Quantum State Engineering with Continuous-Variable Post-Selection

Details Quantum State Engineering with Continuous-Variable Post-Selection Quantum State Engineering with Continuous-Variable Post-Selection

2005-12-13

arxiv.org/abs/quant-ph/0512094v2

Phys. Rev. A 73, 041801 (R) 2006

Physics

Quantum Physics

4 pages, 5 figures, published

Scientific paper

10.1103/PhysRevA.73.041801

We present a scheme to conditionally engineer an optical quantum system via continuous-variable measurements. This scheme yields high-fidelity squeezed single photon and superposition of coherent states, from input single and two photon Fock states respectively. The input Fock state is interacted with an ancilla squeezed vacuum state using a beam-splitter. We transform the quantum system by post-selecting on the continuous-observable measurement outcome of the ancilla state. We experimentally demonstrate the principles of this scheme using displaced coherent states and measure experimentally fidelities that are only achievable using quantum resources.

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