Quantum Tunneling in Complex Systems,
J. Ankerhold, Springer Tracts in Modern Physics 224, (2007).

Special issue of Chemical Physics "Real-time Dynamics in Complex Quantum Systems",  J. Ankerhold and E. Pollak (eds.), Chem. Phys. 322 (2006).

Special Issue of Chemical Physics "Dynamics of Molecular Systems: From Quantum to Classical", J. Ankerhold, J, Shao, P. Talkner (Guest Eds.), Chem. Phys. 370 (2010).


B. Jäck, J. Senkpiel, M. Etzkorn, J. Ankerhold, C. R. Ast, and K. Kern,
Quantum Brownian motion at strong dissipation probed by superconducting tunnel junctions
Phys. Rev. Lett. 119, 147702 (2017)

M. Mecklenburg, B. Kubala, and J. Ankerhold,
Thermopower and dynamical Coulomb blockade in non-classical environments
Phys. Rev. B 96, 155405

M. Westig, B. Kubala, O. Parlavecchio, Y. Mukharsky, C. Altimiras, P Joyez, D. Vion, P. Roche, M. Hofheinz, D Esteve, M Trif, P. Simon, J. Ankerhold, and F. Portier,
Emission of Nonclassical Radiation by Inelastic Cooper Pair Tunneling
Phys. Rev. Lett. 119, 137001

B. Dutta, J. T. Peltonen, D. S. Antonenko, M. Meschke, M. A. Skvortsov, B. Kubala, J. König, C. B. Winkelmann, H. Courtois, and J. P. Pekola,
Thermal Conductance of a Single-Electron Transistor
Phys. Rev. Lett. 119, 077701

T. Motz, J. Ankerhold, and J. Stockburger,
Currents and fluctuations of quantum heat transport in harmonic chains
New J. Phys. 19 053013 (2017)

Yaxing Zhang, J. Gosner, S. M. Girvin, J. Ankerhold, and M. I. Dykman,
Multiple-period Floquet states and time-translation symmetry breaking in quantum oscillators

S. Dambach, B. Kubala, J. Ankerhold,
Generating Entangled Quantum Microwaves in a Josephson-Photonics Device
New J. Phys. 19, 023027 (2017) 


S. Dambach, B. Kubala, and J. Ankerhold,
Time-resolved statistics of photon pairs in two-cavity Josephson photonics
Fortschr. Phys.. doi:10.1002/prop.201600061 , special volume, FQMT '15 (arXiv:1605.03420)

J. T. Stockburger and T. Motz,
Thermodynamic deficiencies of some simple Lindblad operators
Fortschr. Phys. doi:10.1002/prop.201600067
(invited contribution to special volume FQMT'15)

C. R. Ast, B. Jäck, J. Senkpiel, M. Eltschka, M. Etzkorn, J. Ankerhold, and K. Kern,
Sensing the quantum limit in scanning tunnelling spectroscopy
Nature Communications 7, 13009 (2016) 

M. Wiedmann, J. T. Stockburger, J. Ankerhold,
Time-Correlated Blip Dynamics of Open Quantum Systems

Phys. Rev. A 94, 052137 (2016)

J. T. Stockburger,
Exact propagation of open quantum systems in a system-reservoir context
EPL 115 (2016) 40010

B. Kubala, J. Ankerhold, and A. D. Armour,
Electronic and photonic counting statistics as probes of non-equilibrium quantum dynamics

S. Fuchs, J. Ankerhold, M. Blencowe, and B. Kubala,
Non-equilibrium dynamics of the Dicke model for mesoscopic aggregates: signatures of superradiance
J. Phys. B: At. Mol. Opt. Phys. 49 (2016) 035501


S. Meister, M. Mecklenburg, V. Gramich, J.T. Stockburger, J. Ankerhold, and B. Kubala,
Resonators coupled to voltage-biased Josephson junctions: From linear response to strongly driven nonlinear oscillations
Phys. Rev. B  92, 174532

J. T. Stockburger, R. Schmidt, and J. Ankerhold,
Entanglement generation through local field and quantum dissipation
Phys. Scr. T 165 (2015)  014020 

B. Kubala, V. Gramich, and J. Ankerhold,
Non-classical light from superconducting resonators coupled to voltage-biased Josephson junctions,
Phys. Scr. T 165 (2015) 014029

S. Dambach, B. Kubala, V. Gramich, and J.Ankerhold,
Time-resolved statistics of non-classical light in Josephson photonics
Phys. Rev. B 92, 054508

R. Schmidt, M. F. Carusela, J. P. Pekola, S. Suomela, and J. Ankerhold,
Work and heat for two-level systems in dissipative environments: Strong driving and non-Markovian dynamics
Phys. Rev. B 91, 224303

