Demonstration of deterministic and high fidelity squeezing of quantum information

Abstract

By employing at recent proposal (R. Filip, P. Marek and U.L. Andersen, Phys. Rev. A {\bf 71}, 042308 (2005) \cite{Filip05.pra}), we experimentally demonstrate a universal, deterministic and high-fidelity squeezing transformation of an optical field. It relies only on linear optics, homodyne detection, feedforward and an ancillary squeezed vacuum state, thus direct interaction between a strong pump and the quantum state is circumvented. We demonstrate three different squeezing levels for a coherent state input. This scheme is highly suitable for the fault-tolerant squeezing transformation in a continuous variable quantum computer.

5 pages, 4 figures

References in corpus (5)

• Universal Quantum Computation with Continuous-Variable Cluster States
• 7 dB quadrature squeezing at 860 nm with periodically-poled KTiOPO4
• Quantum Teleportation of Optical Quantum Gates
• Universal optical amplification without nonlinearity
• Squeezed state purification with linear optics and feed forward

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• Protecting Quantum Information with Entanglement and Noisy Optical Modes
• Complete State Reconstruction of a Two-Mode Gaussian State via Local Operations and Classical Communication