Document
... • Since the Hilbert space of the photonic degree of freedom is large, we can expect to transmit more than one bit per photon • For actual PDC sources, the mutual information per photon pair is determined by the length of the crystal Lz and the spot size of the pump w0 ...
... • Since the Hilbert space of the photonic degree of freedom is large, we can expect to transmit more than one bit per photon • For actual PDC sources, the mutual information per photon pair is determined by the length of the crystal Lz and the spot size of the pump w0 ...
Reducing multi-photon rates in pulsed down
... naturally entangled in energy and momentum, demanding special techniques to tailor their joint correlations and avoid heralding single-photons into mixed states [17, 18, 19, 20]. Second, since the process is spontaneous, there is a probability of emitting more than a single photon into the same spat ...
... naturally entangled in energy and momentum, demanding special techniques to tailor their joint correlations and avoid heralding single-photons into mixed states [17, 18, 19, 20]. Second, since the process is spontaneous, there is a probability of emitting more than a single photon into the same spat ...
KNUST1 - Indico
... • “… an essential feature of [this] type of theory … is the prediction of incomplete multiplets of vector and scalar bosons” • Englert, Brout, Guralnik, Hagen & Kibble did not comment on its existence • Discussed in detail by Higgs in 1966 paper ...
... • “… an essential feature of [this] type of theory … is the prediction of incomplete multiplets of vector and scalar bosons” • Englert, Brout, Guralnik, Hagen & Kibble did not comment on its existence • Discussed in detail by Higgs in 1966 paper ...
is it possible to know about something without ever interacting with it?
... procedure an exact position of the object inside the interferometer, we can test (locally) that all but that region inside the intefferometer is empty. The information about the existence of the object was obtained without "touching" it. Indeed, we had a single photon. Had it been scattered or absor ...
... procedure an exact position of the object inside the interferometer, we can test (locally) that all but that region inside the intefferometer is empty. The information about the existence of the object was obtained without "touching" it. Indeed, we had a single photon. Had it been scattered or absor ...
www.osa-opn.org 36 | OPN Optics & Photonics News Illustration by Phil Saunders/ spacechannel.org
... parametric down conversion (TOSPDC). In the TOSPDC process, single pump photons are annihilated, giving rise to the emission of photon triplets. This process can be based on the same third-order nonlinearity in optical fibers that makes the SFWM process possible. However, the very large spectral sep ...
... parametric down conversion (TOSPDC). In the TOSPDC process, single pump photons are annihilated, giving rise to the emission of photon triplets. This process can be based on the same third-order nonlinearity in optical fibers that makes the SFWM process possible. However, the very large spectral sep ...
Four-photon orbital angular momentum entanglement
... Twin photons that are created by SPDC are correlated in several degrees of freedom and exhibit quantum entanglement. Apart from the well-known polarization degrees, the photons can also be correlated in their spatial degrees; this manifests itself in continuous wavevector or (the Fourier-related) po ...
... Twin photons that are created by SPDC are correlated in several degrees of freedom and exhibit quantum entanglement. Apart from the well-known polarization degrees, the photons can also be correlated in their spatial degrees; this manifests itself in continuous wavevector or (the Fourier-related) po ...
P ho ton-num ber-resolving detection using time
... that event. A similar problem affects most photomultipliers and APDs operated in the gain mode [8], where the excess noise of the gain mechanism makes discrimination of multi-photon detection events practically impossible. Photomultiplier tubes, however, have been used in the past to obtain informat ...
... that event. A similar problem affects most photomultipliers and APDs operated in the gain mode [8], where the excess noise of the gain mechanism makes discrimination of multi-photon detection events practically impossible. Photomultiplier tubes, however, have been used in the past to obtain informat ...
The Higgs Boson - University of Toronto Physics
... and he may very well be right. It cer tainly holds for a proposed but un discovered particle called the Higgs boson and the so-called Higgs field as sociated with it. The Higgs boson, which is named after Peter W. Higgs of the University of Edinburgh, is the chief missing in gredient in what is ...
... and he may very well be right. It cer tainly holds for a proposed but un discovered particle called the Higgs boson and the so-called Higgs field as sociated with it. The Higgs boson, which is named after Peter W. Higgs of the University of Edinburgh, is the chief missing in gredient in what is ...
Quantum Beat of Two Single Photons
... The mutual coherence time of the interfering photons is obtained from the damping of the quantum beat or, alternatively, from the width of the two-photon interference dip. In both cases, a coherence time of 460 ns (half width at 1=e dip depth) is observed, which exceeds the 64 ns decay time of the c ...
... The mutual coherence time of the interfering photons is obtained from the damping of the quantum beat or, alternatively, from the width of the two-photon interference dip. In both cases, a coherence time of 460 ns (half width at 1=e dip depth) is observed, which exceeds the 64 ns decay time of the c ...
Photon-number state on-demand source by cavity parametric
... Photon-number states are required in many optical applications of quantum information and quantum computing. Single-photon states are necessary for security-proven quantum cryptography,1 and other Fock states with fixed number of photons can be used to generate multiparticle entanglement.2 Furthermo ...