K. L. Viisanen, S. Suomela, S. Gasparinetti, O. Saira, J. Ankerhold, and J. P. Pekola,
Incomplete measurement of work in a dissipative two level system,
New J. Phys. 17 (2015) 055014 

A. D. Armour, B. Kubala, and J. Ankerhold,
Josephson photonics with a two-mode superconducting circuit
Phys. Rev. B 91, 184508


S. Meister, J. T. Stockburger, R. Schmidt, and J. Ankerhold,
Optimal Control theory with arbitrary superpositions of waveforms
J. Phys. A: Math. Theor. 47 (2014) 495002 

D. Kast and J. Ankerhold,
Bipartite entanglement dynamics of two-level systems in sub-Ohmic reservoirs
Phys. Rev. B 90, 100301(R) 

S. Suomela, P. Solinas, J. P. Pekola, J. Ankerhold, and T. Ala-Nissila,
Moments of work in the two-point measurement protocol for a driven open quantum system
Phys. Rev. B 90, 094304 

J. Ankerhold, and J.P. Pekola,
Heat due to system-reservoir correlations in thermal equilibrium
Phys. Rev. B 90, 075421 (Editors' suggestion).

B. Kubala, D. Roosen, M. Sindel, W. Hofstetter, and F. Marquardt,
Decoherence in a double-dot Aharonov-Bohm interferometer: Numerical renormalization group study
Phys. Rev. B 90, 035417 

V. Gramich, S. Gasparinetti, P. Solinas, and J. Ankerhold,
Lamb shift enhancement and detection in strongly driven superconducting circuits
Phys. Rev. Lett. 113, 027001 (2014).


V. Gramich, B. Kubala, S. Rohrer, and J. Ankerhold
From Coulomb-Blockade to Nonlinear Quantum Dynamics in a Superconducting Circuit with a Resonator,
Phys. Rev. Lett. 111, 247002 (2013)

R. Schmidt, J. T. Stockburger, and J. Ankerhold
Almost local generation of Einstein-Podolsky-Rosen entanglement in nonequilibrium open systems,
Phys. Rev. A 88, 052321

E. Pollak and J. Ankerhold,
Improvements to Kramers turnover theory,
J. Chem. Phys. 138, 164116 (2013) 

M. Köpke and J. Ankerhold,
Linear dynamics subject to thermal fluctuations and non-Gaussian noise: From classical to quantum,
New J. Phys. 15 (2013) 043013

L. Kecke and J. Ankerhold,
Charge transfer through molecular junctions within Redfield theory: subtleties and pitfalls,
arXiv:1301.2422 [cond-mat.mes-hall]
(submitted to PRB)

D. Kast and J. Ankerhold,
Dynamics of quantum coherences at strong coupling to a heat bath,
Phys. Rev. B 87, 134301 (2013)

D. Kast and J. Ankerhold, 
Persistence of coherent quantum dynamics at strong dissipation,
Phys. Rev. Lett. 110, 010402 (2013)


R. Schmidt, S. Rohrer, J. Ankerhold and J. T. Stockburger,
Cooling of quantum systems through optimal control and dissipation,
Physica Scripta T 151 (2012) 014034.

L. Kecke and J. Ankerhold,
Voltage-induced conformational changes and current control in charge transfer through molecules,
Phys. Rev. B 85, 245442 (2012).

M. F. Carusela and J. Ankerhold,
Quantum phase diffusion in ac-driven superconducting atomic point contacts,
Phys. Rev. B 85, 134509 (2012).


V. Gramich, P. Solinas, M. Möttönen, J. P. Pekola, J. Ankerhold,
Measurement scheme for the Lamb shift in a superconducting circuit with broadband environment,
Phys. Rev. A 84, 052103 (2011).

R. Schmidt, A. Negtetti, J. Ankerhold, T. Calarco and J.T. Stockburger,
Optimal control of open quantum systems: cooperative effects of driving and dissipation,
Phys. Rev. Lett 107, 13040 (2011).

D. Kast, L. Kecke and J. Ankerhold,
Charge transfer through single molecule contacts: How reliable are rate descriptions?,
Beilstein J. Nanotechnol. 2, 416 (2011).

A. Verso and J. Ankerhold,
Tunneling in Open Systems,
in: Dynamical Tunneling, S. Keshavamurthy and P. Schlagheck (eds.),
(Taylor and Francis, 2011), 401.

J. C. Escher and J. Ankerhold,
Quantum dynamics of a two-level system in a structured environment: Numerical study beyond perturbation theory,
Phys. Rev. A 83, 032122 (2011).


W. Koch, F. Großmann, J. Stockburger and J. Ankerhold
Semiclassical non-Markowian Brownian motion in anharmonic potentials,
Chem. Phys. 370, 34-41 (2010).

