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Papers by Mang Feng

Research paper thumbnail of Quantum gates using electronic and nuclear spins of Yb+ in a magnetic field gradient

The European Physical Journal D, 2011

Research paper thumbnail of Superdense Coding via Hot Trapped Ions

Communications in Theoretical Physics, 2004

ABSTRACT

Research paper thumbnail of Simple Approach to the Solution of a Trapped and Radiated Cold Ion Beyond the Lamb–Dicke Limit

Communications in Theoretical Physics, 2002

ABSTRACT

Research paper thumbnail of Effect of the Double Frequency of Trap Field in a Paul Trap

Communications in Theoretical Physics, 2001

ABSTRACT

Research paper thumbnail of Stabilizing Chaos in the rf-Driven Josephson Junction

Communications in Theoretical Physics, 2000

ABSTRACT

Research paper thumbnail of Series solution of two trapped ions experiencing the standing wave of a resonant laser

Physics Letters A, 1999

Two identical two-level ions driven by a standing wave laser on resonance in a harmonic trap are ... more Two identical two-level ions driven by a standing wave laser on resonance in a harmonic trap are investigated in the Lamb–Dicke limit and weak excitation regime. We present series solutions of such a system for the trap center staying at a node of the standing wave.

Research paper thumbnail of Non-Markovian decoherence dynamics of entangled coherent states

Research paper thumbnail of Fast optical cooling of nanomechanical cantilever with the dynamical Zeeman effect

Optics express, Jan 2, 2013

We propose an efficient optical electromagnetically induced transparency (EIT) cooling scheme for... more We propose an efficient optical electromagnetically induced transparency (EIT) cooling scheme for a cantilever with a nitrogen-vacancy center attached in a non-uniform magnetic field using dynamical Zeeman effect. In our scheme, the Zeeman effect combined with the quantum interference effect enhances the desired cooling transition and suppresses the undesired heating transitions. As a result, the cantilever can be cooled down to nearly the vibrational ground state under realistic experimental conditions within a short time. This efficient optical EIT cooling scheme can be reduced to the typical EIT cooling scheme under special conditions.

Research paper thumbnail of Exhibition of the periodicity of Quantum Fourier Transformation in Nuclear Magnetic Resonance

The remarkable capability of quantum Fourier transformation (QFT) to extract the periodicity of a... more The remarkable capability of quantum Fourier transformation (QFT) to extract the periodicity of a given periodic function has been exhibited by using nuclear magnetic resonance (NMR) techniques. Two separate sets of experiments were performed. In a full QFT, the periodicity were validated with state tomography and fidelity measurements. For a simplified QFT, the three-qubit pseudo-pure state was created by introducting

Research paper thumbnail of One-step generation of multipartite entanglement among nitrogen-vacancy center ensembles

Scientific Reports, 2015

We describe a one-step, deterministic and scalable scheme for creating macroscopic arbitrary enta... more We describe a one-step, deterministic and scalable scheme for creating macroscopic arbitrary entangled coherent states (ECSs) of separate nitrogen-vacancy center ensembles (NVEs) that couple to a superconducting flux qubit. We discuss how to generate the entangled states between the flux qubit and two NVEs by the resonant driving. Then the ECSs of the NVEs can be obtained by projecting the flux qubit, and the entanglement detection can be realized by transferring the quantum state from the NVEs to the flux qubit. Our numerical simulation shows that even under current experimental parameters the concurrence of the ECSs can approach unity. We emphasize that this method is straightforwardly extendable to the case of many NVEs.

Research paper thumbnail of Quantum Algorithms and Mathematical Formulations of Bio-Molecular Solutions of the Vertex Cover Problem in the Finite-Dimensional Hilbert Space

IEEE transactions on nanobioscience, Jan 5, 2014

In this paper, it is shown that the proposed quantum algorithm for implementing Boolean circuits ... more In this paper, it is shown that the proposed quantum algorithm for implementing Boolean circuits generated from the DNA-based algorithm solving the vertex-cover problem of any graph G with m edges and n vertices is the optimal quantum algorithm. Next, it is also demonstrated that mathematical solutions of the same bio-molecular solutions are represented in terms of a unit vector in the finite-dimensional Hilbert space. Furthermore, for testing our theory, a nuclear magnetic resonance (NMR) experiment of three quantum bits to solve the simplest vertex-cover problem is completed.

