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Spectral Functions and rf Response of Ultracold Fermionic Atoms

- R. Haussmann, M. Punk, W. Zwerger
- Physics
- 8 April 2009

We present a calculation of the spectral functions and the associated rf response of ultracold fermionic atoms near a Feshbach resonance. The single particle spectra are peaked at energies that can… Expand

Polaron-to-molecule transition in a strongly imbalanced Fermi gas

- M. Punk, P. Dumitrescu, W. Zwerger
- Physics
- 10 August 2009

A single down spin Fermion with an attractive, zero range interaction with a Fermi sea of up-spin Fermions forms a polaronic quasiparticle. The associated quasipart icle weight vanishes beyond a… Expand

Relaxation of antiferromagnetic order in spin-1/2 chains following a quantum quench.

- P. Barmettler, M. Punk, V. Gritsev, E. Demler, E. Altman
- PhysicsPhysical review letters
- 27 October 2008

TLDR

Quantum dimer model for the pseudogap metal

- M. Punk, A. Allais, S. Sachdev
- PhysicsProceedings of the National Academy of Sciences
- 5 January 2015

TLDR

Topological excitations and the dynamic structure factor of spin liquids on the kagome lattice

- M. Punk, D. Chowdhury, S. Sachdev
- Physics
- 9 August 2013

A quantum spin liquid is a spin state with no magnetic order even at the lowest temperatures. To explain neutron scattering data on a ‘kagome lattice’ antiferromagnet, visons (elementary excitations… Expand

Quantum quenches in the anisotropic spin-\frac{1}{2} Heisenberg chain: different approaches to many-body dynamics far from equilibrium

- P. Barmettler, M. Punk, V. Gritsev, E. Demler, E. Altman
- Physics
- 10 November 2009

Recent experimental achievements in controlling ultracold gases in optical lattices open a new perspective on quantum many-body physics. In these experimental setups, it is possible to study coherent… Expand

Theory of rf-spectroscopy of strongly interacting fermions.

- M. Punk, W. Zwerger
- PhysicsPhysical review letters
- 5 July 2007

We show that strong pairing correlations in Fermi gases lead to the appearance of a gaplike structure in the rf spectrum, both in the balanced superfluid and in the normal phase above the… Expand

Fermi surface reconstruction in hole-doped t-J models without long-range antiferromagnetic order.

- M. Punk, S. Sachdev
- Physics, Materials Science
- 17 February 2012

We calculate the Fermi surface of electrons in hole-doped, extended t-J models on a square lattice in a regime where no long-range antiferromagnetic order is present, and no symmetries are broken.… Expand

Transport near the Ising-nematic quantum critical point of metals in two dimensions

- S. Hartnoll, R. Mahajan, M. Punk, S. Sachdev
- Physics
- 27 January 2014

We consider two-dimensional metals near a Pomeranchuk instability which breaks ${90}^{\ensuremath{\circ}}$ lattice rotation symmetry. Such metals realize strongly coupled non-Fermi liquids with… Expand

Collective mode damping and viscosity in a 1D unitary Fermi gas

- M. Punk, W. Zwerger
- Physics
- 16 May 2006

We calculate the damping of the Bogoliubov–Anderson mode in a one-dimensional (1D) two-component attractive Fermi gas for arbitrary coupling strength within a quantum hydrodynamic approach. Using the… Expand

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