Creation of Two-Mode Squeezed States in Atomic Mechanical Oscillators

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. Here, we experimentally demonstrate 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.

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• Quantum information with continuous variables
• Gaussian Quantum Information
• Bell nonlocality
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• Inseparability criterion for continuous variable systems
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• Superposition of two-mode squeezed states for quantum information processing and quantum sensing
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Cited by in corpus (6)

• Enhancement of nonclassical properties of two-mode squeezed vacuum state with postselected von Neumann measurement
• Engineering continuous-variable entanglement in mechanical oscillators with optimal control
• Nonclassical states of light induced via measurement in a bimodalsystem
• Multiparameter quantum metrology at Heisenberg scaling for an arbitrary two-channel linear interferometer with squeezed light
• Dynamically stable two-mode squeezing in cavity optomechanics
• A heralded single-photon source implemented with second-order nonlinear photonic crystals