**E-mail:** wh260@mrao.cam.ac.uk

**Office:** KAVLI K01

**Office Tel:** (01223) 766660

More Info (Internal)

Research Themes:

Will Handley is a Theoretical Cosmologist, studying the very earliest moments of the universe, having recently completed his PhD under his supervisors Anthony Lasenby and Mike Hobson.

His main interest is in "Initial Conditions for Inflation", examining the effect that high energy physics has on the universe a split second after the Big Bang. In 2014, he proved that that the pre-inflationary universe takes an extremely generic form, independent of the type of particle which drives the early accelerated expansion of the universe.

In addition to theoretical investigation, he also examines the observational consequences of these new ideas; testing theories against the latest data from microwave telescopes using the University supercomputers.

Recently, his work has focussed on developing novel Bayesian algorithms for high-dimensional parameter estimation and model comparison using nested sampling. Possible applications currently under investigation include protein folding and compressed sensing, in addition to cosmological parameter estimation.

Will Handley is a member of the Planck Core HFI team 2.

First author papers

July 2016: Novel quantum initial conditions for inflation arXiv:1607.04148

June 2015: PolyChord: next-generation nested sampling MNRAS arXiv:1506.00171

Feb 2015: PolyChord: nested sampling for cosmology: MNRAS arXiv:1502.01856

Jan 2014: Kinetic Initial Conditions for Inflation: PRD arXiv:1401.2253

Collaborative papers

June 2016: Constraining the dark energy equation of state using Baye's theorem and the Kullback-Liebler divergence arXiv:1607.00270

April 2016: AMI observations of ten CLASH galaxy clusters: SZ and X-ray data used together to determine cluster dynamical states MNRAS arXiv:1604.06120

June 2015: Bayesian Model selection without evidences: application to the dark energy equation of state MNRAS arXiv:1506.09024

Feb 2015: Planck 2015 results: I overview of products and scientific results: arXiv:1502.01582

Feb 2015: Planck 2015 results: XX Constraints on Inflation: arXiv:1502.02114

2016 July-Present: Post-doctoral position at UCL

2012-2016: PhD in Physics* (University of Cambridge)*

2008-2012: MSci in Experimental and Theoretical Physics* (University of Cambridge)*

- December 2013: Best Presentation
*(Cavendish Graduate Students Conference)* - 2011-2012: Best Theoretical final year project
*(University of Cambridge)*

- PolyChord 2.0 & the future of nested sampling, University of Sussex, UK. (May 2016)
- PolyChord & the future of nested sampling, Edinburgh, UK. (Mar 2016)
- PolyChord: next generation nested sampling, Max Planck Institute, Germany. (Dec 2015)
- PolyChord: next generation nested sampling, University of Sussex, UK. (Feb 2015)
- Kinetic dominance in the pre-inflationary universe, Cavendish grad. conference (Dec 2013)

- Supervisions: Part IA Mathematics for Natural Sciences
*(Michaelmas 2012-present)* - Supervisions: Part IA Physics for Natural Sciences
*(Michaelmas 2015 - Easter 2016)* - Supervisions: Part II General Relativity
*(Michaelmas 2013-present)* - Demonstrating: Part II Theoretical Physics 1
*(Michaelmas 2012)* - Demonstrating: Part II Theoretical Physics 2
*(Lent 2013)* - Tripos Examples Classes: Part IA Mathematics for Natural Sciences
*(Easter 2014 -Present)*

- "Introduction to Astronomy: Beyond the Milky Way": Institute of Astronomy Public Talk, University of Cambridge (27th May 2015)
- "To infinity and beyond: Dark Energy": Pint of Science Talk, Cambridge Brewhouse (20th May 2015)
- "The Cosmic Microwave Background: Our probe of the birth of the universe": Institute of Astronomy Public Talk, University of Cambridge (13th January 2015)
- "Dark Energy and Dark Matter: The composition and Fate of the universe": Letchworth Astronomical Society (7:45pm 26th November 2014)
- "Introduction to Astronomy: Beyond the Milky Way": Institute of Astronomy Public Talk, University of Cambridge (28th May 2014)
- "Inflation: Extreme expansion in the earliest universe": Institute of Astronomy Public Talk, University of Cambridge (19th March 2014)
- "The Physics of Juggling": CCPE, Cavendish Laboratory (7 times 10th-14th February 2014, 17th-18th March 2014)
- "The first 3 yocto-pico seconds": Three minute wonder, Cavendish Laboratory (31st January 2014)
- "Special Relativity: An intutitive viewpoint": Hill's Road VIth form college (18th December 2013)
- "Dark matter and dark energy: common misconceptions": Institute of Astronomy Public Talk, University of Cambridge (2nd October 2013)
- "Astrophysics: The universe in 15 minutes": Physics at Work, Cavendish Laboratory (25th September 2013)
- "Introduction to Cosmology": Hill's Road VIth form college (8th July 2013)
- "Introduction to Astronomy: Beyond the Milky Way": Institute of Astronomy Public Talk, University of Cambridge (29th May 2013)
- "Institute of Astronomy Open Day": (23rd March 2013)
- "Cosmology: The search for Dark Matter and Dark Energy": Luton Astronomical Society, (20th March 2013)
- "Frontiers of Physics: Cosmology": Alleyn's School (26th September 2012)