Conditional quantum-state engineering using ancillary squeezed-vacuum states

Journal Article · Fri Sep 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.033813· OSTI ID:20857764

Jeong, Hyunseok; Ralph, Timothy C ^[1]; Lance, Andrew M; Grosse, Nicolai B; Symul, Thomas; Lam, Ping Koy ^[2]

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1. Department of Physics, University of Queensland, St Lucia, Queensland 4072 (Australia)
2. Quantum Optics Group, Department of Physics, Faculty of Science, Australian National University, ACT 0200 (Australia)

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{<=}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.

• OSTI ID: 20857764
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION OPERATORS
BEAM SPLITTING
DATA TRANSMISSION
DETECTION
EIGENSTATES
ENERGY LEVELS
PARITY
PHOTONS
QUANTUM ENTANGLEMENT
VACUUM STATES