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Experimental speedup of quantum dynamics through squeezing



Shaun Burd, Hannah Knaack, Raghavendra Srinivas, Christian Arenz, Alejandra Collopy, Laurent Stephenson, Andrew C. Wilson, David Wineland, Dietrich Leibfried, John J. Bollinger, David Allcock, Daniel Slichter


We show experimentally that a broad class of interactions involving quantum harmonic oscillators can be made stronger (amplified) using a unitary squeezing protocol. While our demonstration uses the motional and spin states of a single trapped $^25}$Mg$^+}$ ion, the scheme applies generally to Hamiltonians involving just a single harmonic oscillator as well as Hamiltonians coupling the oscillator to another quantum degree of freedom such as a qubit, covering a large range of systems of interest in quantum information and metrology applications. Importantly, the protocol does not require knowledge of the parameters of the Hamiltonian to be amplified, nor does it require a well-defined phase relationship between the squeezing interaction and the rest of the system dynamics, making it potentially useful in instances where certain aspects of a signal or interaction may be unknown or uncontrolled.
Nature Physics


trapped ion, squeezing, quantum amplification


Burd, S. , Knaack, H. , Srinivas, R. , Arenz, C. , Collopy, A. , Stephenson, L. , Wilson, A. , Wineland, D. , Leibfried, D. , Bollinger, J. , Allcock, D. and Slichter, D. (2024), Experimental speedup of quantum dynamics through squeezing, Nature Physics, [online],, (Accessed June 25, 2024)


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Created April 17, 2024, Updated June 7, 2024