Dr David Mulryne

Profile

I am a Royal Society University Research Fellow and Proleptic Reader in Theoretical Cosmology. I am the Senior Tutor for Physics and Astronomy, and the Astronomy Unit outreach coordinator. 

After receiving an MSci from Cambridge (2003) and a PhD from the Astronomy Unit at Queen Mary (2006), I held postdoctoral positions at DAMTP Cambridge, the Theory Group Imperial, and back at Queen Mary, before being awarded a Royal Society University Research Fellowship and Proleptic Lectureship here in 2014. 

My area of research is focused on theoretical aspects of cosmology and related areas. More information can be found on the research and publication tabs. I also have extensive experience of teaching, outreach, and public engagement work.  

External to Queen Mary, I have been a member of various national grant panels and am currently a member of the STFC Astronomy Grants Panel. 

Teaching

Teaching at QMUL

Currently I teach SPA7010 The Galaxy . 

I also supervise BSc, MSci, and astrophysics MSc students for their research projects, and I regularly work with and supervise PhD students. 

Research

Research Interests:

I work in the area of theoretical cosmology and gravity.

Within cosmology, I’m interested in all aspects of the structure and evolution of the universe, from its earliest moments to its behaviour today, and in observations which inform us about the universe. Predominantly, however, I have worked on the very early universe, and in particular a phase of accelerated expansion known as inflation. Inflation is thought to be the origin of all structure in the universe, and so is a hugely important period in its history. Inflation and the phases which follow it can also give rise to gravitational waves and primordial black holes. I am interested in what we can learn about inflation and fundamental physics from these observable signatures.

Recently I have also developed an interest in modified gravity and black holes in modified theories.

Information about a code for inflationary cosmology, PyTransport, that I have developed can be found at transportmethod.com.

Examples of research funding:

Royal Society University Research Fellowship (together with renewal and enhancement awards), 2014-2024.

Astronomy Unit STFC Consolidated Grant 2023-2026 (co-I).

Astronomy Unit STFC Consolidated Grant 2014-2017 (named researcher).

Publications

A full list of my publications can be found here.

• Davies MW, Iacconi L, Mulryne DJ (2024). Numerical 1-loop correction from a potential yielding ultra-slow-roll dynamics. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2024/04/050

  
  

  QMRO: qmroHref
• Iacconi L, Mulryne DJ (2023). Multi-field inflation with large scalar fluctuations: non-Gaussianity and perturbativity. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2023/09/033

  
  

  QMRO: https://qmro.qmul.ac.uk/xmlui/handle/123456789/91381
• Fernandes PGS, Mulryne DJ (2023). A new approach and code for spinning black holes in modified gravity. nameOfConference

  
  

  DOI: 10.1088/1361-6382/ace232

  
  

  QMRO: https://qmro.qmul.ac.uk/xmlui/handle/123456789/91382
• Fernandes PGS, Mulryne DJ, Delgado JFM (2022). Exploring the small mass limit of stationary black holes in theories with Gauss–Bonnet terms. nameOfConference

  
  

  DOI: 10.1088/1361-6382/aca010

  
  

  QMRO: https://qmro.qmul.ac.uk/xmlui/handle/123456789/83206
• Davies MW, Carrilho P, Mulryne DJ (2022). Non-Gaussianity in inflationary scenarios for primordial black holes. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2022/06/019

  
  

  QMRO: https://qmro.qmul.ac.uk/xmlui/handle/123456789/80861
• Fernandes PGS, Carrilho P, Clifton T et al. (2022). The 4D Einstein–Gauss–Bonnet theory of gravity: a review. nameOfConference

  
  

  DOI: 10.1088/1361-6382/ac500a

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/77580
• Fernandes PGS, Carrilho P, Clifton T et al. (2021). Black Holes in the Scalar-Tensor Formulation of 4D Einstein-Gauss-Bonnet Gravity: Uniqueness of Solutions, and a New Candidate for Dark Matter. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.104.044029

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/73862
• Carrilho P, Mulryne D, Ronayne J (2021). Non-Gaussianity after many-field reheating. nameOfConference

  
  

  DOI: 10.1103/physrevd.103.083532

  
  

  QMRO: https://qmro.qmul.ac.uk/xmlui/handle/123456789/73085
• Clifton T, Carrilho P, Fernandes PGS et al. (2020). Observational constraints on the regularized 4D Einstein-Gauss-Bonnet theory of gravity. nameOfConference

  
  

  DOI: 10.1103/physrevd.102.084005

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/67659
• Fernandes PGS, Carrilho P, Clifton T et al. (2020). Derivation of Regularized Field Equations for the Einstein-Gauss-Bonnet Theory in Four Dimensions. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.102.024025

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/65708
• Carrilho P, Malik KA, Mulryne DJ (2019). Dissecting the growth of the power spectrum for primordial black holes. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.100.103529

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/61798
• Imrith SV, Mulryne DJ, Rajantie A (2019). The primordial curvature perturbation from lattice simulations. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.100.043543

