44 results about "Resonator mode" patented technology

A method includes causing a common-resonator mode resonating with a transition between |2>i and |3>i that are coupled to each other by a transition having a homogenous broadening ΔEhomo greater than an energy difference between |0>i and |1>i, an energy difference between |2>i and |3>i being greater than ΔEhomo, transferring states of m quantum bits represented by |0>k and |1>k to |4>k and |5>k, respectively, when a quantum-bit-gate operation using the common-resonator mode is executed between the quantum bits represented by m physical systems k, |E(|u>k)−E(|v>k)|>ΔEhomo, u, vε{2, 3, 4, 5}, u≠v, executing adiabatic passage between the physical systems k, using light that resonates with a transition between |3>k and |4>k and a transition between |3>k and |5>k, executing the quantum-bit-gate operation between the quantum bits, and transferring, to |0>k and |1>k, the states represented by |4>k and |5>k, respectively.

Quantum information processing device includes resonator incorporating material containing physical systems, each of physical systems having at least four energy states, transition between two energy states of at least four energy states, and transition energy between at least two energy states of at least four energy states, at least four energy states being non-degenerate when magnetic field fails to be applied to physical systems, transition resonating in resonator mode that is in common between physical systems, each of at least four energy states representing a quantum bit, transition energy being shifted when magnetic field is applied to physical systems, and magnetic-field application unit configured to apply magnetic field having direction and intensity to material, to eliminate linear transition energy shift between two energy states included in physical systems, each of two energy states included in physical systems being with excluding two energy states resonating in resonator mode.

Quantum computer includes optical resonator including system group containing systems each having energy states highest-energy state |3>, and other two energy states |1> and |2>, fourth or more states |p>, transition angular frequency (ωij) between |i> and |j>, homogeneous broadening (Δωhomo,ij) in transition angular frequency between |i> and |j>, optical resonator having resonator modes, ωck of kth resonator mode, and emitting unit configured to emit light beam to system group, and wherein |ωcl−ωcm|>Δωhomo,23, system group includes system subgroups Aq having respective ω23 which resonate with respective ωcq of resonator modes, and emitting unit is arranged to apply light beam of two wavelengths and other light beam to s(1)th quantum bit Aqs(1) (s(1)1˜r) formed of r systems selected from each Aq, light beam of two wavelengths simultaneously causing two-photon resonance on Aq at ω12 or ω1p, other light beam simultaneously causing one-photon resonance on Aq at ω13 or ωp3.

A method and a system method for generating optical multipartite quantum states, comprising generating optical fields by at least two different spontaneous four-wave mixing processes and overlapping the optical fields spontaneously generated from the different spontaneous four-wave mixing processes into a same resonator mode of a third-order nonlinear resonator. The system comprises a multi-colored laser source exiting a nonlinear third-order resonator at different resonance frequencies belonging to different mode families of the resonator.

A photon pair generating device capable of further increasing generation efficiency of a correlation photon pair is provided, the photon pair generating device generating the correlation photon pair by a hyper-parametric scattering. A quantum well is provided in a resonator. An incident light radiated from a light source to the resonator resonates therein and becomes a particular resonator mode. The generation efficiency of the correlation photon pair by the hyper-parametric scattering in the quantum well is enhanced by disposing the quantum well in a position where electric field strength of the light becomes higher by this resonator mode.

An apparatus includes a material in a resonator and containing systems, each of the systems having five energy states, a unit generating first and second pulse that resonate in a second transition and a third transition, respectively, a unit controlling the first and second pulse to make the first and second pulse temporally overlap each other to obtain third light, a unit emitting the third light to each system, a unit generating observation light to be coupled to the resonator mode, a unit introducing the observation light to the resonator from an outside thereof, a unit reading one of quantum bits by measuring an intensity of one of reflected light and transmitted light of the observation light, a unit controlling the first and second pulse to make the first and second pulse temporally overlap each other to obtain fourth light, and a unit emitting the fourth light to each system.

A method of generating a single photon, includes preparing an optical resonator including a resonator mode of a resonance angular frequency ωc, preparing a material contained in the optical resonator, including a low energy state |g> and a high energy state |e>, and including a transition angular frequency ωa between |g>−|e> that is varied by an external field, applying, to the material, light of an angular frequency ωl different from the resonance angular frequency ωc, and applying a first external field to the material to vary the transition angular frequency ωa to resonate with the angular frequency ωl, such that a state of the material is changed to |e>, and then applying a second external field to the material to vary the transition angular frequency ωa to resonate with the resonance angular frequency ωc, such that the state of the material is restored to |g>.

The invention discloses a prism type detection system for loss and gain ratios between resonator modes and a detection method. The detection system comprises a prism type laser connected with a resonator mode state servo controller. Outgoing laser beams are projected to a double-light window photoelectric detector through a coupling output lens, the double-light window photoelectric detector is arranged on an open servo base which is respectively connected with an oscilloscope and a computer, and the open servo base is also connected with the resonator mode state servo controller. The method includes the steps that 1) the outgoing laser beams of the prism type laser are projected to the double-light window photoelectric detector; 2) the servo base exerts mechanical dithering; 3) dithering optical signals of the double-light window photoelectric detector are modulated and read through the oscilloscope; 4) the position, where the prism type laser outputs light, relative to the double-light window photoelectric detector is adjusted until two paths of signal amplitudes are the same; 5) the double-light window photoelectric detector collects light intensity signals, and the light intensity signals are input into the servo base; 6) the result is transmitted to the computer. The system is simple in visualization operation, convenient and fast to process and accurate in detection result.

A laser amplifier system is provided which comprises a resonator with optical resonator elements which determine a course of a resonator radiation field which propagates along an optical axis and at least one laser-active medium (LM). The resonator is designed as a split resonator and has a first resonator section which extends from a first virtual plane of separation and a second resonator section which extends from a second virtual plane of separation. The resonator sections are dimensioned optically such that the resonator radiation field has radiation field states corresponding to the same resonator modes in each of the virtual planes of separation. An amplifying unit optically independent of the resonator is arranged between the first and the second virtual planes of separation. The amplifying unit comprises the at least one laser-active medium and couples the radiation field states in a neutral manner with respect to the resonator modes.

A dielectric resonator antenna having a dielectric substrate with a ground plane and a dielectric resonator element arranged on the ground plane includes a conductive feeding assembly operable to excite one or more dielectric resonator modes of the dielectric resonator element for generation of a first circularly polarized electromagnetic field, and a radiating arrangement operable to produce a second circularly polarized electromagnetic field complementary to the first circularly polarized electromagnetic field. The first and second circularly polarized electromagnetic fields, when combined, are arranged to provide a unilateral circularly polarized electromagnetic field.