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
- Roosmarijn De Wit
- Muhammad Zia
Selected publications
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Open access
Few-emitter lasing in single ultra-small nanocavities
Ojambati, O. S., Arnardottir, K. B., Lovett, B. W., Keeling, J. & Baumberg, J. J., 19 Jan 2024, (E-pub ahead of print) In: Nanophotonics. 8 p.Research output: Contribution to journal › Article › peer-review
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Open access
From non-Markovian dissipation to spatiotemporal control of quantum nanodevices
Lacroix, T. F. M., Lovett, B. W. & Chin, A. W., 2024, In: Quantum. 8, 23 p., 1305.Research output: Contribution to journal › Article › peer-review
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Open access
Influence of strong molecular vibrations on decoherence of molecular polaritons
Rouse, D. M., Gauger, E. M. & Lovett, B. W., 15 Nov 2024, (E-pub ahead of print) In: ACS Photonics. Articles ASAP, 14 p.Research output: Contribution to journal › Article › peer-review
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Open access
Light-harvesting efficiency cannot depend on optical coherence in the absence of orientational order
Rouse, D. M., Kushwaha, A., Tomasi, S., Lovett, B. W., Gauger, E. M. & Kassal, I., 11 Jan 2024, In: The Journal of Physical Chemistry Letters. 15, 1, p. 254-261 8 p.Research output: Contribution to journal › Article › peer-review
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Open access
OQuPy: a Python package to efficiently simulate non-Markovian open quantum systems with process tensors
Fux, G. E., Fowler-Wright, P., Beckles, J., Butler, E. P., Eastham, P. R., Gribben, D., Keeling, J., Kilda, D., Kirton, P., Lawrence, E. D. C., Lovett, B. W., O'Neill, E., Strathearn, A. & de Wit, R., 28 Sept 2024, In: Journal of Chemical Physics. 161, 12, 19 p., 124108 .Research output: Contribution to journal › Article › peer-review
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Open access
Optimizing performance of quantum operations with non-Markovian decoherence: the tortoise or the hare?
Butler, E. P., Fux, G. E., Ortega-Taberner, C., Lovett, B. W., Keeling, J. & Eastham, P. R., 9 Feb 2024, In: Physical Review Letters. 132, 6, 7 p., 060401.Research output: Contribution to journal › Article › peer-review
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Open access
Sublinear scaling in non-Markovian open quantum systems simulations
Cygorek, M., Keeling, J., Lovett, B. W. & Gauger, E. M., Mar 2024, In: Physical Review X. 14, 1, 25 p., 011010.Research output: Contribution to journal › Article › peer-review
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Open access
Tree-like process tensor contraction for automated compression of environments
Cygorek, M., Lovett, B. W., Keeling, J. & Gauger, E. M., 25 Nov 2024, In: Physical Review Research. 6, 13 p., 043203.Research output: Contribution to journal › Article › peer-review
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Open access
Determining the validity of cumulant expansions for central spin models
Fowler-Wright, P., Arnardóttir, K. B., Kirton, P., Lovett, B. W. & Keeling, J., 1 Sept 2023, In: Physical Review Research. 5, 3, 9 p., 033148.Research output: Contribution to journal › Article › peer-review
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Open access
From Goldilocks to twin peaks: multiple optimal regimes for quantum transport in disordered networks
Coates, A. R., Lovett, B. W. & Gauger, E. M., 14 Apr 2023, In: Physical Chemistry Chemical Physics. 25, 14, p. 10103-10112 10 p.Research output: Contribution to journal › Article › peer-review