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/59637
• Imrith SV, Mulryne DJ, Rajantie A (2018). Non-perturbative $δN$. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.98.043513

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/44165
• Carrilho P, MULRYNE DJ, RONAYNE J et al. (2018). Attractor Behaviour in Multifield Inflation. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2018/06/032

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/41843
• Ronayne JW, Mulryne DJ (2018). Numerically evaluating the bispectrum in curved field-space - with PyTransport 2.0. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2018/01/023

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/25893
• Leithes A, Malik KA, Mulryne DJ et al. (2017). Linear density perturbations in multifield coupled quintessence. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.95.123519

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/15789
• Dias M, Frazer J, Mulryne DJ et al. (2016). Numerical evaluation of the bispectrum in multiple field inflation—the transport approach with code. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2016/12/033

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/15887
• Kumar KS, Mulryne DJ, Nunes NJ et al. (2016). Non-Gaussianity in multiple three-form field inflation. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.94.103504

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/14807
• Kenton Z, Mulryne DJ (2016). The Separate Universe Approach to Soft Limits. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2016/10/035

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/18203
• Mulryne DJ, Ronayne JW (2016). PyTransport: A Python package for the calculation of inflationary correlation functions. nameOfConference

  
  

  DOI: 10.21105/joss.00494

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/15890
• Kenton Z, Mulryne DJ (2015). The squeezed limit of the bispectrum in multi-field inflation. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2015/10/018

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/17613
• Kenton Z, Mulryne DJ, Thomas S (2015). Generating the cosmic microwave background power asymmetry with. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.92.023505

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/12621
• Enqvist K, Mulryne DJ, Nurmi S (2015). Resolving primordial physics through correlated signatures. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2015/05/010

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/10171
• Dias M, Elliston J, Frazer J et al. (2014). The curvature perturbation at second order. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2015/02/040

  
  

  QMRO: qmroHref
• Elliston J, Orani S, Mulryne DJ (2014). General analytic predictions of two-field inflation and perturbative reheating. nameOfConference

  
  

  DOI: 10.1103/physrevd.89.103532

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/18853
• Ellis J, Mavromatos NE, Mulryne DJ (2014). Exploring Two-Field Inflation in the Wess-Zumino Model. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2014/05/012

  
  

  QMRO: qmroHref
• Elliston J, Mulryne DJ, Tavakol R (2013). What Planck does not tell us about inflation. nameOfConference

  
  

  DOI: 10.1103/physrevd.88.063533

  
  

  QMRO: qmroHref
• Mulryne DJ (2013). Transport techniques for non-Gaussianity. nameOfConference

  
  

  DOI: 10.1142/9789814623995_0209

  
  

  QMRO: qmroHref
• Mulryne DJ (2013). Transporting non-Gaussianity from sub to super-horizon scales. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2013/09/010

  
  

  QMRO: qmroHref
• Mulryne DJ, Noller J, Nunes NJ (2012). Three-form inflation and non-Gaussianity. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2012/12/016

  
  

  QMRO: qmroHref
• MULRYNE DJ, TAVAKOL R (2008). SOME COSMOLOGICAL CONSEQUENCES OF LOOP QUANTUM GRAVITY. The Eleventh Marcel Grossmann Meeting

  
  

  DOI: 10.1142/9789812834300_0286

  
  

  QMRO: qmroHref
• Anderson GJ, Mulryne DJ, Seery D (2012). Transport equations for the inflationary trispectrum. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2012/10/019

  
  

  QMRO: qmroHref
• ELLISTON J, MULRYNE D, SEERY D et al. (2011). EVOLUTION OF NON-GAUSSIANITY IN MULTI-SCALAR FIELD MODELS. nameOfConference

  
  

  DOI: 10.1142/s2010194511001292

  
  

  QMRO: qmroHref
• Elliston J, Alabidi L, Huston I et al. (2012). Large trispectrum in two-field slow-roll inflation. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2012/09/001

  
  

  QMRO: qmroHref
• Seery D, Mulryne DJ, Frazer J et al. (2012). Inflationary perturbation theory is geometrical optics in phase space. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2012/09/010

  
  

  QMRO: qmroHref
• Mulryne DJ, Ward J (2011). Towards an observational appraisal of string cosmology. nameOfConference

  
  

  DOI: 10.1088/0264-9381/28/20/204010

  
  

  QMRO: qmroHref
• Mulryne D, Orani S, Rajantie A (2011). Non-Gaussianity from the hybrid potential. nameOfConference

  
  

  DOI: 10.1103/physrevd.84.123527

  
  

  QMRO: qmroHref
• Elliston J, Mulryne D, Seery D et al. (2011). Evolution of non-Gaussianity in multi-scalar field models. nameOfConference

  
  

  DOI: 10.1142/S0217751X11054280

  
  

  QMRO: qmroHref
• Elliston J, Mulryne DJ, Seery D et al. (2011). Evolution of fNL to the adiabatic limit. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2011/11/005

