• Professor of research, CSIC (2005 – today)
• Fulbright fellow, Dept. Physics of Princeton Univ. (April-June 2015)
• Scientic researcher, CSIC (1989 – 2005).
• Fellow at CERN, Geneva  (1987 – 1989).
• Titular professor at Univ. Complutense de Madrid (1984 – 1987).
• Postdoc at l’Ecole Normale Superieure, Paris  (1981 -1983).
• PhD in Physics, Univ. Complutense of Madrid (1981).
• Graduate in Physics, Univ. Complutense of Madrid  (1978).

Visiting appointments:

Quantum Research Centre, Technology Innovation Institute, Abu Dhabi 2020, 2021; Max Planck Institute for Quantum Optics, Garching 2008-2019; Dept. of Phys. Chongquing Univ. 2017; Center of Quantum Technologies, Singapore 2017; Simons Center for Geometry and Physics, Stony Brook 2016, 2017; Newton Institute for Maths, Cambridge 2016; Lab. Phys. Theor. Ecole Normale Superieure, Paris 2015; International Institute of Physics, Natal 2012, 2014, 2015; Institut Henri Poincaré, Paris 2011; Instituto de Física de Sao Carlos, Univ. de Sao Paolo 2010, 2017; Dept. Phys. City Univ. London 2010; Galileo Galilei Inst for Theor. Phy., Firenze 2008, 2012, 2014; Dept. Maths. Bristol Univ. 2007, 2014; Dept. Theor. Phys. Australian National University 2006; Newman Lab, Cornell Univ. Ithaca 2003, 2007; SISSA, Trieste 2002, 2004, 2016; U. Politecnica, Torino 2002; Kavli Institute for Theoretical Physics, U. Santa Barbara 1997, 1998, 2018; Dept. Fis. Teor. Univ. Bolonia 1997; Dept. Theor. Phys. Univ. Stuttgart 1997; Theor. Inst. Phys. CNRS, Burdeos 1996; Erwin Schroedinger Institute, Wien 1996, 2018; Inst. Theor. Phys. ETH, Zurich 1995; Dept. Phys. Theor. Geneva 1990-91-92; ICTP Trieste 1988; Dept. Phys. Lawrence Berkeley Lab 1986; Center of Physics, Aspen 1986, 2016; DAMTP, Cambridge 1984;