Now showing items 42023-42042 of 57118

    • Quantum Electrodynamics in 2+1 Dimensions With Quenched Disorder: Quantum Critical States With Interactions and Disorder 

      Thomson, Alex; Sachdev, Subir (American Physical Society (APS), 2017-06-26)
      Quantum electrodynamics in 2+1 dimensions (QED3) is a strongly coupled conformal field theory (CFT) of a U(1) gauge field coupled to 2N two-component massless fermions. The N=2 CFT has been proposed as a ground state of ...
    • Quantum electrodynamics of accelerated atoms in free space and in cavities 

      Belyanin, Alexey; Kocharovsky, Vitaly V.; Capasso, Federico; Fry, Edward; Zubairy, M. Suhail; Scully, Marlan O. (American Physical Society, 2006)
      We consider a gedanken experiment with a beam of atoms in their ground state that are accelerated through a single-mode cavity. We show that taking into account of the "counterrotating" terms in the interaction Hamiltonian ...
    • Quantum Electronic Transport in Mesoscopic Graphene Devices 

      Allen, Monica Theresa (2016-05-14)
      Graphene provides a rich platform for the study of interaction-induced broken symmetry states due to the presence of spin and sublattice symmetries that can be controllably broken with external electric and magnetic fields. ...
    • Quantum Engineering with Mechanical Strain 

      Maity, Smarak (2021-07-12)
      Qubits (quantum bits) have many different physical realizations, each with their own strengths and weaknesses. Futuristic quantum networks will require carefully designed interactions between different types of qubits, ...
    • Quantum enhanced metrology in the optical lattice clock 

      Shu, Chi (2023-03-14)
      High-bandwidth, high-stability clocks offer unique chances to study fundamental physics beyond simple metrology. Today, the most stable clocks are optical lattice clocks and they can reach a fractional stability of 3.1 × ...
    • Quantum entanglement and dynamics of low-dimensional quantum many-body systems 

      Fan, Ruihua (2023-05-12)
      Entanglement as a fundamental aspect of quantum mechanics plays a crucial role in many-body systems. Quantum dynamics, due to the intricate interplay between the locality of the interaction and the non-local nature of ...
    • Quantum entanglement between an optical photon and a solid-state spin qubit 

      Togan, E; Chu, Y.; Trifonov, Alexei; Jiang, L.; Maze, J.; Childress, Lilian I.; Dutt, M; Sørensen, A. S.; Hemmer, Philip; Zibrov, Alexander S; Lukin, Mikhail D. (Nature Publishing Group, 2010)
      Quantum entanglement is among the most fascinating aspects of quantum theory1. Entangled optical photons are now widely used for fundamental tests of quantum mechanics2 and applications such as quantum cryptography1. Several ...
    • Quantum Error Correction for Metrology 

      Kessler, Eric; Lovchinsky, Igor; Sushkov, Alexander; Lukin, Mikhail D. (American Physical Society (APS), 2014)
      We propose and analyze a new approach based on quantum error correction (QEC) to improve quantum metrology in the presence of noise. We identify the conditions under which QEC allows one to improve the signal-to-noise ratio ...
    • Quantum fluctuations in the presence of thin metallic films and anisotropic materials 

      Iannuzzi, Davide; Lisanti, Mariangela; Munday, Jeremy N.; Capasso, Federico (IOP Publishing, 2006)
    • Quantum Fluids of Self-Assembled Chains of Polar Molecules 

      Wang, Daw-Wei; Lukin, Mikhail D.; Demler, Eugene A. (American Physical Society (APS), 2006)
      We study polar molecules in a stack of strongly confined pancake traps. When dipole moments point perpendicular to the planes of the traps and are sufficiently strong, the system is stable against collapse but attractive ...
    • Quantum Flutter: Signatures and Robustness 

