Browsing by Author "Mitchell, Morgan W."
Now showing items 1-17 of 17
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Autoheterodyne characterization of narrow-band photon pairs
Prakash, Vindhiya; Sierant, Aleksandra; Mitchell, Morgan W. (American Institute of Physics (AIP), 2021-07-19)
Article
Open AccessWe describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when nondegenerate photon pairs interfere at a beam splitter. The technique implements a temporal analog of the ... -
Bose-Einstein condensate comagnetometer
Mazzinghi, Chiara; Gómez Kabelka, Pau; Martin, Ferran; Benedicto Orenes, Daniel; Palacios, Silvana; Mitchell, Morgan W. (American Institute of Physics (AIP), 2020-04-29)
Article
Open AccessWe describe a comagnetometer employing the f ¼ 1 and f ¼ 2 ground state hyperfine manifolds of a 87Rb spinor Bose-Einstein condensate as colocated magnetometers. The hyperfine manifolds feature nearly opposite gyromagnetic ... -
Cavity-enhanced polarization rotation measurements for low-disturbance probing of atoms
Mazzinghi, Chiara; Benedicto Orenes, Daniel; Gómez Kabelka, Pau; Lucivero, Vito Giovanni; Aybar, Enes; Gugnani, Stuti; Mitchell, Morgan W. (2021-12-06)
Article
Open AccessWe propose and demonstrate cavity-enhanced polarization-rotation measurement as a means to detect magnetic effects in transparent media with greater sensitivity at equal optical disturbance to the medium. Using the Jones ... -
Fast optical source for quantum key distribution based on semiconductor optical amplifiers
Jofre Cruanyes, Marc; Gardelein, Arnaud; Anzolin, Gabriele; Amaya, Waldimar; Capmany, Jose; Ursin, Rupert; Peñate, Laura; López, D.; San Juan, J. L.; Carrasco, J. A.; Garcia, F.; Torcal-Milla, F. J.; Sanchez-Brea, L. M.; Bernabeu, E.; Perdigues Armengol, Josep Maria; Jennewein, Thomas; Torres, Juan P.; Mitchell, Morgan W.; Pruneri, Valerio (2011)
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Open AccessA novel integrated optical source capable of emitting faint pulses with different polarization states and with different intensity levels at 100 MHz has been developed. The source relies on a single laser diode followed ... -
Interferometric measurement of interhyperfine scattering lengths in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Rb</mml:mi><mml:mprescripts /><mml:none /><mml:mn>87</mml:mn></mml:mmultiscripts></mml:math>
Mazzinghi, Chiara; Gómez Kabelka, Pau; Martin, Ferran; Coop, Simon; Palacios, Silvana; Mitchell, Morgan W. (American Physical Society (APS), 2019-09-10)
Article
Open AccessWe present interferometeric measurements of the f = 1 to f = 2 interhyperfine scattering lengths in a single-domain spinor Bose-Einstein condensate of 87Rb. The interhyperfine interaction leads to a strong and state-dependent ... -
Long-term laser frequency stabilization using fiber interferometers
Kong, Jia; Lucivero, Vito Giovanni; Jiménez-Martínez, Ricardo; Mitchell, Morgan W. (AIP, 2015-07-09)
Article
Open AccessWe report long-term laser frequency stabilization using only the target laser and a pair of 5 m fiber interferometers, one as a frequency reference and the second as a sensitive thermometer to stabilize the frequency ... -
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres
Hensen, B.; Bernien, H.; Dréau, A. E.; Reiserer, A.; Kalb, N.; Blok, M. S.; Ruitenberg, J.; Vermeulen, R. F. L.; Schouten, R. N.; Abellán, Carlos, 1990-; Amaya, W.; Pruneri, P.; Mitchell, Morgan W.; Markham, M.; Twitchen, D. J.; Elkouss, D.; Wehner, S.; Taminiau, Tim Hugo; Hanson, R. (Nature Publishing Group, 2015-10-21)
Article
Restricted access - publisher's policyMore than 50 years ago1, John Bell proved that no theory of nature that obeys locality and realism2 can reproduce all the predictions of quantum theory: in any local-realist theory, the correlations between outcomes of ... -
Macroscopic Quantum State Analyzed Particle by Particle
Beduini, Federica A.; Zielińska, Joanna Ada; Lucivero, Vito G.; Icaza Astiz, Yannick A. de; Mitchell, Morgan W. (ACS Publications, 2015-03-27)
