Prof Brendon Lovett
Professor
Research areas
Brendon Lovett is Professor in the School of Physics and Astronomy at the University of St Andrews.
Prof Lovett is a theoretical physicist whose aim is to understand the quantum properties of nanomaterials. His work has applications ranging from quantum information processing to solar energy harvesting.
Quantum systems have unique properties that distinguish them from the world of everyday experience. These are now being revealed to us through the remarkable achievement of measuring individual quantum particles. This incredible progress has led to an explosion of ideas for new quantum-based technologies, such as computers, sensors and encryption systems. However, the very properties that make quantum systems so potentially useful also cause them to be very fragile: Quantum particles necessarily interact with the vast quantum system of the environment, over which we have no control. I develop theories that allow us to understand such 'open quantum systems', and how we can preserve and control their quantum properties. Predicting the dynamics of an open quantum system is very challenging: traditional methods require resources scaling exponentially with the system size, making accurate calculation difficult, or impossible. To solve this problem, I lead a team that develops techniques that can make very accurate predictions efficiently: our new algorithms, which are based on tensor networks, are orders-of-magnitude more powerful than their predecessors.
To enable the testing, refinement and exploitation of my ideas, I work with leading experimentalists. In this way, we can develop the fundamental knowledge that will drive the technology of the future.
PhD supervision
- Thibaut Lacroix
- Piper Fowler-Wright
- Muhammad Zia
- Roosmarijn De Wit
Selected publications
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Open access
Analytic expression for the optical exciton transition rates in the polaron frame
Rouse, D. M., Gauger, E. M. & Lovett, B. W., 7 Jan 2022, In: Physical Review B. 105, 1, 11 p., 014302.Research output: Contribution to journal › Article › peer-review
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Open access
Efficient many-body non-Markovian dynamics of organic polaritons
Fowler-Wright, P., Lovett, B. W. & Keeling, J., 21 Oct 2022, In: Physical Review Letters. 129, 17, 7 p., 173001.Research output: Contribution to journal › Article › peer-review
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Open access
Exact dynamics of nonadditive environments in non-Markovian open quantum systems
Gribben, D., Rouse, D. M., Iles-Smith, J., Strathearn, A., Maguire, H., Kirton, P., Nazir, A., Gauger, E. M. & Lovett, B. W., Feb 2022, In: PRX Quantum. 3, 1, 18 p., 010321.Research output: Contribution to journal › Article › peer-review
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Open access
Simulation of open quantum systems by automated compression of arbitrary environments
Cygorek, M., Cosacchi, M., Vagov, A., Axt, V. M., Lovett, B. W., Keeling, J. & Gauger, E. M., Jun 2022, In: Nature Physics. 18, 6, p. 662-668 9 p.Research output: Contribution to journal › Article › peer-review
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Open access
Superabsorption in an organic microcavity: towards a quantum battery
Quach, J. Q., McGhee, K. E., Ganzer, L., Rouse, D. M., Lovett, B. W., Gauger, E. M., Keeling, J., Cerullo, G., Lidzey, D. G. & Virgili, T., 14 Jan 2022, In: Science Advances. 8, 2, 7 p., abk3160.Research output: Contribution to journal › Article › peer-review
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Open access
Using the environment to understand non-Markovian open quantum systems
Gribben, D., Strathearn, A., Fux, G. E., Kirton, P. & Lovett, B. W., 2022, In: Quantum. 6, 23 p., 847.Research output: Contribution to journal › Article › peer-review
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Open access
Avoiding gauge ambiguities in cavity quantum electrodynamics
Rouse, D. M., Lovett, B. W., Gauger, E. M. & Westerberg, N., 19 Feb 2021, In: Scientific Reports. 11, 10 p., 4281.Research output: Contribution to journal › Article › peer-review
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Open access
Efficient exploration of Hamiltonian parameter space for optimal control of non-Markovian open quantum systems
Fux, G. E., Butler, E., Eastham, P. R., Lovett, B. W. & Keeling, J., 17 May 2021, In: Physical Review Letters. 126, 20, 6 p., 200401.Research output: Contribution to journal › Article › peer-review
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Open access
Environmentally improved coherent light harvesting
Tomasi, S., Rouse, D. M., Gauger, E. M., Lovett, B. W. & Kassal, I., 8 Jul 2021, In: Journal of Physical Chemistry Letters. 12, p. 6143-6151 9 p.Research output: Contribution to journal › Article › peer-review
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Open access
Localisation determines the optimal noise rate for quantum transport
Coates, A. R., Lovett, B. W. & Gauger, E. M., 8 Dec 2021, In: New Journal of Physics. 23, 12, 14 p., 123014.Research output: Contribution to journal › Article › peer-review