J. Salmilehto, P. Solinas, J. Ankerhold, and M. Möttönen,
Adiabatically steered open quantum systems: Master equation and optimal phase,
Phys. Rev. A 82, 062112 (2010).

A. Verso and J. Ankerhold,
Semiclassic theory of energy diffusive escape in a Duffing oscillator,
Phys. Rev. E 82, 051116 (2010).

W. Koch, F. Grossmann, J. Ankerhold, J.T. Stockburger,
Semiclassical formulation of non-Markovian quantum Brownian motion,
Physica E 42, 388 (2010).
local copy

S. Maier and J. Ankerhold,
Quantum Smoluchowski Equation: A systematic study,
Phys. Rev. E 81, 021107 (2010).

A. Verso and J. Ankerhold,
Dissipation in a rotating frame: Master equation, effective temperature, and Lamb shift,
Phys. Rev. A 81, 022110 (2010).

A. Verso and J. Ankerhold,
Tunneling in open systems, in: Dynamical Tunneling and Semiclassics,
S. Keshvamurthy and P. Schlagheck (eds.), in press
local copy

S. Maier and J. Ankerhold,
Low temperature quantum fluctuation in overdamped ratchets,
Phys. Rev. E 82, 021104 (2010).


H. Fritz and J. Ankerhold,
Nonadiabatic transitions between adiabatic surfaces: phase diffusion in superconducting atomic point contacts,
Phys. Rev. B 80, 064502 (2009).

Counting electrical charges: a problem of thermal escape and quantum tunneling in presence of non-Gaussian noise,
in: Path integrals-new trends and perspectives, W. Jahnke, A. Pelster (eds.), World Scientific, 453 (2009).
local copy

A. Verso and J. Ankerhold,
Semiclassical theory of energy diffusive escape,

Phys. Rev. A 79, 022115 (2009).

L. Mühlbacher and J. Ankerhold,
Charge transfer dynamics in driven molecular ratchets: quantum Monte Carlo results and rate models,
New J. Phys. 11, 035001 (2009).


T. Hikihara, L. Kecke, T. Momoi and A. Furusaki,
Vector chiral and multipolar orders in the spin-1/2 frustrated ferromagnetic chain in magnetic field,
Phys. Rev. B 78, 144404 (2008).

L. Mühlbacher and J. Ankerhold,
Correlated transport of fermions and bosons along molecular chains,
New Journal of Physics 10, 065023 (2008).

W. Koch, F. Grossmann, J.T. Stockburger and J. Ankerhold
Non-Markovian semiclassical dissipative dynamics,
Phys. Rev. Lett. 100, 230402 (2008).


K. Glaum, H. Kleinert and A. Pelster,
Condensation of Ideal Bose Gas Confined in a Box within a Canonical Ensemble,
Phys. Rev. A 76, 063604 (2007).

K. Glaum and A. Pelster,
Bose-Einstein Condensation Temperature of Dipolar Gas in Anisotropic Harmonic Trap,
Phy. Rev. A 76, 023604 (2007).

K. Glaum, A. Pelster, H. Kleinert and T. Pfau,
Critical Temperature of Weakly Interacting Dipolar Condensates,
Phys. Rev. Lett. 98, 080407 (2007).

J. Ankerhold,
Detecting electrical noise with a Josephson junction: A problem of thermal escape in presence of non-Gaussian fluctuations,
Phys. Rev. Lett. 98, 036601 (2007);
ibid, 99, 139901 (2007) (Erratum).

L. Kecke, T. Momoi and A. Furusaki,
Multi-magnon bound states in the frustrated ferromagnetic one-dimensional chain,
Phys. Rev. B 76, 060407(R) (2007).

J. Ankerhold and E. Pollak,
Dissipation can enhance quantum effects,
Phys. Rev. E 75, 041103 (2007).

J. Huhtamäki, M. Möttönen, J. Ankerhold and S.M.M. Virtanen,
Effects of interactions and noise on Bose-Einstein condensates through a potential barrier,
Phys. Rev. A 76, 033605 (2007).

B. Huard, H. Pothier, N.O. Birge, D. Esteve, X. Waintal and J. Ankerhold,
Josephson junctions as detectors for non-Gaussian noise,
Annalen der Physik 16, 736 (2007).


L. Mühlbacher and J. Ankerhold,
Nonequilibrium many-body dynamics along a dissipative Hubbard chain: Symmetries and quantum Monte Carlo simulations,
Phys. Rev. B 74, 165105 (2006).

L. Mühlbacher, C. Escher, and J. Ankerhold,
Real-time Monte Carlo simulations for dissipative tight-binding systems and time local master equations,
Chem. Phys. (special issue) 322, 200 (2006).

L. Mühlbacher and J. Ankerhold,
Single and correlated charge transport across molecular wires,
in: Dynamics of Open Quantum Systems, K.H. Hughes (ed), (CCP6, Daresbury, 2006), 30.


