Selected publications

Quantum state estimation

• Detecting drift of a quantum source
• State estimation using information criteria

  Verification of entanglement (theory)

• There's entanglement in the Hong-Ou-Mandel dip
• A universal quantity to calculate from finite data
• Beware of "direct measurements"!
• Using strengthened Bell inequalities for entanglement verification
• How to verify entanglement in experiments, and what can go wrong

  Verification of entanglement (experiments)

• Performed in Kimble's lab in 2010
• Performed in Kimble's lab in 2009
• Performed in Kimble's lab in 2005

  Photons and entanglement

• Purity of single-photon and two-photon states and entanglement
• How even a single-photon state can have entanglement
• Why it is field modes that are entangled, not photons

  Angular momentum of light

• How spin and orbital angular momentum of light are transfered to the internal and external degrees of motion of an atom.
• The quantum theory of spin and orbital angular momentum of light.
• On rotating photons, whose mode pattern and/or polarization pattern slowly rotate in both space and time

  Strongly focused light interacting with a single atom

• Dipole waves and strong focusing
• Photon statistics and strong focusing

  Entangled coherent states of light

• Teleportation and decoherence of entangled coherent states

  Entanglement theory

• The concurrence of assistance

  References in quantum information

• The refbit, a unit quantifying the resource of sharing a reference frame
• The quantum state of a laser, and its use as reference; the short version
• The quantum state of a laser; the long version

  Mechanical effects of light

• Entropy balance in laser cooling etc.
• Laser cooling inside an optical cavity