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Simplified instantaneous non-local quantum computation with applications to position-based cryptography
Novel protocols are proposed for instantaneous measurements of non-local observables between space-like separated regions and it is proved that certain schemes are secure under the assumption that the adversary has less entanglement than a given bound and is restricted to classical communication.
Obstacles to Variational Quantum Optimization from Symmetry Protection.
- S. Bravyi, A. Kliesch, Robert Koenig, Eugene Tang
- Computer SciencePhysical review letters
- 20 October 2019
This work proposes a nonlocal version of the QAOA and gives numerical evidence that it significantly outperforms the standard QAoa for frustrated Ising models and reveals fundamental limitations of theQAOA resulting from the symmetry and the locality of variational states.
How to efficiently select an arbitrary Clifford group element
We give an algorithm which produces a unique element of the Clifford group on n qubits ( Cn ) from an integer 0≤i<Cn (the number of elements in the group). The algorithm involves O(n 3) operations…
A de Finetti representation for finite symmetric quantum states
Consider a symmetric quantum state on an n-fold product space, that is, the state is invariant under permutations of the n subsystems. We show that, conditioned on the outcomes of an informationally…
Dual Allosteric Inhibition of SHP2 Phosphatase.
This work illustrates a rare example of dual allosteric targeted protein inhibition, demonstrates screening methodology and tactics to identifyAllosteric inhibitors, and enables further interrogation of SHP2 in cancer and related pathologies.
Unconditional Security From Noisy Quantum Storage
- Robert Koenig, S. Wehner, Jürg Wullschleger
- Computer Science, MathematicsIEEE Transactions on Information Theory
- 4 June 2009
A novel protocols for oblivious transfer and bit commitment are constructed, and it is proved that realistic noise levels provide security even against the most general attack.
Quantum computation with Turaev–Viro codes
Enhanced noise resilience of the surface–Gottesman-Kitaev-Preskill code via designed bias
It is shown that Gaussian encodings of individual modes can enhance concatenated codes and improve the noise tolerance of this surface-GKP code with respect to (Gaussian) displacement errors.
Quantum advantage with noisy shallow circuits
This work constructs a relation problem which can be solved with near certainty using a noisy constant-depth quantum circuit composed of geometrically local gates in three dimensions, provided the noise rate is below a certain constant threshold value.
The conditional entropy power inequality for Gaussian quantum states
- Robert Koenig
- Computer Science, Physics
- 25 April 2013
A generalization of the quantum entropy power inequality involving conditionalEntanglement-assisted classical communication over additive bosonic noise channels and a proof based on perturbation theory for symplectic spectra are given.