Research paper thumbnail of Quantum algorithms of the vertex cover problem on a quantum computer

Research paper thumbnail of Non-Markovian effect on the quantum discord

Research paper thumbnail of Systematic QSOs emission line shifts caused by a high-temperature mechanism

Il Nuovo Cimento B, 1996

Summary The observed results exhibit the fact that there are some systematic effects in QSOs spe... more Summary The observed results exhibit the fact that there are some systematic effects in QSOs spectra, such as: a) the different emission lines give different red-shifts; b) high-ionization lines (HILs) CIV λ1549, NV, CIII] X.1909 and possiblyLy α are systematically blue-shifted to a velocity of about 600 km s−1 with respect to low-ionization lines (LILs) 01, Mgll λ2798 and the balmer

Research paper thumbnail of Simultaneous intraportation of many quantum states within the quantum computing network

Research paper thumbnail of Experimental implementation of remote state preparation by nuclear magnetic resonance

Research paper thumbnail of Sudden death and birth of entanglement beyond the Markovian approximation

Research paper thumbnail of Stationary system of a two-level atom interacting with a single-mode phonon

Research paper thumbnail of Teleportation with trapped ions in a magnetic field gradient

Research paper thumbnail of A variational study of the self-trapped magnetic polaron formation in double-exchange model

Physics Letters A, 2005

We study the formation of self-trapped magnetic polaron (STMP) in an antiferro/ferromagnetic doub... more We study the formation of self-trapped magnetic polaron (STMP) in an antiferro/ferromagnetic double-exchange model semi-analytically by variational solutions. It is shown that the Jahn–Teller effect is not essential to the STMP formation and the STMP forms in the antiferromagnetic material within the region of the order of the lattice constant. We also confirm that no ground state STMP exists in the ferromagnetic background, but the ground state bound MP could appear due to the impurity potential.

Research paper thumbnail of Quantum gates using electronic and nuclear spins of Yb+ in a magnetic field gradient

The European Physical Journal D, 2011

Research paper thumbnail of Superdense Coding via Hot Trapped Ions

Communications in Theoretical Physics, 2004

ABSTRACT

Research paper thumbnail of Simple Approach to the Solution of a Trapped and Radiated Cold Ion Beyond the Lamb–Dicke Limit

Communications in Theoretical Physics, 2002

ABSTRACT

Research paper thumbnail of Effect of the Double Frequency of Trap Field in a Paul Trap

Communications in Theoretical Physics, 2001

ABSTRACT

Research paper thumbnail of Stabilizing Chaos in the rf-Driven Josephson Junction

Communications in Theoretical Physics, 2000

ABSTRACT

Research paper thumbnail of Series solution of two trapped ions experiencing the standing wave of a resonant laser

Physics Letters A, 1999

Two identical two-level ions driven by a standing wave laser on resonance in a harmonic trap are ... more Two identical two-level ions driven by a standing wave laser on resonance in a harmonic trap are investigated in the Lamb–Dicke limit and weak excitation regime. We present series solutions of such a system for the trap center staying at a node of the standing wave.

Research paper thumbnail of Non-Markovian decoherence dynamics of entangled coherent states

Research paper thumbnail of Fast optical cooling of nanomechanical cantilever with the dynamical Zeeman effect

Optics express, Jan 2, 2013

We propose an efficient optical electromagnetically induced transparency (EIT) cooling scheme for... more We propose an efficient optical electromagnetically induced transparency (EIT) cooling scheme for a cantilever with a nitrogen-vacancy center attached in a non-uniform magnetic field using dynamical Zeeman effect. In our scheme, the Zeeman effect combined with the quantum interference effect enhances the desired cooling transition and suppresses the undesired heating transitions. As a result, the cantilever can be cooled down to nearly the vibrational ground state under realistic experimental conditions within a short time. This efficient optical EIT cooling scheme can be reduced to the typical EIT cooling scheme under special conditions.