... Photon-number states are required in many optical applications of quantum information and quantum computing. Single-photon states are necessary for security-proven quantum cryptography,1 and other Fock states with fixed number of photons can be used to generate multiparticle entanglement.2 Furthermo ...
The Computational Complexity of Linear Optics
... sent through a linear-optical network, then nonadaptively measured to count the number of photons in each mode. This model is not known or believed to be universal for quantum computation, and indeed, we discuss the prospects for realizing the model using current technology. On the other hand, we pr ...
... sent through a linear-optical network, then nonadaptively measured to count the number of photons in each mode. This model is not known or believed to be universal for quantum computation, and indeed, we discuss the prospects for realizing the model using current technology. On the other hand, we pr ...
Quantum Circuits. Intro to Deutsch. Slides in PPT.
... f constant all amplitude in 0 . Research problem: What f balanced all amplitude in 1 . ...
... f constant all amplitude in 0 . Research problem: What f balanced all amplitude in 1 . ...
Proposal to produce two and four qubits with spatial modes of two
... of polarization-entangled photon pairs,” Phys. Rev. Lett. 75, 4337–4341 (1995). 3. P.G. Kwiat, E. Waks, A.G. White, I. Appelbaum, and P.H. Eberhard, “Ultrabright source of polarizationentangled photons.” Phys. Rev. A 60, 773–777 (1999). 4. A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglemen ...
... of polarization-entangled photon pairs,” Phys. Rev. Lett. 75, 4337–4341 (1995). 3. P.G. Kwiat, E. Waks, A.G. White, I. Appelbaum, and P.H. Eberhard, “Ultrabright source of polarizationentangled photons.” Phys. Rev. A 60, 773–777 (1999). 4. A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, “Entanglemen ...
arXiv:1504.04012v1 [cond-mat.quant
... This gives a quantum dimension of m/2 for the defects ending the BEC trenches. However, if the vacuum regions (Fig. 2) are sufficiently large, single-boson tunneling is suppressed, and one recovers the degeneracy in Eq. (9). We also briefly remark that the long-range fluctuations of the BEC can be c ...
... This gives a quantum dimension of m/2 for the defects ending the BEC trenches. However, if the vacuum regions (Fig. 2) are sufficiently large, single-boson tunneling is suppressed, and one recovers the degeneracy in Eq. (9). We also briefly remark that the long-range fluctuations of the BEC can be c ...
q-Deformed bosonic Newton oscillators: Algebra and
... Newton oscillators (Algin and Arslan, 2008). Starting with a q-deformed Bose-Einstein distribution function, several low-temperature thermodynamical functions via the grand partition function of the system are calculated. Due to some algebraic reasons originating from (7), (8), (12), and (14), we ob ...
... Newton oscillators (Algin and Arslan, 2008). Starting with a q-deformed Bose-Einstein distribution function, several low-temperature thermodynamical functions via the grand partition function of the system are calculated. Due to some algebraic reasons originating from (7), (8), (12), and (14), we ob ...
Testing Heisenberg`s Uncertainty Principle with
... |V +i [1]. Heisenberg’s uncertainty principle states that two observables of a particle cannot be measured accurately at the same time. The principle is often illustrated by the two observables momentum and position, and says that by improving the accuracy of a measurement of the momentum, one need ...
... |V +i [1]. Heisenberg’s uncertainty principle states that two observables of a particle cannot be measured accurately at the same time. The principle is often illustrated by the two observables momentum and position, and says that by improving the accuracy of a measurement of the momentum, one need ...
Lecture 22/23 1 Quantum Mechanics
... or 3 qubits, and is the identity on all the other qubits. Why do we need to assume this? Because physical interactions are local. To work with this constraint, we want a universal set of quantum gates that we can use to build more complex circuits, just like AND, OR, and NOT in classical computers. ...
... or 3 qubits, and is the identity on all the other qubits. Why do we need to assume this? Because physical interactions are local. To work with this constraint, we want a universal set of quantum gates that we can use to build more complex circuits, just like AND, OR, and NOT in classical computers. ...
Polarizability and Collective Excitations in Semiconductor Quantum
... and DMC. Note the large discrepancy in the values obtained with the ...
... and DMC. Note the large discrepancy in the values obtained with the ...
Experimental demonstration of quantum correlations over more than
... time jitter is about 450 ps FWHM and permits one to differentiate between photons having traveled along different interferometer arms. The signals from the p-i-n photodiodes trigger a time to pulse height converter ~TPHC! ~EG&G Ortec 457!, which is placed next to the source in Geneva. A window discr ...
... time jitter is about 450 ps FWHM and permits one to differentiate between photons having traveled along different interferometer arms. The signals from the p-i-n photodiodes trigger a time to pulse height converter ~TPHC! ~EG&G Ortec 457!, which is placed next to the source in Geneva. A window discr ...