On Wednesday 17th of October we had the pleasure to welcome Dr. Chris Wade from Oxford University to give a seminar to the AMOPP group about progress towards interferometry with exotic quantum states of light, more specifically Holland-Burnett states. This was a very interesting talk with a great mix of theory and experimental results. The abstract can be seen below.

Towards enhanced interferometry using quantum states of light

Quantum metrology is concerned with the enhanced measurement precision that may be gained by exploiting quantum mechanical correlations. In the scenario presented by optical inteferometry, several successful implementations have already been demonstrated including gravitational wave detectors [1], and lab-scale experiments [2,3]. However there are still open problems to be solved, including loss tolerance and scalability. In this seminar I will present progress implementing loss-tolerant Holland-Burnett states [4], and work searching for other practical states to implement [5].

[1] Schnabel et al. Nat. Comm. 1. 121 (2010)
[2] Slussarenko et al. Nat. Phot. 11, 700 (2017)
[3] Yonezawa et al. Science, 337, 1514 (2012)
[4] Holland and Burnett, PRL, 71, 1355 (1993)
[5] Knott et al, PRA, 93, 033859 (2016)