Topological protection versus degree of entanglement of two-photon light

2021 ◽  
Author(s):  
Konrad Tschernig ◽  
Kurt Busch ◽  
Armando Perez-Leija
Keyword(s):  
Two Photon ◽  
Degree Of Entanglement

High degree of entanglement and nonlocality of a two-photon state generated at 532 nm

2011 ◽  
Vol 199 (1) ◽  
pp. 111-125 ◽  
Author(s):  
F. Sciarrino ◽  
G. Vallone ◽  
G. Milani ◽  
A. Avella ◽  
J. Galinis ◽  
...  
Keyword(s):  
Photon State ◽  
Two Photon ◽  
High Degree ◽  
532 Nm ◽  
Degree Of Entanglement

scholarly journals INFLUENCE OF DIPOLE-DIPOLE INTERACTION ON DYNAMICS OF ENTANGLED GREENBERGER — HORNE — ZEILINGER STATES FOR TWO QUBITS

2017 ◽  
Vol 19 (9.1) ◽  
pp. 112-121
Author(s):  
E.K. Bashkirov ◽  
T.A. Puzyrnaya
Keyword(s):  
Sudden Death ◽  
Maximum Degree ◽  
Dipole Interaction ◽  
Entanglement Sudden Death ◽  
Ghz States ◽  
Two Photon ◽  
Degree Of Entanglement

The influence of dipole-dipole interaction on dynamics of three- and four-particle GHZ states for two Д-type superconducting flux cubits interacting with one or two different electronic LC cavities via two-photon processes has been investigated. The results show that dipole-dipole interaction does not lead to the disappearance of the effect of entanglement sudden death and does not change the maximum degree of entanglement.

Topological protection versus degree of entanglement of two-photon edge states

2021 ◽  
Author(s):  
Konrad Tschernig ◽  
Kurt Busch ◽  
Armando Perez-Leija
Keyword(s):  
Edge States ◽  
Two Photon ◽  
Degree Of Entanglement

Features of three-photon polarization states: Entanglement and polarization

2014 ◽  
Vol 12 (07n08) ◽  
pp. 1560009 ◽  
Author(s):  
M. V. Fedorov
Keyword(s):  
Photon Polarization ◽  
Two Photon ◽  
Arbitrary Complex ◽  
Stokes Vectors ◽  
Polarization States ◽  
Photon States ◽  
Complex Coefficients ◽  
Degree Of Entanglement

In a general form, three-photon polarization states are superpositions of contributions from four three-photon polarization modes with four arbitrary complex coefficients. Entanglement of such states is defined as entanglement between their one-photon and two-photon parts. The degree of entanglement is found explicitly in terms of such entanglement quantifiers as the generalized concurrence, entropy of reduced states and the Schmidt parameter. Polarization Stokes vectors, as well as the Schmidt decompositions of three-photon states are found and discussed. Similarity and differences with respect to biphoton polarization states are discussed too.

scholarly journals Generation of Two-Photon States with an Arbitrary Degree of Entanglement Via Nonlinear Crystal Superlattices

2006 ◽  
Vol 97 (22) ◽  
Author(s):  
Alfred B. U’Ren ◽  
Reinhard K. Erdmann ◽  
Manuel de la Cruz-Gutierrez ◽  
Ian A. Walmsley
Keyword(s):  
Nonlinear Crystal ◽  
Arbitrary Degree ◽  
Two Photon ◽  
Photon States ◽  
Degree Of Entanglement

Generation of (2 × 2) and (4 × 4) two-photon states with tunable degree of entanglement and mixedness

2004 ◽  
Vol 52 (11-12) ◽  
pp. 1102-1109 ◽  
Author(s):  
M. Barbieri ◽  
C. Cinelli ◽  
F. De Martini ◽  
P. Mataloni
Keyword(s):  
Two Photon ◽  
Photon States ◽  
Degree Of Entanglement

Two-photon excitation microscopy in cellular biophysics

1995 ◽  
Vol 53 ◽  
pp. 62-63
Author(s):  
David W. Piston ◽  
Brian D. Bennett ◽  
Robert G. Summers
Keyword(s):  
Confocal Microscopy ◽  
Laser Beam ◽  
Duty Cycle ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

Two-photon excitation fluorescence microscopy in living systems

1993 ◽  
Vol 51 ◽  
pp. 154-155 ◽  
Author(s):  
David W. Piston
Keyword(s):  
Confocal Microscopy ◽  
Fluorescence Microscopy ◽  
Singlet State ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation fluorescence microscopy provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In our fluorescence experiments, the final excited state is the same singlet state that is populated during a conventional fluorescence experiment. Thus, the fluorophore exhibits the same emission properties (e.g. wavelength shifts, environmental sensitivity) used in typical biological microscopy studies. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10−5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

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