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Generation of squeezed light with a monolithic optical parametric oscillator: simultaneous achievement of phase matching and cavity resonance by temperature control.
Yonezawa H, Nagashima K, Furusawa A. Yonezawa H, et al. Among authors: furusawa a. Opt Express. 2010 Sep 13;18(19):20143-50. doi: 10.1364/OE.18.020143. Opt Express. 2010. PMID: 20940905
We generate squeezed state of light at 860 nm with a monolithic optical parametric oscillator. The optical parametric oscillator consists of a periodically poled KTiOPO(4) crystal, both ends of which are spherically polished and mirror-coated. ...Our technique makes …
We generate squeezed state of light at 860 nm with a monolithic optical parametric oscillator. The optical parametric oscillator cons …
Experimental creation of a fully inseparable tripartite continuous-variable state.
Aoki T, Takei N, Yonezawa H, Wakui K, Hiraoka T, Furusawa A, van Loock P. Aoki T, et al. Among authors: furusawa a. Phys Rev Lett. 2003 Aug 22;91(8):080404. doi: 10.1103/PhysRevLett.91.080404. Epub 2003 Aug 21. Phys Rev Lett. 2003. PMID: 14525227
A continuous-variable tripartite entangled state is experimentally generated by combining three independent squeezed vacuum states, and the variances of its relative positions and total momentum are measured. ...
A continuous-variable tripartite entangled state is experimentally generated by combining three independent squeezed vacuum states, a
High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables.
Takei N, Yonezawa H, Aoki T, Furusawa A. Takei N, et al. Among authors: furusawa a. Phys Rev Lett. 2005 Jun 10;94(22):220502. doi: 10.1103/PhysRevLett.94.220502. Epub 2005 Jun 8. Phys Rev Lett. 2005. PMID: 16090375
We teleport a coherent state and achieve the fidelity of 0.70 +/- 0.02 that surpasses the no-cloning limit of 2/3. Surpassing the limit is necessary to transfer the nonclassicality of an input quantum state. ...
We teleport a coherent state and achieve the fidelity of 0.70 +/- 0.02 that surpasses the no-cloning limit of 2/3. Surpassing the lim …
Generation of a squeezed vacuum resonant on a rubidium D1 line with periodically poled KTiOPO4.
Tanimura T, Akamatsu D, Yokoi Y, Furusawa A, Kozuma M. Tanimura T, et al. Among authors: furusawa a. Opt Lett. 2006 Aug 1;31(15):2344-6. doi: 10.1364/ol.31.002344. Opt Lett. 2006. PMID: 16832480
We report the generation of a continuous-wave squeezed vacuum resonant on the Rb D1 line (795 nm) using periodically poled KTiOPO4 (PPKTP) crystals. With a frequency doubler and an optical parametric oscillator based on PPKTP crystals, we observed a squeezing …
We report the generation of a continuous-wave squeezed vacuum resonant on the Rb D1 line (795 nm) using periodically poled KTiOPO4 (P …
Experimental demonstration of quantum teleportation of broadband squeezing.
Yonezawa H, Braunstein SL, Furusawa A. Yonezawa H, et al. Among authors: furusawa a. Phys Rev Lett. 2007 Sep 14;99(11):110503. doi: 10.1103/PhysRevLett.99.110503. Epub 2007 Sep 14. Phys Rev Lett. 2007. PMID: 17930422
In particular, we teleport a squeezed state of light and observe -0.8+/-0.2 dB of squeezing in the teleported (output) state. We show that the squeezing criterion translates directly into a sufficient criterion for entanglement of the upper and lower sidebands of th …
In particular, we teleport a squeezed state of light and observe -0.8+/-0.2 dB of squeezing in the teleported (output) state. We show …
Ultraslow propagation of squeezed vacuum pulses with electromagnetically induced transparency.
Akamatsu D, Yokoi Y, Arikawa M, Nagatsuka S, Tanimura T, Furusawa A, Kozuma M. Akamatsu D, et al. Among authors: furusawa a. Phys Rev Lett. 2007 Oct 12;99(15):153602. doi: 10.1103/PhysRevLett.99.153602. Epub 2007 Oct 10. Phys Rev Lett. 2007. PMID: 17995164
Squeezed vacuum pulses (probe lights) were incident on a laser-cooled 87Rb gas together with an intense coherent light (control light). A homodyne method sensitive to the vacuum state was employed for detecting the probe pulse passing through the gas. A delay …
Squeezed vacuum pulses (probe lights) were incident on a laser-cooled 87Rb gas together with an intense coherent light (control light …
Demonstration of a quantum nondemolition sum gate.
Yoshikawa J, Miwa Y, Huck A, Andersen UL, van Loock P, Furusawa A. Yoshikawa J, et al. Among authors: furusawa a. Phys Rev Lett. 2008 Dec 19;101(25):250501. doi: 10.1103/PhysRevLett.101.250501. Epub 2008 Dec 18. Phys Rev Lett. 2008. PMID: 19113685
It represents the natural analogue to a qubit C-NOT gate. In addition, the continuous-variable gate describes a quantum nondemolition (QND) interaction between the quadrature components of two light modes. We experimentally demonstrate a QND sum gate, employi …
It represents the natural analogue to a qubit C-NOT gate. In addition, the continuous-variable gate describes a quantum nondem …
Squeezing at 946nm with periodically poled KTiOPO(4).
Aoki T, Takahashi G, Furusawa A. Aoki T, et al. Among authors: furusawa a. Opt Express. 2006 Jul 24;14(15):6930-5. doi: 10.1364/oe.14.006930. Opt Express. 2006. PMID: 19516876
We report generation of squeezed vacuum in sideband modes of continuous-wave light at 946nm using a periodically poled KTiOPO (4) crystal in an optical parametric oscillator. ...
We report generation of squeezed vacuum in sideband modes of continuous-wave light at 946nm using a periodically poled KTiOPO (4) cry …
Photon subtracted squeezed states generated with periodically poled KTiOPO(4).
Wakui K, Takahashi H, Furusawa A, Sasaki M. Wakui K, et al. Among authors: furusawa a. Opt Express. 2007 Mar 19;15(6):3568-74. doi: 10.1364/oe.15.003568. Opt Express. 2007. PMID: 19532600
We present generation of photon-subtracted squeezed states at 860 nm, from nearly pure, continuous-wave squeezed vacua generated with a periodically-poled KTiOPO(4) crystal as a nonlinear medium of a subthreshold optical parametric oscillator. ...
We present generation of photon-subtracted squeezed states at 860 nm, from nearly pure, continuous-wave squeezed vacua generated with a
Observation of -9 dB quadrature squeezing with improvement of phase stability in homodyne measurement.
Takeno Y, Yukawa M, Yonezawa H, Furusawa A. Takeno Y, et al. Among authors: furusawa a. Opt Express. 2007 Apr 2;15(7):4321-7. doi: 10.1364/oe.15.004321. Opt Express. 2007. PMID: 19532677
We observe -9.01+/-0.14 dB of squeezing and +15.12+/-0.14 dB of antisqueezing with a local oscillator phase locked in homodyne measurement. ...
We observe -9.01+/-0.14 dB of squeezing and +15.12+/-0.14 dB of antisqueezing with a local oscillator phase locked in homodyne measur …
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