Quantum-state engineering with continuous-variable postselection

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787058

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

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

We present a scheme to conditionally engineer an optical quantum system via continuous-variable measurements. This scheme yields high-fidelity squeezed single photons and a 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 postselecting on the continuous-observable measurement outcome of the ancilla state. We experimentally demonstrate the principles of this scheme using coherent states and experimentally measure fidelities that are only achievable using quantum resources.

• OSTI ID: 20787058
• Journal Information: Physical Review. A, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevA.73.041801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION OPERATORS
BEAM SPLITTING
EIGENSTATES
ENERGY LEVELS
PHOTON BEAMS
PHOTONS
QUANTUM MECHANICS
VACUUM STATES