ar X iv : q ua nt - p h / 05 03 11 1 v 1 11 M ar 2 00 5 Conditional generation of arbitrary single - mode quantum states of light by repeated photon subtractions
نویسنده
چکیده
We propose a scheme for the conditional generation of arbitrary finite superpositions of (squeezed) Fock states in a single mode of a traveling optical field. The suggested setup requires only a source of squeezed states, beam splitters, strong coherent beams, and photodetectors with single-photon sensitivity. The method does not require photodetectors with a high efficiency nor with a singlephoton resolution.
منابع مشابه
ar X iv : q ua nt - p h / 02 04 05 9 v 1 1 1 A pr 2 00 2 Optical qubit generation by state truncation using an experimentally feasible scheme
Generation of arbitrary superposition of vacuum and one-photon states using quantum scissors device (QSD) is studied. The device allows the preparation of states by truncating an input coherent light. Optimum values of the intensity of the coherent light for the generation of any desired state using the experimentally feasible QSD scheme are found.
متن کاملar X iv : q ua nt - p h / 05 03 10 3 v 1 1 0 M ar 2 00 5 Schwarz inequality and concurrence
We establish a relation between the Schwarz inequality and the generalized concurrence of an arbitrary, pure, bipartite or tripartite state. This relation places concurrence in a geometrical and functional-analytical setting.
متن کاملar X iv : q ua nt - p h / 01 11 11 0 v 1 2 1 N ov 2 00 1 Generating and probing a two - photon Fock state with a single atom in a cavity
A two-photon Fock state is prepared in a cavity sustaining a " source mode " and a " target mode " , with a single circular Rydberg atom. In a third-order Raman process, the atom emits a photon in the target while scattering one photon from the source into the target. The final two-photon state is probed by measuring by Ramsey interferometry the cavity light shifts induced by the target field o...
متن کاملar X iv : q ua nt - p h / 05 11 05 9 v 1 7 N ov 2 00 5 Phase Sensitivity of a Mach -
The best performance of a Mach-Zehnder interferometer is achieved with the input state |NT /2+ 1〉|NT /2 − 1〉 + |NT /2 − 1〉|NT /2 + 1〉, being NT the total number of atoms/photons. This gives: i) a phase-shift error confidence C68% = 2.67/NT with ii) a single interferometric measurement. Different input quantum states can achieve the Heisenberg scaling ∼ 1/NT but with higher prefactors and at the...
متن کاملHeralded single-photon generation using imperfect single-photon sources and a two-photon-absorbing medium
X iv :q ua nt -p h/ 05 10 11 3 v3 22 M ar 2 00 6 Heralded single-photon generation using imperfect single-photon sources and a two-photon-absorbing medium Thomas Konrad∗, Artur Scherer, Michael Nock, and Jürgen Audretsch Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany Abstract We propose a setup for a heralded, i.e. announced generation of a pure single-photon state given tw...
متن کامل