Sir Andrew Fielding Huxley {'1': ", '2': ", '3': ", '4': "} (22 November 191730 May 2012) was a Nobel Prize-winning English physiologist and biophysicist.
 He was born into the prominent Huxley family.
 After graduating from Westminster School in Central London, from where he won a scholarship to Trinity College, Cambridge, he joined Alan Lloyd Hodgkin to study nerve impulses.
 Their eventual discovery of the basis for propagation of nerve impulses (called an action potential) earned them the Nobel Prize in Physiology or Medicine in 1963.
 They made their discovery from the giant axon of the Atlantic squid.
 Soon after the outbreak of the Second World War, Huxley was recruited by the British Anti-Aircraft Command and later transferred to the Admiralty.
 After the war he resumed research at The University of Cambridge, where he developed interference microscopy that would be suitable for studying muscle fibres.
In physiology, an action potential occurs when the membrane potential of a specific axon location rapidly rises and falls: this depolarisation then causes adjacent locations to similarly depolarise.
 In the Hodgkin–Huxley (HH) model of Alan Lloyd Hodgkin and Andrew Fielding Huxley, speed of transmission of an action potential was undefined and it was assumed that adjacent areas became depolarised due to released ion interference with neighbouring channels.
 Measurements of ion diffusion and radii have since shown this to not be possible.
 Moreover, contradictory measurements of entropy changes and timing disputed the HH as acting alone.
 More recent work has shown that the HH action potential is not a single entity but is a coupled synchronised oscillating lipid pulse (action potential pulse) powered by entropy from the HH ion exchanges.
Andrew D. Huxley (born 1966) is a chair of the physics department of Edinburgh University.
 Of no relation to Sir Andrew F. Huxley (the English physiologist and biophysicist), Prof. Andrew D. Huxley is of renown in the field of condensed matter physics.
 While at the CEA laboratory in Grenoble, Huxley was involved in the revolutionary discovery of superconductivity in the ferromagnet UGe under applied pressure, in collaboration with a team at Cambridge University [2].
 This was followed up by a series of breakthroughs in another ferromagnetic material, URhGe [3-5], which was found to turn superconducting under the application of an external magnetic field.
 This emergence of an unconventional superconducting state by the application of an external tuning parameter such as magnetic field or pressure is hypothesised to be closely related to a 'Quantum critical point' (QCP) - a special phase transition that occurs at temperatures approaching zero kelvins.
 Quantum fluctuations are enhanced at the QCP, destabilising the conventional phase that dominates under ambient conditions, making conditions propitious for the emergence of a novel unconventional phase such as superconductivity, or possibly even more exotic states.
Alan Richard Lloyd is an English writer born in 1927.
 He is most famous for his Kine Saga fantasy books for teenagers.
 He has also written adult fiction and non-fiction, most notably on the history of the British monarchy.
 His adult work is published under the name "Alan Lloyd" whilst children's work is published under "A.R. Lloyd"
Sir John Carew Eccles (27 January 1903 – 2 May 1997) was an Australian neurophysiologist and philosopher who won the 1963 Nobel Prize in Physiology or Medicine for his work on the synapse.
 He shared the prize with Andrew Huxley and Alan Lloyd Hodgkin.
In membrane biology, the Hodgkin cycle is a key component of membrane physiology that describes bioelectrical impulses.
 It was identified by British physiologist and biophysicist Sir Alan Lloyd Hodgkin.
Sir Alan Lloyd Hodgkin (5 February 1914 – 20 December 1998) was an English physiologist and biophysicist, who shared the 1963 Nobel Prize in Physiology or Medicine with Andrew Huxley and John Eccles.
The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement.
 It was independently introduced in 1954 by two research teams, one consisting of Andrew F. Huxley and Rolf Niedergerke from the University of Cambridge, and the other consisting of Hugh Huxley and Jean Hanson from the Massachusetts Institute of Technology.
 It was originally conceived by Hugh Huxley in 1953.
 Andrew Huxley and Niedergerke introduced it as a "very attractive" hypothesis.
Marion "Marni" Hodgkin, Lady Hodgkin (28 November 1917 – 11 March 2015) was an American children's book editor.
 She was regarded as one of the notable and influential children's book editors of the 1960s.
 She was the daughter of Francis Peyton Rous and wife of Alan Lloyd Hodgkin, both Nobel Prize winners.
Rolf Nidergerke (30 April 1921 – 27 December 2011) was a German physiologist and physician, and one of the discoverers of the sliding filament theory of muscle contraction.
 He and Andrew Huxley, complimenting the independent works of Hugh Huxley and Jean Hanson, revealed that muscle contraction is due to shortening of the muscle fibres.
 He studied medicine throughout the Second World War, and obtained his MD degree as the war ended in 1945.
 After a brief practise in his hometown, he chose a research career.
 He became associated with Huxley, whom he joined at Cambridge University.
 Together they published a landmark paper in "Nature" in 1954, which became the foundation of muscle mechanics.

Question: What profession does Andrew Huxley and Alan Lloyd Hodgkin have in common?
Answer: biophysicist