Quantum teleportation via two-qubit Heisenberg XYZ chain

2014 ◽  
Vol 92 (5) ◽  
pp. 406-410 ◽  
Author(s):  
Nour Zidan
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Quantum Teleportation ◽  
Initial System ◽  
Entangled State ◽  
Initial State ◽  
Intrinsic Decoherence ◽  
Average Fidelity ◽  
Moriya Interaction

Quantum teleportation via the entanglement channel composed of a two-qubit Heisenberg XYZ chain with Dzyaloshinskii–Moriya interaction in the presence of both inhomogeneous external magnetic field and intrinsic decoherence has been investigated. It is shown that the initial state of the channel plays an important role in the fully entangled fraction and the average fidelity of teleportation. It is found that when the initial system is in the entangled state |Ψ⟩ = m2|01⟩ + n2|10⟩ the corresponding average fidelity is always larger than 2/3.

Quantum teleportation in a three-qubit Heisenberg chain with Dzyaloshinsky–Moriya interaction

2015 ◽  
Vol 29 (20) ◽  
pp. 1550107 ◽  
Author(s):  
Yu-Xing Xi ◽  
Yan-Xia Huang
Keyword(s):  
Magnetic Field ◽  
Quantum Teleportation ◽  
Homogeneous Magnetic Field ◽  
Spin Chains ◽  
Coupling Coefficients ◽  
Heisenberg Chain ◽  
Average Fidelity ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chains ◽  
Moriya Interaction

The quantum teleportation via thermally entangled states of three-qubit Heisenberg spin chains with Dzyaloshinsky–Moriya (DM) interactions under a homogeneous magnetic field has been investigated. It is found that average fidelity and critical temperature depend on not only temperature, magnetic field, but also coupling coefficients, and DM interactions. What is more, we also find that average fidelity has little to do with entanglement.

INFLUENCE OF INTRINSIC DECOHERENCE ON THE ENTANGLEMENT BETWEEN TWO ATOMS IN TAVIS–CUMMINGS MODEL

2008 ◽  
Vol 06 (01) ◽  
pp. 167-179
Author(s):  
CHUAN-JIA SHAN ◽  
WEI-WEN CHENG ◽  
TANG-KUN LIU ◽  
YAN-XIA HUANG ◽  
HONG LI ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Quantum State ◽  
Dipole Interaction ◽  
Entangled State ◽  
Entanglement Dynamics ◽  
Initial State ◽  
Intrinsic Decoherence ◽  
Dipole Coupling ◽  
Fock State

Considering the dipole–dipole coupling intensity between two atoms and the field in the Fock state, the entanglement dynamics between two atoms that are initially entangled in the Tavis–Cummings model with intrinsic decoherence have been investigated. The two-atom entanglement appears with periodicity without considering intrinsic decoherence. However, the intrinsic decoherence causes the decay of entanglement between two atoms, with the decrease of the intrinsic decoherence coefficient, the entanglement will quickly become a constant value, which is affected by the two-atom initial state, the dipole–dipole coupling intensity and the field in the Fock state. Meanwhile, the two-atom quantum state will stay forever in the maximal entangled state when the initial state is proper, even in the presence of intrinsic decoherence. Furthermore, the two atoms can generate maximal entangled state even if they are initially separated by adjusting the dipole–dipole interaction, the strong coupling can improve the value of entanglement.

Teleportation of the entangled state of two superconducting qubits

2021 ◽  
Author(s):  
S. Salimian ◽  
Mohammad K. Tavassoly ◽  
N. Sehati
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Coupling Strength ◽  
Success Probability ◽  
Decay Rates ◽  
Ghz State ◽  
Superconducting Qubits ◽  
Entangled State ◽  
Efficient Scheme ◽  
Two Level Systems

Abstract An efficient scheme is proposed to teleport an entangled state of two superconducting (SC) qubits from Alice's to Bob's lab. This type of two-level systems has recently attracted a lot of attention due to the possible tunability of the coupling strength of the qubits with each other. To achieve the purpose, we first generate the GHZ state as the necessary teleportation channel. Then, appropriate interactions are performed in two processes between two of the five qubits, each with a certain frequency modulative external magnetic field which is applied on specific one of the qubits. Next, via applying proper gates and measurements in each lab, we observe that the teleportation can be successfully performed with maximum possible values of fidelity and success probability. At last, to make the protocol close to reality, decay rates of SC qubits are also taken into account, showing that our protocol still works well, satisfactorily.

QUANTUM COMMUNICATION VIA HEISENBERG XYZ SYSTEM

2013 ◽  
Vol 11 (03) ◽  
pp. 1350035 ◽  
Author(s):  
A. EL ALLATI ◽  
Y. HASSOUNI ◽  
N. METWALLY
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Quantum Communication ◽  
Average Fidelity ◽  
The Magnetic Field ◽  
Moriya Interaction ◽  
Degree Of Entanglement

The possibility of generating entangled network via Dzyaloshinskii–Moriya interaction is investigated. The entanglement between the different nodes is quantified. This entangled network is employed to send information between different users who are members on this network. The effect of the field strength and the magnetic field parameters on the degree of entanglement of the network and the average fidelity is discussed. We show that by controlling these parameters one can maximize the average fidelity of the teleported state.

The effects of intra-dimer Dzyaloshinsky–Moriya interaction on the properties of SrCu2(BO3)2in an external magnetic field

2004 ◽  
Vol 16 (11) ◽  
pp. S911-S916 ◽  
Author(s):  
S Miyahara ◽  
F Mila ◽  
K Kodama ◽  
M Takigawa ◽  
M Horvatic ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Moriya Interaction

QUANTUM TELEPORTATION VIA 1D OPTICAL LATTICE CHAINS WITH NONLINEAR COUPLING

2008 ◽  
Vol 06 (06) ◽  
pp. 1213-1222
Author(s):  
JIN-LIANG GUO ◽  
JIE SONG ◽  
HE-SHAN SONG
Keyword(s):  
Magnetic Field ◽  
Optical Lattice ◽  
Quantum Teleportation ◽  
Uniform Magnetic Field ◽  
Communication Protocol ◽  
Nonlinear Coupling ◽  
Classical Communication ◽  
Average Fidelity ◽  
Linear Coupling ◽  
External Uniform Magnetic Field

We study quantum teleportation by using 1D optical lattice for two particles with nonlinear coupling in an external uniform magnetic field as resources via the standard teleportation protocol T0. The effects of linear coupling J, nonlinear coupling K and magnetic field B on the average fidelity are investigated in detail. It is found that increasing |K| is not only very helpful for enhancing the average fidelity, but also beneficial to improving the critical temperature Tf and magnetic field Bf, beyond which quantum teleportation is inferior to classical communication protocol.

Sign in / Sign up

Export Citation Format

Share Document