EPSRC Reference: 
EP/J009377/1 
Title: 
Hybrid Rotaxanes as Scaleable Two QubitGates for Quantum Information Processing 
Principal Investigator: 
Winpenny, Professor RE 
Other Investigators: 

Researcher CoInvestigators: 

Project Partners: 

Department: 
Chemistry 
Organisation: 
University of Manchester, The 
Scheme: 
Standard Research 
Starts: 
01 January 2012 
Ends: 
31 December 2014 
Value (£): 
350,923

EPSRC Research Topic Classifications: 
Chemical Synthetic Methodology 
Quantum Optics & Information 

EPSRC Industrial Sector Classifications: 
No relevance to Underpinning Sectors 


Related Grants: 

Panel History: 
Panel Date  Panel Name  Outcome 
08 Sep 2011

EPSRC Physical Sciences Chemistry  September 2011

Announced


Summary on Grant Application Form 
Modern computers work by storing and processing information in "bits". Within a bit the information is stored either as a 0 or 1. The huge computing power we now possess has some limitations. For example, computers are very fast at multiplying numbers together  2 x 3 x 3 x 5 x 7 x 11 x 17 x 23 x 41 = 111094830. The reverse operation is slow on a modern computer, i.e. if you are given 111094830 a computer would find it difficult working out the factors multiplied together. This operation  factoring large numbers into primes  looks like a mathematical oddity, but is the basis of how information is encrypted in the modern world.
An alternative computer  based on quantum information processing (QIP)  would operate in a very different way, using the strange principles of quantum mechanics. The information would be stored in a "qubit". In contrast to a bit, a qubit stores information as 0, 1 and the superposition of all numbers between 0 and 1. As an analogy: if a bit is like a light switch  either on or off  a qubit is like a dimmer switch, but one which is set at all positions simultaneously. In most cases a quantum computer would have few advantages over a normal computer, however in some cases  and factorising large numbers into primes is one example  then a quantum computer can perform a calculation quickly that is impossibly slow classically.
Some examples have been reported where simple calculations have been performed, but no quantum computer has been reported that could carry out a complex computation. Our proposal is develop molecules that can act as qubits, link then together to form the fundamental units for a computer  a twoqubit gate  and then develop further chemistry that would allow us to prepare devices with these molecular qubits.

Key Findings 
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Summary 

Date Materialised 


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Project URL: 

Further Information: 

Organisation Website: 
http://www.man.ac.uk 