Create a Physics World account to get access to all available digital issues of the monthly magazine. Your Physics World account is separate to any IOP acco ...

If you pull twice as hard on a spring, it stretches twice as far. However, when we introduce very large forces or complicated interactions, that linear rule breaks down into a "nonlinear" regime.

Experimental measurements of higher-order correlation functions in many-body systems provide insight into a non-trivial quantum field theory and how it can be implemented in a cold-atom quantum ...