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JP5622578B2 |
According to one embodiment, a quantum information system includes a source of time dependent entangled photons and an indicating unit. The indicating unit indicates the entangled state of the entangled photons based on the emission time...
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JP5602238B2 |
A photon source comprising: a quantum dot; electrical contacts configured to apply an electric field across said quantum dot: and an electrical source coupled to said contacts, said electrical source being configured to apply a potential...
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JP5547285B2 |
An optical logic circuit employing quantum dots affords a circuit that is not oversized in scale, and makes it possible to efficiently conduct logic operations. An optical logic circuit is equipped with: a quantum dot layer part (10) for...
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JP5526200B2 |
A quantum memory component including a quantum dot molecule having first and second quantum dots provided in respective first and second layers separated by a barrier layer; an exciton comprising an electron and hole bound state in said ...
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JP2014089480A |
To solve the problem that there is no way to recognize future information in the past, by a quantum theory so as to cope with a sudden disaster or emergency with time to spare since future information is indicated from future in advance....
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JP5426597B2 |
A component comprising a qubit and a controller for said qubit, said component comprising a quantum dot and an excitation portion configured to produce a neutral exciton state in said quantum dot to form said qubit, the component further...
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JP5404801B2 |
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JP2014016636A |
To provide an all-optical AND gate.An all-optical AND gate is a nonlinear element having an optical resonator and is configured to receive first and second amplitude-modulated optical input signals with individual data having binary logi...
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JP5398511B2 |
Techniques are generally disclosed for optical devices that may be used to implement a variety of logic devices or other circuits by optical means. Example optical devices use a photodiode to alter the charge carrier concentration in a w...
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JP2014006548A |
To provide a method for manufacturing an optical circuit.A method for manufacturing an optical circuit includes: a) a step of selecting a logic operation executed by an optical circuit; b) a step of designing the optical circuit by one o...
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JP2013254201A |
To provide a system and method for quantum teleportation of a quantum state of an input photon.The system includes: a light emitting diode 1 to produce a polarization-entangled photon pair; a beam splitter to direct one photon of the ent...
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JP5367663B2 |
To provide a waveform of an optical pulse most suitable for execution of population transfer based on STIRAP. According to one embodiment of the invention, a quantum information processing method and apparatus transfers a state of a phys...
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JP5367666B2 |
An operating method for stimulated Raman adiabatic passage to change probability amplitude in a three-level system including states of |0>, |1> and |e>, includes the following two steps. One is to direct a first laser beam and a second l...
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JP5354233B2 |
This computation device and method exponentially shortens a computation time of an NP-complete problem or the like mapped into an Ising model by exponentially shortening a computation time of the Ising mode. For each pair of a plurality ...
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JP5354861B2 |
A quantum computer includes: N (where N is an integer of at least 2) physical systems having five states |0>, |1>, |2>, |3> and |4> in which transitions between three lower states |0>, |1> and |2> and two upper states |3> and |4> are opt...
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JP5347363B2 |
In the WDM optical transmission system, when performing a correction of a control target value of the total light intensity per one channel of the WDM light in each node on a transmission path, a correction value calculation section of e...
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JP5326102B2 |
To solve the following problem: (1) it is difficult to obtain a stable operation condition and (2) it is difficult to reduce size of a bistable element, especially a semiconductor bisable laser. The bistable element is characterized in t...
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JP5318380B2 |
To provide an optical parallel arithmetic element for performing more high-performance parallel operation at a higher speed. In this optical parallel arithmetic element, a plurality of optical cells are provided adjacent to each other. I...
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JP5314815B2 |
When in an optical signal amplifying triode 10, light of a second wavelength lambda 2, selected from among light from a first optical amplifier 26, into which a first input light L1 of a first wavelength lambda 1 and a second input light...
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JP5318381B2 |
To provide an optical parallel arithmetic element for performing complicated operation such as information processing by learning at a higher speed. In this optical parallel arithmetic element, a plurality of optical cells 11 are provide...
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JP5268316B2 |
An optical resonator includes a master resonator configured to resonate an electromagnetic wave, one structure or a pair of structures adjacent to each other, each of which is arranged at a position that overlaps one of resonance modes o...
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JP5250033B2 |
An optical logic device has a first mirror confronting a second mirror, and a saturable absorber located between the mirrors. Radiation that is output from the device is output via the first mirror. The reflectivity of the first mirror i...
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JP5244283B2 |
A segmented radial spatial light modulator has an active optic area comprising a plurality of radially extending active optic modulators disposed at various angular orientations with respect to a central axis. The segmented radial spatia...
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JP5234890B2 |
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JP5212411B2 |
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JP2013509600A |
A system and method is provided for a source for a heralded single photon comprising a correlated photon-pair generator that provides bursts of multiple photon pairs that may be odd or even in number of pairs, one of each pair having a f...
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JP5142908B2 |
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JP5144471B2 |
To provide an optical correlator which can carry out correlation detection of high accuracy without requiring relative position relation of highly precise optical systems. The optical correlator 1 is a Vander-Lugt type which detects corr...
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JP5119492B2 |
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JP5108051B2 |
To provide a device and method of generating quantum bits, capable of more easily generating a cluster state than in the conventional manner. The device of generating the quantum bits 600 includes: first and second lasers 601 and 602 to ...
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JP5110422B2 |
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JP5091813B2 |
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...
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JP5091717B2 |
A quantum bit computation method includes operating a two-quantum-bit gate on quantum bits of a first physical system and a second physical system, second energy states of second physical systems except for the first physical system and ...
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JP5078035B2 |
A sender (1) adds decoy photons to a secret photon having confidential information, then, subjects each photon to a different rotational manipulation, and passes the photons along a quantum channel (3) (S11 and S12). A receiver (2) recei...
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JP5068162B2 |
Systems and methods convert or transfer quantum information from one photonic representation or state to another. This permits conversion of quantum information from one encoding to another and to representations that are convenient, eff...
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JP5065320B2 |
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JP5014937B2 |
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JP4998974B2 |
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JP4996290B2 |
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JP4996407B2 |
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> an...
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JP4982652B2 |
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JP4964055B2 |
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JP4939341B2 |
In a conventional optical signal processing device, a confocal optical system is configured in which a focusing lens is positioned at a substantially-intermediate point of a free space optical path. Thus, the free space optical system ha...
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JP4904199B2 |
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JP4904220B2 |
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JP4904200B2 |
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JP4892669B2 |
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JP4892560B2 |
A system, method, and apparatus for photon logic gates based on quantum switch, where a single or multiple quantum switches are utilized for dark resonance interactions in which three-color lasers interact with a four-level or five-level...
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JP4883305B2 |
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JP4871994B2 |
A nanoparticle is able to emit single photons. A waveguide is coupled to the nanoparticle and able to receive the single photons. A backreflector is optically coupled to the waveguide and configured to reflect the single photons toward t...
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