Research paper thumbnail of Exhibition of the periodicity of Quantum Fourier Transformation in Nuclear Magnetic Resonance

The remarkable capability of quantum Fourier transformation (QFT) to extract the periodicity of a... more The remarkable capability of quantum Fourier transformation (QFT) to extract the periodicity of a given periodic function has been exhibited by using nuclear magnetic resonance (NMR) techniques. Two separate sets of experiments were performed. In a full QFT, the periodicity were validated with state tomography and fidelity measurements. For a simplified QFT, the three-qubit pseudo-pure state was created by introducting

Research paper thumbnail of One-step generation of multipartite entanglement among nitrogen-vacancy center ensembles

Scientific Reports, 2015

We describe a one-step, deterministic and scalable scheme for creating macroscopic arbitrary enta... more We describe a one-step, deterministic and scalable scheme for creating macroscopic arbitrary entangled coherent states (ECSs) of separate nitrogen-vacancy center ensembles (NVEs) that couple to a superconducting flux qubit. We discuss how to generate the entangled states between the flux qubit and two NVEs by the resonant driving. Then the ECSs of the NVEs can be obtained by projecting the flux qubit, and the entanglement detection can be realized by transferring the quantum state from the NVEs to the flux qubit. Our numerical simulation shows that even under current experimental parameters the concurrence of the ECSs can approach unity. We emphasize that this method is straightforwardly extendable to the case of many NVEs.

Research paper thumbnail of Quantum Algorithms and Mathematical Formulations of Bio-Molecular Solutions of the Vertex Cover Problem in the Finite-Dimensional Hilbert Space

IEEE transactions on nanobioscience, Jan 5, 2014

In this paper, it is shown that the proposed quantum algorithm for implementing Boolean circuits ... more In this paper, it is shown that the proposed quantum algorithm for implementing Boolean circuits generated from the DNA-based algorithm solving the vertex-cover problem of any graph G with m edges and n vertices is the optimal quantum algorithm. Next, it is also demonstrated that mathematical solutions of the same bio-molecular solutions are represented in terms of a unit vector in the finite-dimensional Hilbert space. Furthermore, for testing our theory, a nuclear magnetic resonance (NMR) experiment of three quantum bits to solve the simplest vertex-cover problem is completed.

Research paper thumbnail of Quantum algorithms of the vertex cover problem on a quantum computer

Research paper thumbnail of Non-Markovian effect on the quantum discord

Research paper thumbnail of Systematic QSOs emission line shifts caused by a high-temperature mechanism

Il Nuovo Cimento B, 1996

Summary The observed results exhibit the fact that there are some systematic effects in QSOs spe... more Summary The observed results exhibit the fact that there are some systematic effects in QSOs spectra, such as: a) the different emission lines give different red-shifts; b) high-ionization lines (HILs) CIV λ1549, NV, CIII] X.1909 and possiblyLy α are systematically blue-shifted to a velocity of about 600 km s−1 with respect to low-ionization lines (LILs) 01, Mgll λ2798 and the balmer

Research paper thumbnail of Simultaneous intraportation of many quantum states within the quantum computing network

Research paper thumbnail of Experimental implementation of remote state preparation by nuclear magnetic resonance

Research paper thumbnail of Sudden death and birth of entanglement beyond the Markovian approximation

Research paper thumbnail of Stationary system of a two-level atom interacting with a single-mode phonon

Research paper thumbnail of Teleportation with trapped ions in a magnetic field gradient

Research paper thumbnail of A variational study of the self-trapped magnetic polaron formation in double-exchange model

Physics Letters A, 2005

We study the formation of self-trapped magnetic polaron (STMP) in an antiferro/ferromagnetic doub... more We study the formation of self-trapped magnetic polaron (STMP) in an antiferro/ferromagnetic double-exchange model semi-analytically by variational solutions. It is shown that the Jahn–Teller effect is not essential to the STMP formation and the STMP forms in the antiferromagnetic material within the region of the order of the lattice constant. We also confirm that no ground state STMP exists in the ferromagnetic background, but the ground state bound MP could appear due to the impurity potential.

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