9 results about "Coherent control" patented technology

Aspects of the present disclosure describe techniques that involve an active stabilization of coherent controllers using nearby qubits. In an aspect, a quantum information processing (QIP) system for stabilizing phase damping in qubits is described that provides a first and a second qubit ion, measuring magnetic field fluctuations using the second qubit ion, and generates one or more magnetic fields based on the measured magnetic field fluctuations, the one or more magnetic fields being applied near the first qubit ion to cancel the magnetic field fluctuations to stabilize the phase damping of the first qubit ion. Another such QIP system performs provides a first and a second qubit ion, locks a local oscillator to a frequency reference associated with the second qubit ion, and tracks, using the local oscillator, a frequency of the first qubit ion based on the frequency reference. Methods associated with these QIP systems are also described.

The invention belongs to the technical field of electronic countermeasures, and particularly relates to a distributed jammer closed-loop coherent control method based on synthesis effect feedback, which comprises the following steps of: modeling signal coherent synthesis efficiency, acquiring coherent synthesis efficiency of a jammer A and a jammer B under different phase differences under an error-free condition, and calculating the coherent synthesis efficiency of the jammer A and the jammer B; establishing a phase difference-coherent combination efficiency mapping relation reference database; a-B jammer phase correction is carried out; and jammer A-C correction is carried out. According to the method, the robustness and the engineering practicability are remarkably improved; the cost, the power consumption and the complexity are effectively reduced; according to the invention, by taking a synthesis effect as a guide, the harsh requirement on the absolute space-time precision of a single node is relaxed, common commercial devices with lower cost and lower precision are allowed to be used for construction, and meanwhile, the complexity of initial calibration and setting is simplified, so that the hardware cost, power consumption and deployment and maintenance difficulty of the whole distributed mode are greatly reduced; and the dynamic self-correction and long-term stability capabilities are endowed.

This invention discloses a silicon photonic integrated package and method with a room-temperature quantum coherent control structure, comprising: a photoelectric composite interposer layer having vertical photonic vias and electrical vias; four heterogeneous waveguide structures within the photonic vias for vertical optical signal transmission; copper pillars within the electrical vias for electrical interconnection; a first microchannel on the back of the interposer layer; a quantum material heterogeneous integration module bonded to a set of copper pillars, integrating a diamond thin film containing NV color centers, and containing an optical microcavity, photonic crystal waveguide, and microlens; a room-temperature quantum control circuit bonded and interconnected to another set of copper pillars; an optical engine module, located above the control circuit and aligned and coupled to the waveguide interposer layer; and each functional layer integrated and packaged from bottom to top on a carrier board, forming a system-level package with three-dimensional electrical, optical, and thermal interconnection and room-temperature coherent quantum state manipulation capabilities. This invention solves technical challenges such as heterogeneous bonding of silicon photonics and quantum materials, thermal stress mismatch, and photoelectric crosstalk.

The invention relates to a method in which at least one ensemble of atoms is prepared in an output coupling state (Z1) and, by means of coherent control interventions acting on the at least one ensemble of atoms in an atom interferometer input state that is the same as or, after the application of further manipulation steps, different from the output coupling state (Z1), is changed into subsequent states different from the atom interferometer input state, and a matter-wave interferometry sequence, which may in particular have several loops, is carried out with the at least one ensemble of atoms. The invention further relates to an atom interferometer configured for carrying out such a method and to a computer program for carrying out such a method.

Method for stabilizing a non-linear parametric amplifier array comprising N non-linear resonator modes, linear and non-linear couplings between sites, external coherent control fields on each site and input / output ports to send and retrieve an amplified signal; the method comprising: setting the phases of the external coherent control fields to grow linearly with site index, dividing the N sites of the array in 3 regions, setting, in the central region, an homogeneous steady-state solution, assuming periodic boundary conditions, and setting the central quantities to produce directional topological amplification in an homogeneous system; in the left and right buffer regions, imposing to some quantities a smoothly increasing or decreasing profile function from the boundaries to the center; choosing external coherent control frequencies or bare resonator frequencies to locally compensate for the photon number-dependent frequency shifts induced by non-linearities; and solving the exact steady-state mean-field displacements assuming open boundary conditions.

The invention relates to a method for controlling and implementing an atom interferometer, in which at least one ensemble of atoms is prepared in an out-coupling state, wherein the out-coupling state describes the state after cooling procedures and / or other preparation steps or generally the state before the following steps, in which the at least one ensemble of atoms is then transferred to a transfer state different from the out-coupling state by a transfer control intervention, in which the at least one ensemble of atoms is subsequently transferred to an atom interferometer input state by at least one relaunch control intervention, in which a matter-wave interferometry sequence is then carried out with the at least one ensemble of atoms by means of coherent control interventions acting on the at least one ensemble of atoms.The invention also relates to an atom interferometer configured to carry out such a method, and to a computer program for carrying out such a method.

The invention relates to the technical field of molecular measurement, in particular to a molecular dynamics measurement method based on quantum coherence control, which comprises the following steps of: acquiring molecular dynamics transition trajectory and electric dipole moment vector data, calculating and recording a transition direction difference scalar, extracting particle momentum change, executing reverse detection to generate a delay trajectory set, and calculating the molecular dynamics transition trajectory and electric dipole moment vector data; the method comprises the following steps of: extracting an included angle cosine value between an electric dipole moment direction vector group and an atomic centroid spacing vector group in electron excited state transition, analyzing an energy level spectrum band offset screening path number, judging transition direction trend matching to obtain a splicable track, and generating a spectrum band interference verification index group. The method comprises the following steps: extracting an included angle cosine value between an electric dipole moment direction vector group and an atomic centroid spacing vector group in electron excited state transition; based on spectral band dynamic screening of energy level numbers, energy gap difference values and transition step length changes, non-continuous changes in the spectral band energy evolution process can be captured with high sensitivity, and the obtained spectral band interference index has the capability of composite evaluation on energy path continuity and direction change consistency.

Embodiments disclosed herein include a processing tool. In an embodiment, the processing tool comprises a power supply, an impedance matching network coupled to the power supply, a cathode, wherein the power supply is configured to supply power through the impedance matching network to the cathode, and a processing module, wherein the processing module is communicatively coupled to the power supply and the impedance matching network.

Embodiments disclosed herein include a processing tool, in one embodiment, the processing tool includes a power source, an impedance matching network coupled to the power source, a cathode, where the power source is configured to provide power to the cathode through the impedance matching network, and a processing module communicatively coupled to the power source and the impedance matching network.