Publications (20)
Scalable quantum register based on coupled electron spins in a room temperature solid
P. Neumann, R. Kolesov, B. Naydenov +12
Realization of devices based on quantum laws might lead to building processors that outperform their classical analogues and establishing unconditionally secure communication proto…
Uniformity in cube-covering systems
J. Beck, W. W. L. Chen
We establish various analogs of the Kronecker-Weyl equidistribution theorem that can be considered higher-dimensional versions of results established in our earlier investigation o…
Time-quantitative density of non-integrable systems
J. Beck, W. W. L. Chen
We introduce a new method to establish time-quantitative density in flat dynamical systems. First we give a shorter and different proof of our earlier result that a half-infinite g…
Critical fluctuations of the proton density in A+A collisions at GeV
T. Anticic, B. Baatar, D. Barna +71
We look for fluctuations expected for the QCD critical point using an intermittency analysis in the transverse momentum phase space of protons produced around midrapidity in the 12…
New Kronecker-Weyl type equidistribution results and diophantine approximation
J. Beck, W. W. L. Chen, Y. Yang
An interesting result of Veech more than 50 years ago is a parity, or mod , version of the Kronecker--Weyl equidistribution theorem concerning the irrational rotation sequence $…
Billiards in polyhedra: a method to convert 2-dimensional uniformity to 3-dimensional uniformity
J. Beck, W. W. L. Chen, Y. Yang
The class of 2-dimensional non-integrable flat dynamical systems has a rather extensive literature with many deep results, but the methods developed for this type of problems, both…
A note on density of geodesics
J. Beck, W. W. L. Chen, Y. Yang
We extend the famous result of Katok and Zemlyakov on the density of half-infinite geodesics on finite flat rational surfaces to half-infinite geodesics on a finite polycube transl…
Irreversible and dissipative systems
J. Beck, W. W. L. Chen, Y. Yang
We study some new dynamical systems where the corresponding piecewise linear flow is neither time reversible nor measure preserving. We create a dissipative system by starting with…
Generalization of a density theorem of Khinchin and diophantine approximation
J. Beck, W. W. L. Chen
The continuous version of a fundamental result of Khinchin says that a half-infinite torus line in the unit square exhibits superdensity, which is a best form of time-qua…
Coherence of single spins coupled to a nuclear spin bath of varying density
N. Mizuochi, P. Neumann, F. Rempp +9
The dynamics of single electron and nuclear spins in a diamond lattice with different 13C nuclear spin concentration is investigated. It is shown that coherent control of up to thr…
A note on the Kronecker--Weyl equidistribution theorem
J. Beck, W. W. L. Chen, Y. Yang
We study the relationship between the discrete and the continuous versions of the Kronecker--Weyl equidistribution theorem, as well as their possible extension to manifolds in high…
Uniformity of geodesic flow in non-integrable 3-manifolds
J. Beck, W. W. L. Chen, Y. Yang
Almost nothing is known concerning the extension of -dimensional Kronecker--Weyl equidistribution theorem on geodesic flow from the unit torus to non-integrable finite…
Spin Environment of a Superconducting Qubit in High Magnetic Fields
S. Günzler, J. Beck, D. Rieger +9
Superconducting qubits equipped with quantum non-demolition readout and active feedback can be used as information engines to probe and manipulate microscopic degrees of freedom, w…
Dark states of single NV centers in diamond unraveled by single shot NMR
G. Waldherr, J. Beck, M. Steiner +5
The nitrogen-vacancy (NV) center in diamond is supposed to be a building block for quantum computing and nanometer scale metrology at ambient conditions. Therefore, precise knowled…
Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
V. Jacques, P. Neumann, J. Beck +7
We report a versatile method to efficiently polarize single nuclear spins in diamond, which is based on optical pumping of a single NV color center and mediated by a level-anti cro…
Universal enhancement of the optical readout fidelity of single electron spins
M. Steiner, P. Neumann, J. Beck +2
Precise readout of spin states is crucial for any approach towards physical realization of a spin-based quantum computer and for magnetometry with single spins. Here, we report a n…
Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance
P. Neumann, R. Kolesov, V. Jacques +8
Using pulsed optically detected magnetic resonance techniques, we directly probe electron-spin resonance transitions in the excited-state of single Nitrogen-Vacancy color centers i…
Super-fast spreading of billiard orbits in rational polygons and geodesics on translation surfaces
J. Beck, W. W. L. Chen
In this paper, we show that billiard orbits in rational polygons and geodesics on translation surfaces exhibit super-fast spreading, an optimal time-quantitative majority property…
Quantitative behavior of non-integrable systems (III)
J. Beck, W. W. L. Chen, Y. Yang
The main purpose of part (III) is to give explicit geodesics and billiard orbits in polysquares that exhibit time-quantitative density. In many instances, we can even establish a b…
Superdensity and super-micro-uniformity in non-integrable flat systems
J. Beck, W. W. L. Chen
We show that on any non-integrable finite polysquare translation surface, superdensity, an optimal form of time-quantitative density, leads to an optimal form of time-quantitative…