| Records |
| Author |
Ожегов, Роман Викторович |
| Title |
Флуктуационная чувствительность и стабильность приемников с СИС и HEB смесителями для терагерцового тепловидения |
Type |
Journal Article |
| Year |
2011 |
Publication |
Радиофизика |
Abbreviated Journal |
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| Volume |
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Pages |
135 |
| Keywords |
HEB |
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no |
| Call Number |
RPLAB @ gujma @ |
Serial |
731 |
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| Author |
Курочкин, Юрий Владимирович |
| Title |
Методы повышения пропускной способности квантовой криптографии |
Type |
Manuscript |
| Year |
2011 |
Publication |
МФТИ |
Abbreviated Journal |
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Pages |
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| Keywords |
quantum cryptography |
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Ph.D. thesis |
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no |
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762 |
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| Author |
Ikuta, Rikizo; Kusaka, Yoshiaki; Kitano, suyoshi; Kato, Hiroshi; Yamamoto, Takashi; Koashi, Masato; Imoto, Nobuyuki |
| Title |
Wide-band quantum interface for visible-totelecommunication wavelength conversion |
Type |
Journal Article |
| Year |
2011 |
Publication |
Nature Communications |
Abbreviated Journal |
Nat. Comm. |
| Volume |
2 |
Issue |
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Pages |
5 |
| Keywords |
fromIPMRAS |
| Abstract |
Although near-infrared photons in telecommunication bands are required for long-distance quantum communication, various quantum information tasks have been performed by using visible photons for the past two decades. Recently, such visible photons from diverse media including atomic quantum memories have also been studied. Optical frequency down-conversion from visible to telecommunication bands while keeping the quantum states is thus required for bridging such wavelength gaps. Here we report demonstration of a quantum interface of frequency down-conversion from visible to telecommunication bands by using a nonlinear crystal, which has a potential to work over wide bandwidths, leading to a high-speed interface of frequency conversion. We achieved the conversion of a picosecond visible photon at 780 nm to a 1,522-nm photon, and observed that the conversion process retained entanglement between the down-converted photon and another photon. |
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no |
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RPLAB @ gujma @ |
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764 |
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| Author |
Kono, Junichiro |
| Title |
Coherent terahertz control |
Type |
Journal Article |
| Year |
2011 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
| Volume |
5 |
Issue |
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Pages |
5-6 |
| Keywords |
fromIPMRAS |
| Abstract |
Spin and charge terahertz excitations in solids are promising for implementing future technologies such as spintronics and quantum computation, but coherently controlling them has been a significant challenge. Researchers have now manipulated coherent spin waves in an antiferromagnet using the intense magnetic field of ultrashort terahertz pulses. |
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no |
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RPLAB @ gujma @ |
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773 |
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| Author |
Paiella, Roberto |
| Title |
Terahertz quantum cascade lasers: Going ultrafast |
Type |
Journal Article |
| Year |
2011 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
| Volume |
5 |
Issue |
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Pages |
253–255 |
| Keywords |
fromIPMRAS |
| Abstract |
A new asynchronous coherent optical sampling method allows for the direct visualization of actively mode-locked quantum cascade laser pulses at terahertz wavelengths. |
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no |
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RPLAB @ gujma @ |
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774 |
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| Author |
Barreiro, Julio T. |
| Title |
Quantum physics: Environmental effects controlled |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
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Pages |
927–928 |
| Keywords |
fromIPMRAS |
| Abstract |
An open quantum system loses its 'quantumness' when information about the state leaks into its surroundings. Researchers now show how this decoherence can be controlled between two incompatible regimes in the case of a single photon. |
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no |
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RPLAB @ gujma @ |
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817 |
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| Author |
Hannay, Timo |
| Title |
A new kind of science? |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
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Pages |
742 |
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fromIPMRAS |
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no |
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RPLAB @ gujma @ |
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818 |
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| Author |
Vishveshwara, Smitha |
| Title |
Topological qubits: A bit of both |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
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Pages |
450–451 |
| Keywords |
fromIPMRAS |
| Abstract |
'Standard' qubits have been implemented in diverse physical systems. Now, so-called topological qubits are coming into the limelight, and could potentially be used for decoherence-free quantum computing. Coupling these two types of qubit might enable devices that exploit the virtues of both. |
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no |
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RPLAB @ gujma @ |
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825 |
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| Author |
Biercuk, Michael J. |
| Title |
A quantum spectrum analyser |
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Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
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Pages |
525–526 |
| Keywords |
fromIPMRAS |
| Abstract |
Noise filters based on so-called dynamical decoupling pulse sequences can suppress decoherence in quantum systems. Turning this idea on its head now provides a new technique for studying the noise itself. |
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no |
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RPLAB @ gujma @ |
Serial |
826 |
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| Author |
Kumar, Sushil; Wang I. Chan, Chun; Hu, Qing; Reno, John L. |
| Title |
A 1.8-THz quantum cascade laser operating significantly above the temperature of ω/kB |
Type |
Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
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| Keywords |
fromIPMRAS |
| Abstract |
Several competing technologies continue to advance the field of terahertz science; of particular importance has been the development of a terahertz semiconductor quantum cascade laser (QCL), which is arguably the only solid-state terahertz source with average optical power levels of much greater than a milliwatt. Terahertz QCLs are required to be cryogenically cooled and improvement of their temperature performance is the single most important research goal in the field. Thus far, their maximum operating temperature has been empirically limited to ~ω/kB, a largely inexplicable trend that has bred speculation that a room-temperature terahertz QCL may not be possible in materials used at present. Here, we argue that this behaviour is an indirect consequence of the resonant-tunnelling injection mechanism employed in all previously reported terahertz QCLs. We demonstrate a new scattering-assisted injection scheme to surpass this limit for a 1.8-THz QCL that operates up to ~1.9ω/kB (163 K). Peak optical power in excess of 2 mW was detected from the laser at 155 K. This development should make QCL technology attractive for applications below 2 THz, and initiate new design strategies for realizing a room-temperature terahertz semiconductor laser. |
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no |
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RPLAB @ gujma @ |
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836 |
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