Liu Xiao-Shu

High-dimensional multi-particle cat-like state teleportation

Two kinds of M-particle d-dimensional Schmidt-form entangled state teleportation protocols are presented. In the first protocol, the teleportation is achieved by d-dimensional Bell-basis measurements, while in the second protocol it is realized by d-dimensional GHZ-basis measurement.

A Theoretical Scheme for Multi-user Quantum Key Distribution with N Einstein-Podolsky-Rosen Pairs on a Passive Optical Network

We propose a theoretical scheme for any-to-any multi-user quantum key distribution on a passive optical network with ordered N Einstein-Podolsky-Rosen pairs. This scheme is safe and more efficient than those with single photons. Its efficiency approaches 100% in the limit that the number of pairs used in the eavesdropping check becomes negligible. It also has high capacity and is convenient for users.

Bang-bang control suppression of amplitude damping in a three-level atom

By using quantum bang-bang control technique, we studied the suppression of amplitude damping, or energy dissipation, in a three-level atom in various configurations. We have explicitly given the bang-bang control groups in three different configurations, and the pulse sequences for these bang-bang control operations.

Decoupling Bang-Bang Group for Adiabatic Decoherence Control in a Three-Level Atom*

In this paper, we study the control problem of adiabatic decoherence in a three-level atom. We will find the decoupling bang-bang group for various configurations, including the V configuration and the cascade type of three-level atom subjected to adiabatic decoherence. We also give the programs to design a sequence of periodic twinborn pulses to suppress the decoherence.

General Decoherence Suppression in Three-Level Atom in V- and Ξ-Configurations

In this paper, we present the decoupling bang-bang (BB) twin-born pulses to suppress the general decoherence, both amplitude and phase decoherence, in a three-level atom in V- and Ξ-configurations. We give the exact sequence of periodic twinborn pulses in such systems.

Suppression of Amplitude Decoherence in Arbitrary n-Level Atom in ≡-Configuration with Bang-Bang Controls

In this paper, we give Bang–Bang (BB) decoupling schemes to suppress the amplitude decoherence in the five- and six-level atom systems in Ξ-configuration. We generalize this scheme to the arbitrary level atom system in Ξ-configuration. The corresponding decoupling operators are given explicitly.

Suppression of Phase and Amplitude Damping Decoherence in a Three-Level Atom in Λ-Configuration Using Bang-Bang Controls

In this paper, we present decoupling bang-bang operations for the suppression of general decoherence, both amplitude and phase damping, in a three-level system in Λ-configuration. We give a program to design a sequence of periodic twinborn pulses to suppress the decoherence in such the system.

Simultaneous space and time synchronization using shared entangled qubits

This paper generalizes the quantum clock synchronization protocol of Josza, et al., [Richard Jozsa, et al., Phys. Rev. Lett. 85 (2000) 2010] to synchronize space and time simultaneously.

A remote quantum adding machine

We design a scheme to perform additions of N remote addends. This adder is useful for some quantum information processing purposes, such as statistics and multi-party quantum game. The quantum remote adder is constructed by using a multi-party superdense coding scheme.