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Open AccessMacroscopic quantum phenomena, e.g., superconductivity and squeezing, are believed to result from entanglement of macroscopic numbers of particles. We report the first direct study of this kind of entanglement: we use ... -
Manipulating and measuring single atoms in the Maltese cross geometry
Bianchet, Lorena Cecilia; Natalia, Alves; Zarraoa Sardón, Laura; Bruno, Natalia; Mitchell, Morgan W. (2021-09-06)
Article
Open AccessBackground: Optical microtraps at the focus of high numerical aperture (high-NA) imaging systems enable efficient collection, trapping, detection and manipulation of individual neutral atoms for quantum technology and ... -
Passive Decoy-State Quantum Key Distribution with Coherent Light
Curty, Marcos; Jofre Cruanyes, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
Article
Open AccessSignal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ... -
Passive decoy-state quantum key distribution with coherent light
Curty, M.; Jofre Cruanyes, Marc; Pruneri, Valerio; Mitchell, Morgan W. (2015-06-12)
Article
Open AccessSignal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ... -
Phase-stable source of polarization-entangled photons in a linear double-pass configuration
Steinlechner, F.; Ramelow, Sven; Jofre, Martí; Gilaberte, Marta; Jennewein, Thomas; Pérez Torres, Juan; Mitchell, Morgan W.; Pruneri, Valerio (2013-05)
Article
Open AccessWe demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel ‘folded sandwich’ configuration. Bi-directionally pumping a single ... -
Quantum atom-light interfaces in the Gaussian description for spin-1 systems
Colangelo, Giorgio; Sewell, Robert J.; Behbood, Naeimeh; Ciurana, Ferran Martin; Triginer Cahelles, Joaquim; Mitchell, Morgan W. (2013-10)
Article
Open AccessWe extend the covariance matrix description of atom–light quantum interfaces, originally developed for real and effective spin-1/2 atoms, to include ‘spin alignment’ degrees of freedom. This allows accurate modelling ... -
Signal tracking beyond the time resolution of an atomic sensor by Kalman filtering
Jimenez Martinez, Ricardo; Kolodynski, Jan; Troullinou, Charikleia; Lucivero, Vito Giovanni; Jong, Kia; Mitchell, Morgan W. (American Institute of Physics (AIP), 2018-01-26)
Article
Open AccessWe study causal waveform estimation (tracking) of time-varying signals in a paradigmatic atomic sensor, an alkali vapor monitored by Faraday rotation probing. We use Kalman filtering, which optimally tracks known linear ... -
Single-domain Bose condensate magnetometer achieves energy resolution per bandwidth below h
Coop, Simon; Palacios, Silvana; Gómez Kabelka, Pau; Zamora Zamora, Roberto; Mazzinghi, Chiara; Mitchell, Morgan W. (2022-02-08)
Article
Open AccessWe present a magnetic sensor with energy resolution per bandwidth ER < h. We show how a 87Rb single-domain spinor Bose– Einstein condensate, detected by nondestructive Faraday rotation probing, achieves single-shot ... -
Strong experimental guarantees in ultrafast quantum random number generation
Mitchell, Morgan W.; Abellán, Carlos, 1990-; Amaya, Waldimar (American Physical Society, 2015-01-12)
Article
Open AccessWe describe a methodology and standard of proof for experimental claims of quantum random-number generation (QRNG), analogous to well-established methods from precision measurement. For appropriately constructed physical ... -
Ultra-fast quantum randomness generation by accelerated phase diffusion in a pulsed laser diode
Abellán Cano, Carlos; Amaya, Waldimar; Jofre Cruanyes, Marc; Curty, M.; Acín dal Maschio, Antonio; Capmany, Jose; Pruneri, Valerio; Mitchell, Morgan W. (2014-01-27)
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Open AccessWe demonstrate a high bit-rate quantum random number generator by interferometric detection of phase diffusion in a gain-switched DFB laser diode. Gain switching at few-GHz frequencies produces a train of bright pulses ...