41results about How to "Increase entanglement" patented technology

A novel method and apparatus for long distance quantum communication in realistic, lossy photonic channels is disclosed. The method uses single emitters of light as intermediate nodes in the channel. One electronic spin and one nuclear spin coupled via the contact hyperfine interaction in each emitter, provide quantum memory and enable active error purification. It is shown that the fixed, minimal physical resources associated with these two degrees of freedom suffice to correct arbitrary errors, making our protocol robust to all realistic sources of decoherence. The method is particularly well suited for implementation using recently-developed solid-state nano-photonic devices.

The invention relates to a high-permeability mask nonwoven fabric, which is utilized as a base material of products, such as masks, has high-efficiency skin-closed permeability and toughness, is soft and delicate and has higher hydrophilia, and a manufacturing method of the high-permeability mask nonwoven fabric. The high-permeability mask nonwoven fabric is manufactured by the following steps of by utilizing cellulosic fiber with the length of 5-25mm as a raw material, through a high-pressure pre-spunlace head of a forming machine, carrying out pre-spunlace winding on a fiber web on a formed web, carrying out main spunlace reinforcing and winding, drying and coiling.

The invention discloses a processing method for a multilayer composite sized down feather flocculus, and the method comprises the following steps of: mixing cotton, namely mixing 10-70wt% of down feather fiber with 90-30wt% of low-melting-point fiber by virtue of a mixer so as to respectively obtain a high-down-feather-content mixture and a low-down-feather-content mixture; and opening, carding, lapping, carrying out acupuncture reinforcing, and carrying out hot melting, bonding and reinforcing. An acupuncture reinforcing manner is adopted, so that the bulking intensity of a fiber mesh is effectively controlled, and entanglement between fibers is enhanced, thus the down feather is effectively controlled, and play of flying feather and the down feather is reduced; and multi-consolidation is carried out by adopting a method that acupuncture is firstly carried out and then hot melting is carried out, so that control over the down feather is effectively improved, and the stability of the down feather flocculus is improved.

The invention relates to non-woven product manufacturing equipment, in particular to a component of a needle machine, and discloses an automatic-rotating felting needle. The automatic-rotating felting needle comprises a needle body (1) and a needle rod (2). Hooks (3) are arranged on the needle body (1) at intervals. The needle body (1) and the needle rod (2) are arranged separately. A blind hole (4) is formed at one end of a non-bent handle of the needle rod (2), and the needle body (1) is inserted into the blind hole (4) to rotate relative to the blind hole. The felting needle rotates when penetrating fiber nets, so that twining force and cohesive force among fibers are greatly increased, the fibers are twined firmly and are not easy to layer due to high releasing force, length of a production line is shortened, production efficiency is improved, and service life of the felting needle is prolonged.

The invention relates to a generating device for continuous variable quantum entanglement between a quantum channel and a quantum node. The generating device mainly solves the technical problem of probability preparation of the entanglement between the quantum channel and the quantum node at present. According to the technical scheme provided by the invention, the generating device comprises a light source unit, an acousto-optic modulation system, an optical parameter amplifier, an optical beam splitter, an atom system and an entanglement measuring system, wherein the light source unit is provided with a seed optical signal aS1 and aS2 output end, a control optical signal aC output end and a local oscillation optical signal aL1 and aL2 output end; the seed optical signals aS1 and aS2 are connected with a first input end of the atom system through the acousto-optic modulation system, the optical parameter amplifier and the optical beam splitter; the control optical signal aC is connected with a second input end of the atom system through the acousto-optic modulation system; the atom system is connected with the first input end of the entanglement measuring system; a second output end of the optical beam splitter is connected with the second input end of the entanglement measuring system; the local oscillation optical signals aL1 and aL2 are connected with the third and fourth input ends of the entanglement measuring system.

The invention discloses a construction method of a stable subcode of a Japanese-shaped structure based on cluster states. The construction method adopted is to select two qubits whose cluster states are located on the diagonal of the Japanese-shaped lattice for X flipping. Compared with The significant improvement of the graph-state chain construction method is that two more Z-flips can be constructed on the middle edge of the two X-flips, so the encoding utilization of qubits is significantly improved. The method of constructing stable subcodes proposed by the present invention has good scalability and can be freely extended to larger cluster states. Selecting the same construction method can construct a family of stabilizers with the same characteristics; this construction method Not only can it be applied to cluster state structures, but it can also be generalized in other two-dimensional planar polygonal structures to construct quantum error-correcting codes under different symmetries.