Quantum Manipulation Using Light-Atom Interaction
... The obtainable spin squeezing improves with the quality of the resonator and the number of atoms. Fig. 4 shows the calculated spin squeezing for a typical atom number (N=2×104) and varying finesse of the resonator. Note that we obtain excellent agreement between the calculation [23] and the experime ...
... The obtainable spin squeezing improves with the quality of the resonator and the number of atoms. Fig. 4 shows the calculated spin squeezing for a typical atom number (N=2×104) and varying finesse of the resonator. Note that we obtain excellent agreement between the calculation [23] and the experime ...
Quantum cryptography
... – “Send and measure” with some classical communication resources – Final steps consist of a “classical” error correction and privacy amplification • To detect the effects of Eve, Alice selects a random subset of the qubits to be announced as test bits. Alice and Bob compare these bits to learn the e ...
... – “Send and measure” with some classical communication resources – Final steps consist of a “classical” error correction and privacy amplification • To detect the effects of Eve, Alice selects a random subset of the qubits to be announced as test bits. Alice and Bob compare these bits to learn the e ...
L. Bell*, et. al., "THz emission by Quantum Beating in a Modulation
... = ! -4 "1/4u0e−u0, where u0 = 2eE / )hm$20, $0 is the classical frequency of the oscillator and we have taken mh = me for simplicity. For weak fields the oscillating dipole moment is thus proportional to electric field. A numerical simulation of our quantum well yields z31 / z21 * 0.5E / !1 kV/ cm". ...
... = ! -4 "1/4u0e−u0, where u0 = 2eE / )hm$20, $0 is the classical frequency of the oscillator and we have taken mh = me for simplicity. For weak fields the oscillating dipole moment is thus proportional to electric field. A numerical simulation of our quantum well yields z31 / z21 * 0.5E / !1 kV/ cm". ...
Document
... Femtosecond photons: space-time “localized” modes One-photon interference: Modes must have good classical overlap ...
... Femtosecond photons: space-time “localized” modes One-photon interference: Modes must have good classical overlap ...
Quantum Nonequilibrium Dynamics: Transport, Entanglement, and Thermalization
... On the other hand, the equilibrium statistical mechanics has achieved enormous success in explaining various phenomena in the physical world although the absolutely perfect equilibrium has never happened in anywhere. Therefore, it is important to understand to what extent and under what circumstance ...
... On the other hand, the equilibrium statistical mechanics has achieved enormous success in explaining various phenomena in the physical world although the absolutely perfect equilibrium has never happened in anywhere. Therefore, it is important to understand to what extent and under what circumstance ...
Abstract: - QCCQI 2008
... magnetized tip attached to the freely vibrating end of the resonator that causes oscillating Zeeman shifts of the spin states. Under realistic conditions the shift corresponding to a single quantum of motion can approach 100 kHz and exceed both the electronic spin coherence time ($T_2 \sim 1$ ms) a ...
... magnetized tip attached to the freely vibrating end of the resonator that causes oscillating Zeeman shifts of the spin states. Under realistic conditions the shift corresponding to a single quantum of motion can approach 100 kHz and exceed both the electronic spin coherence time ($T_2 \sim 1$ ms) a ...
I am grateful to Mike Weismann for guiding much of this discussion
... necessitate a probabilistic treatment, so that the ψ-function is interpreted (through |ψ|2) as representing spatial probabilities (19). In the extrapolation to time-dependent systems, the quantized states are ‘borrowed’ from the description of the transition, conservation of momentum is handled thro ...
... necessitate a probabilistic treatment, so that the ψ-function is interpreted (through |ψ|2) as representing spatial probabilities (19). In the extrapolation to time-dependent systems, the quantized states are ‘borrowed’ from the description of the transition, conservation of momentum is handled thro ...
QUANTUM FIELD THEORY ON CURVED
... Lemma 1.4. The Laplacian determines the metric, i.e. if two Riemannian metrics have the same Laplacian, then they are equal. Corollary 1.5 (naturality ⇔ isometry). For F : M → N a diffeomorphism, F ∗ ◦ ∆N = ∆M ◦ F ∗ if and only if F is an isometry. The property F ∗ ◦ ∆N = ∆M ◦ F ∗ is called naturali ...
... Lemma 1.4. The Laplacian determines the metric, i.e. if two Riemannian metrics have the same Laplacian, then they are equal. Corollary 1.5 (naturality ⇔ isometry). For F : M → N a diffeomorphism, F ∗ ◦ ∆N = ∆M ◦ F ∗ if and only if F is an isometry. The property F ∗ ◦ ∆N = ∆M ◦ F ∗ is called naturali ...
Density Functional Theory for Systems with Electronic Edges
... The second of the two Hohenberg–Kohn theorems provide a variational principle for the energy functional, using the density as the variational quantity instead of the wave function. However, a subtle problem enters. Assume the density functions n(r) and ñ(r) are different. If we let n be the exact d ...
... The second of the two Hohenberg–Kohn theorems provide a variational principle for the energy functional, using the density as the variational quantity instead of the wave function. However, a subtle problem enters. Assume the density functions n(r) and ñ(r) are different. If we let n be the exact d ...
Two-dimensional quantum gravity may be formulated as a
... This is enough for all eigenfunctions of the Hamiltonian H (29) and for the re solvent (x 111(z + H)I y) to vanish at x,. In other words, there is no tunneling through the poles and the eigenstates stay localized between two successive poles [x" x,J or between the first pole x, and +=. This leads v ...
... This is enough for all eigenfunctions of the Hamiltonian H (29) and for the re solvent (x 111(z + H)I y) to vanish at x,. In other words, there is no tunneling through the poles and the eigenstates stay localized between two successive poles [x" x,J or between the first pole x, and +=. This leads v ...
PDF
... times, taking nearly 1 µs). By monitoring a cavity for the fluorescence from this cycling transition, we can reliably detect whether or not a 795 nm photon has been absorbed by the atom in that cavity. If neither atom or if only one atom has absorbed such a photon, then we cycle both atoms back to th ...
... times, taking nearly 1 µs). By monitoring a cavity for the fluorescence from this cycling transition, we can reliably detect whether or not a 795 nm photon has been absorbed by the atom in that cavity. If neither atom or if only one atom has absorbed such a photon, then we cycle both atoms back to th ...
Phys. Rev. Lett
... jHi j0il or jVi j0il were used as input in the QP. We analyzed the output state through a double-fork hologram and a circular-polarization analysis setup along the two diffracted modes: the intensity of the R (L ) polarization component in the mode corresponding to l ¼ þ2 (l ¼ 2) was measured t ...
... jHi j0il or jVi j0il were used as input in the QP. We analyzed the output state through a double-fork hologram and a circular-polarization analysis setup along the two diffracted modes: the intensity of the R (L ) polarization component in the mode corresponding to l ¼ þ2 (l ¼ 2) was measured t ...