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EP/J015067/1 - Molecular quantum devices

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Professor GAD Briggs EP/J015067/1 - Molecular quantum devices

Principal Investigator - Materials, University of Oxford

Other Investigators

Professor HL Anderson, Co InvestigatorProfessor HL Anderson

Dr A Ardavan, Co InvestigatorDr A Ardavan

Dr SC Benjamin, Co InvestigatorDr SC Benjamin

Dr F Giustino, Co InvestigatorDr F Giustino

Dr JJL Morton, Co InvestigatorDr JJL Morton

Dr JH Warner, Co InvestigatorDr JH Warner


Platform Grants

Research Areas

Quantum Optics and Information Quantum Optics and Information


Quantum Technology Research Ltd Quantum Technology Research Ltd

Peking University Peking University

Oxford Instruments plc Oxford Instruments plc

Hitachi Europe Ltd Hitachi Europe Ltd

Start Date


End Date




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Grant Description

Summary and Description of the grant

Whenever a fundamental new principle of science is discovered, the chances are that sooner or later a way will be found to use it for a new technology. The quantum mechanical principles of superposition and entanglement, identified back in the 1930s, are now understood to offer spectacular potential for technological applications. Superposition describes how an object can be in two states at once, as it were 'here' and 'there' at the same time. Two or more objects in superposition states can be entangled, so that measurements on each of them are correlated in a way that goes beyond anything we would expect from everyday intuition. Exploiting these effects in practical devices would provide new capabilities for fields such as molecular light harvesting and for molecular quantum technologies such as sensors, simulators, and quantum computers.

Successful laboratory experiments have shown that molecules of various kinds can exhibit these crucial quantum properties. Molecules are composed of electrons and atomic cores or 'nuclei'. Both electrons and nuclei can have a property called spin associated with them that makes them behave like tiny bar magnets. We have confirmed that electron and nuclear spins can be put into superpositions or entangled, and they can last for a long time in that condition. Most of the experiments so far have been in small test tubes. The crucial step now is to implement the same effects in nanometre scale electrical devices, such as single electron transistors consisting of single sheets of carbon rolled up as nanotubes or flat as sheets of graphene. By making hybrid technologies that combine molecules with nanoelectronics, we will lay the foundation for scaling up to more complex systems.

At this very small size, different atoms or molecules in different places affect the behaviour of the device. A breakthrough in the past few years enables us to see the positions of individual atoms in the materials which we want to use in our devices. The technique is aberration-corrected electron microscopy, and provided the electrons are not too energetic it is possible to look at the structures which we have made without damaging them. In this way we shall be able to relate the device performance to the atomic resolution microscopy of the component materials.

To take this quantum nanotechnology from engineering to application is extremely challenging, and lies at the limit of what is realistically feasible. It needs a team with a remarkable combination of expertise, who know how to collaborate across scientific fields. We must:
1. design the devices which we shall build, based on a deep understanding of how to control their quantum states;
2. produce the materials which we need, such as molecules with suitable spin states with carbon nanotubes and graphene for electrical substrates;
3. make nanoscale devices and examine them in a microscope to see where the individual atoms and molecules are;
4. perform the experiments to develop the quantum control and measurement for the effects which we aim to exploit;
5. undertake theoretical modelling to understand the electron behaviour and to design new materials systems for improved performance.

We are fortunate in having the right people and facilities to do this. The platform grant will sustain a team which brings together all the relevant skills. Together we shall make progress towards the emerging quantum technologies that will implement the deep resources of quantum mechanics in working solid state devices.

Structured Data / Microdata

Grant Event Details:
Name: Molecular quantum devices - EP/J015067/1
Start Date: 2013-01-30T00:00:00+00:00
End Date: 2018-01-29T00:00:00+00:00

Organization: University of Oxford

Description: Whenever a fundamental new principle of science is discovered, the chances are that sooner or later a way will be found to use it for a new technology. The quantum mechanical principles of superposition and entanglement, identified back in the 1930s, are n ...