The semigroup structure of Gaussian channels (2009)
Heinosaari, Teiko, Holevo, Alexander S., Wolf, Michael M.
We investigate the semigroup structure of bosonic Gaussian quantum channels. Particular focus lies on the sets of channels which are divisible, idempotent or Markovian (in the sense of either...
Deciding whether a Quantum Channel is Markovian is NP-hard (2009)
Cubitt, Toby S., Eisert, Jens, Wolf, Michael M.
We show that deciding whether a given quantum channel can be generated by a Markovian master equation is an NP-hard problem. As a consequence, this result suggests that extracting the underlying...
Wolf, Michael M., Perez-Garcia, David, Fernandez, Carlos
It is well known that jointly measurable observables cannot lead to a violation of any Bell inequality - independent of the state and the measurements chosen at the other site. In this letter we...
Assessing dimensions from evolution (2009)
Wolf, Michael M., Perez-Garcia, David
Using tools from classical signal processing, we show how to determine the dimensionality of a quantum system as well as the effective size of the environment's memory from observable dynamics in a...
On exchangeable continuous variable systems (2009)
König, Robert, Wolf, Michael M.
We investigate permutation-invariant continuous variable quantum states and their covariance matrices. We provide a complete characterization of the latter with respect to permutation invariance and...
Pairing in fermionic systems: A quantum-information perspective (2009)
Kraus, Christina V., Wolf, Michael M., Cirac, J. Ignacio, Giedke, Géza
Matrix product states: Symmetries and two-body Hamiltonians (2009)
Sanz, Mikel, Wolf, Michael M., Perez-García, David, Cirac, J. Ignacio
Pairing in fermionic systems: A quantum information perspective (2008)
Kraus, Christina V., Wolf, Michael M., Cirac, J. Ignacio, Giedke, Geza
The notion of "paired" fermions is central to important condensed matter phenomena such as superconductivity and superfluidity. While the concept is widely used and its physical meaning is clear...
On Exchangeable Continuous Variable Systems (2008)
Koenig, Robert, Wolf, Michael M.
We investigate permutation-invariant continuous variable quantum states and their covariance matrices. We provide a complete characterization of the latter with respect to permutation-invariance,...
Assessing Non-Markovian Quantum Dynamics (2008)
Wolf, Michael M., Eisert, J., Cubitt, T. S., Cirac, J. Ignacio
Efficient Large-Scale Network-Based Simulation of Disease Outbreaks (2007)
Brian M. Adams, Karen D. Devine, Jaideep Ray, Michael M. Wolf
Efficient Large-Scale Network-Based Simulation of Disease Outbreaks (2007)
Brian M. Adams, Karen D. Devine, Jaideep Ray, Michael M. Wolf
Efficient Large-Scale Network-Based Simulation of Disease Outbreaks (2007)
Brian M. Adams, Karen D. Devine, Jaideep Ray, Michael M. Wolf
The computational complexity of PEPS (2006)
Schuch, Norbert, Wolf, Michael M., Verstraete, Frank, Cirac, J. Ignacio
We determine the computational power of preparing Projected Entangled Pair States (PEPS), as well as the complexity of classically simulating them, and generally the complexity of contracting tensor...
Quantum states on Harmonic lattices (2005)
Schuch, Norbert, Cirac, J. Ignacio, Wolf, Michael M.
We investigate bosonic Gaussian quantum states on an infinite cubic lattice in arbitrary spatial dimensions. We derive general properties of such states as ground states of quadratic Hamiltonians for...