich
Forschungszentrum Jülich (FZJ; “Jülich Research Centre”) is a German national research institution that pursues interdisciplinary research in the fields of energy, information, and bioeconomy. It operates a broad range of research infrast ...
and professor at the Institute for Quantum Information at
RWTH Aachen University
RWTH Aachen University (), in German ''Rheinisch-Westfälische Technische Hochschule Aachen'', is a German public research university located in Aachen, North Rhine-Westphalia, Germany. With more than 47,000 students enrolled in 144 study prog ...
. With
Daniel Loss (at the
University of Basel
The University of Basel (Latin: ''Universitas Basiliensis''; German: ''Universität Basel'') is a public research university in Basel, Switzerland. Founded on 4 April 1460, it is Switzerland's oldest university and among the world's oldest univ ...
), he proposed the
Loss–DiVincenzo quantum computer
The spin qubit quantum computer is a quantum computer based on controlling the spin of charge carriers (electrons and electron holes) in semiconductor devices. The first spin qubit quantum computer was first proposed by Daniel Loss and David P. D ...
in 1997, which would use electron spins in
quantum dots
Quantum dots (QDs) or semiconductor nanocrystals are semiconductor particles a few nanometres in size with optical and electronic properties that differ from those of larger particles via quantum mechanical effects. They are a central topic i ...
as
qubits
In quantum computing, a qubit () or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical system, ...
.
Career
In 1996, during his research at
IBM
International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...
, he published a paper "Topics in Quantum Computing" which outlined the five minimal requirements he predicted were necessary for creating a quantum computer. It has since become known as the "
DiVincenzo criteria" and has influenced much of the experimental research into developing a working quantum computer.
The DiVincenzo criteria that a quantum computer implementation must satisfy are as follows:
# A scalable physical system with well-characterized
qubit
In quantum computing, a qubit () or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical syste ...
s,
# The ability to initialize the state of the qubits to a simple fiducial state, such as to
,
# A "universal" set of
quantum gate
In quantum computing and specifically the quantum circuit model of computation, a quantum logic gate (or simply quantum gate) is a basic quantum circuit operating on a small number of qubits. Quantum logic gates are the building blocks of quantu ...
s,
# Long relevant
decoherence
Quantum decoherence is the loss of quantum coherence. It involves generally a loss of information of a system to its environment. Quantum decoherence has been studied to understand how quantum systems convert to systems that can be expla ...
times, much longer than the gate-operation time,
# A qubit-specific measurement capability.
For
quantum communication
In quantum information theory, a quantum channel is a communication channel that can transmit quantum information, as well as classical information. An example of quantum information is the general dynamics of a qubit. An example of classical in ...
, the act of transmitting intact qubits from place to place, two additional criteria must be satisfied:
6. The ability to interconvert stationary and flying qubits, and
7. The ability to transmit flying qubits between distant locations.
See also
*
DiVincenzo's criteria
The DiVincenzo criteria are conditions necessary for constructing a quantum computer, conditions proposed in 1996 by the theoretical physicist David P. DiVincenzo, as being those necessary to construct such a computer—a computer first proposed ...
*
Quantum computing
A quantum computer is a computer that exploits quantum mechanical phenomena. On small scales, physical matter exhibits properties of wave-particle duality, both particles and waves, and quantum computing takes advantage of this behavior using s ...
References
External links
CV on RWCC Aachen University staff page
{{DEFAULTSORT:DiVincenzo, David
Living people
21st-century American physicists
1959 births
Scientists from Philadelphia
American people of Italian descent
American quantum information scientists
Fellows of the American Physical Society