Towards the fiber-optic Kennedy quantum receiver by Elezov Mikhail, Scherbatenko Mikhail, Sych Denis, Goltsman Gregory

“…Our receiver allows to discriminate two phase-modulated coherent states of light at a wavelength of 1.5 microns in continuous mode with bit rate 200 Kbit/s and error rate about two times below the standard quantum limit.…”
Get full text

Measuring carbon nanotube vibrations using a single-electron transistor as a fast linear amplifier by Wen, Y, Ares, N, Pei, T, Briggs, G, Laird, E

“…The sensitivity of this continuous displacement measurement approaches within a factor 470 of the standard quantum limit.…”

Cavity-enabled spin squeezing for a quantum-enhanced atomic clock by Schleier-Smith, Monika Helene

Get full text

Classical and Quantum Cosmological Solutions in Teleparallel Dark Energy with Anisotropic Background Geometry by Andronikos Paliathanasis

“…The latter are used for the derivation of new analytic solutions for the classical field equations and exact function forms for the wavefunction in the quantum limit.…”
Get full text

Optical backaction-evading measurement of a mechanical oscillator by Itay Shomroni, Liu Qiu, Daniel Malz, Andreas Nunnenkamp, Tobias J. Kippenberg

“…Measurements of motion that avoid quantum backaction, with the potential to surpass the standard quantum limit, have so far been demonstrated using microwave radiation. …”
Get full text

Quantum Receiver for Phase-Shift Keying at the Single-Photon Level by Jasminder S. Sidhu, Shuro Izumi, Jonas S. Neergaard-Nielsen, Cosmo Lupo, Ulrik L. Andersen

“…Our receiver surpasses the standard quantum limit and outperforms all previously known nonadaptive detectors at low input powers. …”
Get full text

Improved photon-number squeezing in light-emitting diodes by Wolfl, F, Schucan, G, Fox, A, Ryan, J

“…The overall current-to-current efficiency was 0.25 at room temperature and 0.40 at 77 K, resulting in a noise reduction below the Standard Quantum Limit of 1.1 dB and 2.0 dB, respectively. In addition, photocurrent correlation experiments were carried out with 2 or 3 LEDs in series, revealing a normalized correlation coefficient of 0.25 at room temperature and 0.40 at 77 K.…”

Miniband transport and stark-cyclotron-resonance in InAs/GaSb superlattices by Hales, V, Nicholas, R, Mason, N

“…At higher biases the superlattice exhibits a large magneto-resistance and in the quantum limit we observe conduction peaks, which satisfy the Stark-Cyclotron-Resonance condition. …”

SQUEEZED-LIGHT GENERATION IN SEMICONDUCTORS by Fox, A, Baumberg, J, Dabbicco, M, Huttner, B, Ryan, J

“…The measured noise is suppressed below the quantum limit over the entire range of our detection bandwidth (30-50 MHz). …”

Achieving the ultimate optical resolution by Sánchez-Soto Luis L., Hradil Zdeněk, Řeháček Jaroslav, Brecht Benjamin, Silberhorn Christine

“…We show new quantum-inspired schemes able to estimate that separation at the quantum limit. The method works in the spatial, temporal, and frequency domains. …”
Get full text

Transverse Peierls Transition by Kaifa Luo, Xi Dai

“…We propose that two of the topological semimetal systems in the quantum limit, where the electrons only occupy the lowest Landau bands under external magnetic field, will be the perfect systems to realize these new phases. …”
Get full text

Detection of relativistic fermions in Weyl semimetal TaAs by magnetostriction measurements by T. Cichorek, Ł. Bochenek, J. Juraszek, Yu. V. Sharlai, G. P. Mikitik

“…In this manuscript, the authors show that magnetostriction offers clearly distinguishable conventional and Weyl or Dirac charge carrier contributions when the latter are in their quantum limit.…”
Get full text

Resonant Optomechanics with a vibrating carbon nanotube and a radio-frequency cavity by Ares, N, Laird, E, Briggs, G, Warner, J, Pei, T, Mavalankar, A, Mergenthaler, M

“…We measure the mechanical ring down and show that further improvements to the system could enable the measurement of mechanical motion at the quantum limit.…”

Quantum Optics with Quantum Gases by Mekhov, I, Ritsch, H

“…Only very recently this ultimate quantum limit of light-matter interaction became feasible experimentally. …”

Optimal quantum phase estimation. by Dorner, U, Demkowicz-Dobrzanski, R, Smith, B, Lundeen, J, Wasilewski, W, Banaszek, K, Walmsley, I

“…Although this boundary is generally worse than the Heisenberg limit, we show that the obtained precision beats the standard quantum limit, thus leading to a significant improvement compared to classical interferometers. …”

Influence of scattering processes on electron quantum states in nanowires by Pozdnyakov Dmitry, Galenchik Vadim, Borzdov Andrei, Borzdov Vladimir, Komarov Fadei

“…<p>Abstract</p><p>In the framework of quantum perturbation theory the self-consistent method of calculation of electron scattering rates in nanowires with the one-dimensional electron gas in the quantum limit is worked out. The developed method allows both the collisional broadening and the quantum correlations between scattering events to be taken into account. …”
Get full text

Quantum-enhanced differential atom interferometers and clocks with spin-squeezing swapping by Robin Corgier, Marco Malitesta, Augusto Smerzi, Luca Pezzè

“…Currently, differential protocols with uncorrelated particles and mode-separable settings reach a sensitivity bounded by the standard quantum limit (SQL). Here we show that differential interferometry can be understood as a distributed multiparameter estimation problem and can benefit from both mode and particle entanglement. …”
Get full text

Searches for Massive Neutrinos with Mechanical Quantum Sensors by Daniel Carney, Kyle G. Leach, David C. Moore

“…We present the concept that a single nanometer-scale optically levitated sensor operated with sensitivity near the standard quantum limit can search for heavy sterile neutrinos in the keV-MeV mass range with sensitivity significantly beyond existing laboratory constraints. …”
Get full text

Quantum Hall superconductivity from moiré Landau levels by Gaurav Chaudhary, A. H. MacDonald, M. R. Norman

“…Here, we argue that twisted bilayer graphene at a magic angle (MATBG) is an ideal system in which to search for this phenomenon because its Landau levels are doubly degenerate and its superconductivity appears already at carrier densities small enough to allow the quantum limit to be reached at relatively modest magnetic fields. …”
Get full text

Quantum bistability in the hyperfine ground state of atoms by B. Gábor, D. Nagy, A. Vukics, P. Domokos

“…Thereby we propose a readily feasible experimental scheme to study the dissipative phase transition phenomenology in the quantum limit, allowing for, in particular, performing a finite-size scaling to the thermodynamic limit.…”
Get full text