Title: 
Creation of two-mode squeezed states in atomic mechanical oscillators

Speaker: Prof. Shau-Yu Lan (藍劭宇副教授), Department of Physics, NTU

Time and place: 1:20 PM, 10/02, Physics Building R019. 

Abstract:
Two-mode squeezed states, which are entangled states with bipartite quantum correlations 
in continuous-variable systems, are crucial in quantum information processing and 
metrology. Recently, continuous‐variable quantum computing with the vibrational modes of 
trapped atoms has emerged with significant progress, featuring a high degree of control 
in hybridizing with spin qubits. Creating two-mode squeezed states in such a platform 
could enable applications that are only viable with photons. In this talk, I will 
present our experimental demonstration of two‐mode squeezed states by employing atoms in 
a two‐dimensional optical lattice as quantum registers. The states are generated by a 
controlled projection conditioned on the relative phase of two independent squeezed 
states. The individual squeezing is created by sudden jumps of the oscillators’ 
frequencies, allowing generating of the two‐mode squeezed states at a rate within a 
fraction of the oscillation frequency. We validate the states by entanglement steering
criteria and Fock state analysis. Our results can be applied in other mechanical 
oscillators for quantum sensing and continuous‐variable quantum information.