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/65710
• Elliston J, Mulryne DJ, Seery D et al. (2011). Evolution of f_NL to the adiabatic limit. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2011/11/005

  
  

  QMRO: qmroHref
• Mulryne DJ, Seery D, Wesley D (2010). Moment transport equations for the primordial curvature perturbation. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2011/04/030

  
  

  QMRO: qmroHref
• Bojowald M, Mulryne D, Nelson W et al. (2010). The high-density regime of kinetic-dominated loop quantum cosmology. nameOfConference

  
  

  DOI: 10.1103/physrevd.82.124055

  
  

  QMRO: qmroHref
• Mulryne D, Seery D, Wesley D (2009). Non-Gaussianity constrains hybrid inflation. nameOfConference

  
  

  DOI: doi

  
  

  QMRO: https://uat2-qmro.qmul.ac.uk/xmlui/handle/123456789/65711
• Mulryne DJ, Seery D, Wesley D (2009). Moment transport equations for non-Gaussianity. nameOfConference

  
  

  DOI: 10.1088/1475-7516/2010/01/024

  
  

  QMRO: qmroHref
• Barnaby N, Mulryne DJ, Nunes NJ et al. (2009). Dynamics and stability of light-like tachyon condensation. nameOfConference

  
  

  DOI: 10.1088/1126-6708/2009/03/018

  
  

  QMRO: qmroHref
• Copeland EJ, Mulryne DJ, Nunes NJ et al. (2009). Gravitational wave background from superinflation in loop quantum cosmology. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.79.023508

  
  

  QMRO: qmroHref
• Nunes NJ, Mulryne DJ (2009). Non-linear non-local Cosmology. nameOfConference

  
  

  DOI: 10.1063/1.3131521

  
  

  QMRO: qmroHref
• Mulryne DJ, Nunes NJ (2008). Diffusing nonlocal inflation: Solving the field equations as an initial value problem. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.78.063519

  
  

  QMRO: qmroHref
• Copeland EJ, Mulryne DJ, Nunes NJ et al. (2008). Superinflation in loop quantum cosmology. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.77.023510

  
  

  QMRO: qmroHref
• Mena FC, Mulryne DJ, Tavakol R (2007). Nonlinear vector perturbations in a contracting universe. nameOfConference

  
  

  DOI: 10.1088/0264-9381/24/10/015

  
  

  QMRO: qmroHref
• Mulryne DJ, Nunes NJ (2006). Constraints on a scale invariant power spectrum from superinflation in loop quantum cosmology. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.74.083507

  
  

  QMRO: qmroHref
• Lidsey JE, Mulryne DJ (2006). Graceful entrance to braneworld inflation. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.73.083508

  
  

  QMRO: qmroHref
• Tavakol R, LIDSEY JE, Mulryne DJ et al. (2005). An Emergent Universe from a Loop. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.71.123512

  
  

  QMRO: qmroHref
• Mulryne DJ, Nunes NJ, Tavakol R et al. (2005). Inflationary cosmology and oscillating universes in loop quantum cosmology. nameOfConference

  
  

  DOI: 10.1142/s0217751x05024614

  
  

  QMRO: qmroHref
• Tavakol R, LIDSEY JE, Mulryne D et al. (2004). Oscillatory universes in loop quantum cosmology and initial conditions for inflation. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.70.063521

  
  

  QMRO: qmroHref
• Tavakol R, LIDSEY JE, Mulryne DJ et al. (2004). Inflationary Cosmology and Quantization Ambiguities in Semi-Classical Loop Quantum Gravity. nameOfConference

  
  

  DOI: 10.1103/PhysRevD.70.043530

  
  

  QMRO: qmroHref

Supervision

I supervise PhD students in the area of early universe cosmology and related areas of theoretical physics.

Current students:  Mr Matthew Davies, Mr Ethan Milligan, Mr Andrea Costantini. 

Former students: Dr Zac Kenton (2018), Dr Shailee Imrith (2019), Dr John Ronayne (2019),  Dr Pedro Fernandes (2022)

PhD project summary for prospective students: Early universe physics.

Public Engagement

Outreach and engagement with society

I enjoy outreach work a lot and regularly lecture to visiting students at Queen Mary, and visit schools myself to give talks. I take part in various other outreach activities and am the astronomy unit outreach coordinator. If you are interested in me or another member of the Unit delivering an activity please get in touch. 

Talks I have available include various versions of an introduction to cosmology, and an introduction to cosmic inflation -- you can see one version delivered at the Royal Institution at this link; "How Big is the Universe?" aimed at  a younger audience; "Ping Ping Particle Physics” aimed at students studying GCSE or A-level physics, which includes a demonstration of a particle accelerator using a Van Der Graaf generator, a ping pong ball, and my saucepan lid. 

Recently I’ve led the purchase of a 5 metre Planetarium for teaching and outreach work. Much of the content we use is generously provided for free by the British Fulldome Institute.