Quantum State Engineering with Continuous-Variable Post-Selection
arXiv:quant-ph/0512094 · doi:10.1103/PhysRevA.73.041801
Abstract
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.
4 pages, 5 figures, published
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- Demonstration of Coherent State Discrimination Using a Displacement Controlled Photon Number Resolving Detector
- Demonstration of deterministic and high fidelity squeezing of quantum information
- Discrimination of binary coherent states using a homodyne detector and a photon number resolving detector
- Examples of Gaussian cluster computation
- Characterizations and Quantifications of Macroscopic Quantumness and Its Implementations using Optical Fields
- Generating a Schrödinger-cat-like state via a coherent superposition of photonic operations
- Testing Bell inequalities with photon-subtracted Gaussian states
- Conditional quantum-state engineering using ancillary squeezed-vacuum states
- Noise excess free record/upload of non-classical states to continuous-variable quantum memory
- Quantum state engineering via coherent-state superpositions in traveling optical fields
- Transfer of different types of optical qubits over a lossy environment
- Heralded dissipative preparation of nonclassical states in a Kerr oscillator
- Displaced rotations of coherent states