A promising approach to overcome decoherence in quantum computing schemes is to perform active quantum error correction using topology. Topological subsystem codes incorporate both the benefits of topological and subsystem codes, allowing for error syndrome recovery with only 2-local measurements in…

[Phys. Rev. A 85, 050302] Published Mon May 14, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.050302

physics review

We study low-energy scattering of a neutral atom by a perfectly conducting cylindrical nanowire. Based on the exact atom-wire potential given recently by Eberlein and Zietal [ Phys. Rev. A 80 012504 (2009)] we derive tractable expressions for both the nonretarded van der Waals limit and the highly …

[Phys. Rev. A 85, 040702] Published Fri Apr 27, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.040702

physics review

We consider a strongly repulsive fermionic gas in a two-dimensional optical lattice confined by a harmonic trapping potential. To address the strongly repulsive regime, we consider the t-J Hamiltonian. The presence of the harmonic trapping potential enables the stabilization of coexisting and compet…

[Phys. Rev. A 85, 051603] Published Mon May 14, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.051603

physics review

We investigate experimentally parity-time (PT) symmetric scattering using LRC circuits in an inductively coupled PT-symmetric pair connected to transmission line leads. In the single-lead case, the PT-symmetric circuit acts as a simple dual device?an amplifier or an absorber depending on the orienta…

[Phys. Rev. A 85, 050101] Published Fri May 04, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.050101

physics review

We address the phase of a highly polarized Fermi gases across a narrow Feshbach resonance starting from the problem of a single down-spin fermion immersed in a Fermi sea of up spins. Both polaron and pairing states are considered using the variational wave function approach, and we find that the pol…

[Phys. Rev. A 85, 041603] Published Fri Apr 13, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.041603

physics review

We investigate the photon-induced tunneling phenomena in a photonic crystal cavity containing a strongly coupled quantum dot and describe how this tunneling can be used to generate photon states consisting mainly of a particular Fock state. Additionally, we study experimentally the second-order auto…

[Phys. Rev. A 85, 041801] Published Thu Apr 12, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.041801

physics review

The thermodynamic properties of the unitary Fermi gas (UFG) have recently been measured to unprecedented accuracy at the MIT. In particular, these measurements provide an improved understanding of the regime below T/?_F?0.20, where a transition into a superfluid phase occurs. In light of this develop…

[Phys. Rev. A 85, 051601] Published Tue May 01, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.051601

physics review

We investigate the photon-induced tunneling phenomena in a photonic crystal cavity containing a strongly coupled quantum dot and describe how this tunneling can be used to generate photon states consisting mainly of a particular Fock state. Additionally, we study experimentally the second-order auto…

[Phys. Rev. A 85, 041801] Published Thu Apr 12, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.041801

physics review

The propagation of ultrashort optical pulses in an AlGaAs waveguide array is studied using frequency-resolved optical gating measurements. In the nonlinear regime, the measurements show that the pulses at the output of the array evolve toward a set chirp value that is independent of the input chirp….

[Phys. Rev. A 85, 031806] Published Fri Mar 30, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.031806

physics review

We formulate the concept of dominant interaction Hamiltonians to obtain an integrable approximation to the dynamics of an electron exposed to a strong laser field and an atomic potential leading to high-order-harmonic generation. The concept relies on local information in phase space to switch betwe…

[Phys. Rev. A 85, 041401] Published Thu Apr 12, 2012

Source: http://link.aps.org/doi/10.1103/PhysRevA.85.041401

physics review