Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition

doi:10.1103/PHYSREVA.75.052323

Title: Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition

Full Record
Other Related Research

Abstract

It is shown that a large class of weak disturbances on macroscopic quantum superpositions can be canceled by a probabilistic reversing operation on the system. We illustrate this for spin systems undergoing an Ising-type interaction with the environment and demonstrate that both the fidelity to the original state and the purity of the amended state can simultaneously be increased by the reversing operation. A possible experimental scheme to implement our scheme is discussed.

Authors:

Terashima, Hiroaki; Ueda, Masahito ^[1]; CREST, Japan Science and Technology Corporation ^[2]

Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)
(JST), Saitama 332-0012 (Japan)

Publication Date:: Tue May 15 00:00:00 EDT 2007

OSTI Identifier:: 20982492

Resource Type:: Journal Article

Resource Relation:: Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.75.052323; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DISTURBANCES; INTERACTIONS; ISING MODEL; OPERATION; PROBABILISTIC ESTIMATION; PROBABILITY; SPIN

Citation Formats


                    Terashima, Hiroaki, Ueda, Masahito, and CREST, Japan Science and Technology Corporation. Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition.  United States: N. p., 2007. 
        Web.  doi:10.1103/PHYSREVA.75.052323.

Copy to clipboard


                    Terashima, Hiroaki, Ueda, Masahito, & CREST, Japan Science and Technology Corporation. Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition.  United States.  doi:10.1103/PHYSREVA.75.052323.

Copy to clipboard


                    Terashima, Hiroaki, Ueda, Masahito, and CREST, Japan Science and Technology Corporation. Tue .  
        "Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition".  United States.  
        doi:10.1103/PHYSREVA.75.052323.

Copy to clipboard


                    
@article{osti_20982492,

  title        = {Probabilistic reversing operation with fidelity and purity gain for macroscopic quantum superposition},

  author       = {Terashima, Hiroaki and Ueda, Masahito and CREST, Japan Science and Technology Corporation},

  abstractNote = {It is shown that a large class of weak disturbances on macroscopic quantum superpositions can be canceled by a probabilistic reversing operation on the system. We illustrate this for spin systems undergoing an Ising-type interaction with the environment and demonstrate that both the fidelity to the original state and the purity of the amended state can simultaneously be increased by the reversing operation. A possible experimental scheme to implement our scheme is discussed.},

  doi          = {10.1103/PHYSREVA.75.052323},

  journal      = {Physical Review. A},

  number       = 5,

  volume       = 75,

  place        = {United States},

  year         = {Tue May 15 00:00:00 EDT 2007},

  month        = {Tue May 15 00:00:00 EDT 2007}

}

Copy to clipboard

Journal Article:

DOI: 10.1103/PHYSREVA.75.052323

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning

Journal Article De Martini, Francesco ; Accademia Nazionale dei Lincei, via della Lungara 10, I-00165 Roma ; Sciarrino, Fabio ; ... - Physical Review. A

The high resilience to decoherence shown by a recently discovered macroscopic quantum superposition (MQS) generated by a quantum-injected optical parametric amplifier and involving a number of photons in excess of 5x10{sup 4} motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on |{alpha}> and N-photon maximally entangled states (NOON), in the perspective of the comprehensive theory of the subject by Zurek. In that perspective the concepts of 'pointer state' and 'environment-induced superselection' are applied to the new scheme.
DOI: 10.1103/PHYSREVA.79.052305
Motional macroscopic quantum superposition states of a trapped three-level ion

Journal Article Muestecaplioglu, Oe. E. - Physical Review. A

We investigate quantum dynamical properties of a trapped three-level ion interacting with two laser beams in {lambda} configuration. A unitary transformation method is developed to study the interaction of the ion with its vibrational phonons, quanta of ion's own center-of-mass motion. Under certain conditions on laser parameters, this interaction is shown to be unitarily equivalent to two-phonon cascade transitions. Complicated temporal behaviors of level populations and mean number of phonons are described clearly by identifying dynamical variables of the cascade model as building blocks. Furthermore, analyzing quantum states of vibrational phonons by Husimi-Q function, we find that at times, determinedmore »« less
DOI: 10.1103/PhysRevA.68.023811
Generating macroscopic-quantum-superposition states in momentum and internal-state space from Bose-Einstein condensates with repulsive interactions

Journal Article Higbie, J. ; Stamper-Kurn, D.M. - Physical Review. A

Resonant Raman coupling between internal levels can create double-well momentum-space potentials for multilevel 'periodically-dressed' atoms. We develop a many-body formalism for a weakly interacting, trapped periodically dressed Bose gas which illustrates how a tunable exchange interaction yields correlated many-body ground states. In contrast to the case of a position-space double well, the ground state of stable periodically-dressed Bose gases with repulsive interactions tends toward a macroscopic superposition state in the regime where interactions dominate the momentum-space tunneling induced by the external trapping potential. We discuss how real-time control of experimental parameters can be used to create macroscopic quantum superpositions ofmore »« less
DOI: 10.1103/PhysRevA.69.053605
Preparation of macroscopic quantum superposition states of a cavity field via coupling to a superconducting charge qubit

Journal Article Liu Yuxi ; Wei, L.F. ; Institute of Quantum Optics and Quantum Information, Department of Physics, Shanghai Jiaotong University, Shanghai 200030 ; ... - Physical Review. A

We propose how to generate macroscopic quantum superposition states using a microwave cavity containing a superconducting charge qubit. Based on the measurement of charge states, we show that the superpositions of two macroscopically distinguishable coherent states of a single-mode cavity field can be generated by a controllable interaction between a cavity field and a charge qubit. After such superpositions of the cavity field are created, the interaction can be switched off by the classical magnetic field, and there is no information transfer between the cavity field and the charge qubit. We also discuss the generation of the superpositions of twomore » squeezed coherent states.« less
DOI: 10.1103/PhysRevA.71.063820
Creation, detection, and decoherence of macroscopic quantum superposition states in double-well Bose-Einstein condensates

Journal Article Huang, Y. P. ; Moore, M. G. - Physical Review. A

We study the possibility of creating many-particle macroscopic quantum superposition (Schroedinger cat)-like states by using a Feshbach resonance to reverse the sign of the scattering length of a Bose-Einstein condensate trapped in a double-well potential. To address the issue of the experimental verification of coherence in the catlike state, we study the revival of the initial condensate state in the presence of environmentally induced decoherence. As a source of decoherence, we consider the interaction between the atoms and the electromagnetic vacuum, due to the polarization induced by an incident laser field. We find that the resulting decoherence is directly relatedmore »« less
DOI: 10.1103/PHYSREVA.73.023606

Similar Records