Conditional quantum-state engineering using ancillary squeezed-vacuum states

Abstract

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 $n\le 4$, 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.

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

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Cited by in corpus (11)

• Generating "squeezed" superpositions of coherent states using photon addition and subtraction
• Experimental quantum tomography of a homodyne detector
• Characterizations and Quantifications of Macroscopic Quantumness and Its Implementations using Optical Fields
• Testing Bell inequalities with photon-subtracted Gaussian states
• Quantum Cloning of Continuous Variable Entangled States
• Noise excess free record/upload of non-classical states to continuous-variable quantum memory
• Quantum state engineering using weak measurement
• Iterative tailoring of optical quantum states with homodyne measurements
• Quantum state engineering via coherent-state superpositions in traveling optical fields
• Nonclassicalities of hybrid coherent states
• Transfer of different types of optical qubits over a lossy environment