Conditional quantum-state engineering using ancillary squeezed-vacuum states

Details Conditional quantum-state engineering using ancillary squeezed-vacuum states Conditional quantum-state engineering using ancillary squeezed-vacuum states

2006-06-19

arxiv.org/abs/quant-ph/0606153v2

Phys. Rev. A 74, 033813 (2006)

Physics

Quantum Physics

10 pages, 14 figures, use pdf version, high quality figures available on request

Scientific paper

10.1103/PhysRevA.74.033813

We investigate an optical scheme to conditionally engineer quantum states using a beam splitter, homodyne detection and a squeezed vacuum as an ancillar state. This scheme is efficient in producing non-Gaussian quantum states such as squeezed single photons and superpositions of coherent states (SCSs). We show that a SCS with well defined parity and high fidelity can be generated from a Fock state of $n\leq4$, and conjecture that this can be generalized for an arbitrary $n$ Fock state. We describe our experimental demonstration of this scheme using coherent input states and measuring experimental fidelities that are only achievable using quantum resources.

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