      Knap, Michael; Mathy, Charles J. M.; Ganahl, Martin; Zvonarev, Mikhail; Demler, Eugene A. (American Physical Society (APS), 2014)
      We investigate the motion of an impurity particle injected with finite velocity into an interacting one-dimensional quantum gas. Using large-scale numerical simulations based on matrix product states, we observe and ...
    • Quantum foam and topological strings 

      Iqbal, Amer; Vafa, Cumrun; Nekrasov, Nikita; Okounkov, Andrei (Springer Verlag, 2008)
    • A Quantum Gas Microscope for Detecting Single Atoms in a Hubbard-Regime Optical Lattice 

      Bakr, Waseem Sulaiman; Gillen, Jonathon; Peng, Amy Wan-Chih; Fölling, Simon; Greiner, Markus (Nature Publishing Group, 2009)
      Recent years have seen tremendous progress in creating complex atomic many-body quantum systems. One approach is to use macroscopic, effectively thermodynamic ensembles of ultracold atoms to create quantum gases and strongly ...
    • Quantum Gas Microscopy of Strongly Correlated Bosons 

      Kim, Sooshin (2023-05-09)
      A system of ultracold atoms in an optical lattice provides a powerful platform for quantum simulation. In our laboratory, we use a quantum gas microscope to tune lattice parameters not only in a global scale but also at ...
    • Quantum geometry of refined topological strings 

      Aganagic, Mina; Cheng, Miranda C. N.; Dijkgraaf, Robbert; Krefl, Daniel; Vafa, Cumrun (Springer Verlag, 2012)
      We consider branes in refined topological strings. We argue that their wavefunctions satisfy a Schrodinger equation depending on multiple times and prow this in the case where the topological string has a dual matrix model ...
    • Quantum Hall Conductance of Two-Terminal Graphene Devices 

      Williams, James R.; Abanin, Dmitry A.; DiCarlo, Leonardo; Levitov, Leonid S.; Marcus, Charles Masamed (American Physical Society, 2009)
      Measurement and theory of the two-terminal conductance of monolayer and bilayer graphene in the quantum Hall regime are compared. We examine features of conductance as a function of gate voltage that allow monolayer, ...
    • Quantum Hall drag of exciton condensate in graphene 

      Liu, Xiaomeng; Watanabe, Kenji; Taniguchi, Takashi; Halperin, Bertrand I.; Kim, Philip (Springer Nature, 2017)
      Exciton condensate is a Bose-Einstein condensate (BEC) of electron and hole pairs bound by the Coulomb interaction1,2. In an electronic double layer (EDL) under strong magnetic fields, filled Landau states in one layer ...
    • Quantum Hall Effect, Screening, and Layer-Polarized Insulating States in Twisted Bilayer Graphene 

      Sanchez-Yamagishi, Javier D.; Taychatanapat, Thiti; Watanabe, Kenji; Taniguchi, Takashi; Yacoby, Amir; Jarillo-Herrero, Pablo (American Physical Society (APS), 2012)
      We investigate electronic transport in dual-gated twisted-bilayer graphene. Despite the subnanometer proximity between the layers, we identify independent contributions to the magnetoresistance from the graphene Landau ...
    • Quantum Hall to Insulator Transition in the Bilayer Quantum Hall Ferromagnet 

      Murthy, Ganpathy; Sachdev, Subir (American Physical Society, 2008)
      We describe a phase transition of the bilayer quantum Hall ferromagnet at \(\nu=1\). In the presence of static disorder (modeled by a periodic potential), bosonic \(S=\frac{1}{2}\) spinons undergo a superfluid-insulator ...
    • Quantum heat waves in a one-dimensional condensate 

      Agarwal, Kartiek; Dalla Torre, Emanuele G.; Schmiedmayer, Jörg; Demler, Eugene (American Physical Society, 2017)
      We study the dynamics of phase relaxation between a pair of one-dimensional condensates created by a bi-directional, supersonic 'unzipping' of a finite single condensate. We find that the system fractures into different ...