Experimentally realizable quantum comparison of coherent states and its applications
نویسندگان
چکیده
Erika Andersson, Marcos Curty, and Igor Jex Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, UK Quantum Information Theory Group, Institut für Theoretische Physik I, and Max-Planck Research Group, Institute of Optics, Information and Photonics, Universität Erlangen-Nürnberg, Staudtstraße 7/B2, 91058 Erlangen, Germany Department of Physics, FNSPE Czech Technical University in Prague Břehová 7, 115 19 Praha 1, Czech Republic (Dated: August 16, 2006)
منابع مشابه
Attaining subclassical metrology in lossy systems with entangled coherent states
Quantum mechanics allows entanglement enhanced measurements to be performed, but loss remains an obstacle in constructing realistic quantum metrology schemes. However, recent work has revealed that entangled coherent states (ECSs) have the potential to perform robust subclassical measurements [J. Joo et al., Phys. Rev. Lett. 107, 083601 (2011)]. Up to now no read-out scheme has been devised tha...
متن کاملTeleportation via an Entangled Coherent Channel and Decoherence Effect on This Channel
We study an entangled two-mode coherent state within the framework of2×2-dimensional Hilbert space. We investigate the problem of quantum teleportation ofa superposition coherent state via an entangled coherent channel. By three differentmeasures with the titles ``minimum assured fidelity (MASF)”, ``average teleportationfidelity” and ``optimal fidelity (f)” we study the ...
متن کاملبررسی خواص کوانتومی حالتهای همدوس دومدی درهمتنیده
Coherent states are the quantum states, which give the closest description to classical states. Since their superpositions show quantum properties, research on these states has been of great interest. In addition, having nonclassical properties is necessary for quantum correlations. In this paper, we focus on two-mode entangled coherent states which are out of phase, and study the nonclassical...
متن کاملCoherent Transport of Single Photon in a Quantum Super-cavity with Mirrors Composed of Λ-Type Three-level Atomic Ensembles
In this paper, we study the coherent transport of single photon in a coupled resonator waveguide (CRW) where two threelevel Λ-type atomic ensembles are embedded in two separate cavities. We show that it is possible to control the photon transmission and reflection coefficients by using classical control fields. In particular, we find that the total photon transmission and reflection are achieva...
متن کامل6.453 Quantum Optical Communication
Optical communication with two-photon coherent states—Part II: photoemissive detection and structured receiver performance, " IEEE Trans. Optical communication with two-photon coherent states—Part III: quantum measurements realizable with photoemissive detec tors, " IEEE Trans. Quantum noise and excess noise in optical homodyne and het erodyne receivers, " IEEE J.
متن کامل