L. Mühlbacher, J. Ankerhold, and A. Komnik,
Nonequilibrium dynamics of correlated electron transfer in molecular chains,
Phys. Rev. Lett. 95, 220404 (2005).

J. Ankerhold and H. Grabert,
How to detect the forth order cumulant of electrical noise,
Phys. Rev. Lett. 95, 186601 (2005).

J. Ankerhold, H. Grabert, and P. Pechukas,
Comment on "Quantum Tunneling at Zero Temperature in the Strong Friction Limit",
Phys. Rev. Lett. 95, 079801 (2005).

L. Kecke, H. Grabert and W. Häusler,
Charge and spin dynamics of interacting Fermions in a one-dimensional harmonic trap,
Phys. Rev. Lett. 94, 176802 (2005).

M. Duckheim and J. Ankerhold,
Influence of low frequency noise on macroscopic quantum tunneling in superconducting circuits,
Phys. Rev. B 71, 134501 (2005).

L. Mühlbacher and J. Ankerhold,
Path Integral Monte-Carlo Simulations for Electronic Dynamics on Molecular Chains: II. Transport across impurities,
J. Chem. Phys. 122, 184715 (2005).

G. Ithier, E. Collin, P. Joyez, D. Vion, D. Esteve, J. Ankerhold and H. Grabert,
Zener enhancement of quantum tunneling in a two level superconducting circuit,
Phys. Rev. Lett. 94, 057004 (2005);
ibid, 96, 029901 (2006) (erratum).

J. Ankerhold and H. Grabert,
Macroscopic Quantum Tunneling of Quantum Bits,
in: Proceedings of the 39th Rencontres de Moriond, "Quantum Information and Decoherence in Nanosystems",
D.C. Glattli, M. Sanquer (eds.), 137 (2005).

J. Ankerhold, H. Grabert and P. Pechukas
Quantum Brownian Motion at Large Friction
in CHAOS, 100 years of Brownian motion
CHAOS 15, 026106 (2005).


A. Pelster and K. Glaum,
Recursive Graphical Solution of Closed Schwinger-Dyson Equations in phi^4-Theory --
Part 1: Generation of Connected and One-Particle Irreducible Feynman Diagrams,

Physica A 335, 455-486 (2004).

L. Kecke and W. Häusler,
Ladder approximation to spin velocities in quantum wires,
Phys. Rev. B 69, 085103 (2004).

F. Cavaliere, A. Braggio, J. T. Stockburger, M. Sassetti, B. Kramer,
Negative differential conductance induced by spin-charge separation,
Phys. Rev. Lett. 93, 036803 (2004).

J. T. Stockburger,
Simulating spin-boson dynamics with stochastic Liouville-von Neumann equations,
Chem. Phys. 296, 159-169 (2004).

L. Mühlbacher, J. Ankerhold, and C. Escher,
Path Integral Monte-Carlo Simulations for Electronic Dynamics on Molecular Chains: I. Sequential hopping and Super-exchange,
J. Chem. Phys. 121, 12696 (2004).

H. Lehle and J. Ankerhold,
Low temperature electron transfer in the strongly condensed phase,
J. Chem. Phys. 120, 1436 (2004).

J. Ankerhold, P. Pechukas, and H. Grabert,
Quantum Brownian Motion at Large Friction,
invited contribution to a focus issue of Chaos,
Chaos 15, 026106.

M. Saltzer and J. Ankerhold,
Wave packet dynamics and tunneling in external time dependent fields: A semiclassical real-time approach,
invited contribution to: New Research in Quantum Physics, (Nova Publishers, New York, 2004).

J. Ankerhold
Quantum phase diffusion and charging effects in overdamped Josephson junctions,
Europhysics Letters 67, 280 (2004).


A. Pelster und K. Glaum,
Many-Body Vacuum Diagrams and Their Recursive Graphical Construction,
Physica Status Solidi B 237, 72-81 (2003).

J. T. Stockburger,
Stochastic and numerical approaches to dissipative quantum mechanics: path integrals and beyond,
Physica Status Solidi B 237, 146-158 (2003).

J. Ankerhold and H. Grabert,
Enhancement of Macroscopic Quantum Tunneling by Landau Zener Transitions,
Phys. Rev. Lett. 91, 016803 (2003).

J. Ankerhold,
Phase space dynamics of overdamped quantum systems,
Europhys. Lett. 61, 301 (2003).

J. Ankerhold,
Quantum dynamics with strong friction: The quantum Smoluchowski equation and beyond,
invited contribution to Physica Acta Polonica B 34, 3569 (2003).

J. Ankerhold,
Dynamics of quantum dissipative systems-from path integrals to Master equations,
invited contribution to: Irreversible Quantum Dynamics,
F. Benatti, R. Floreani (eds.), Lecture Notes in Physics 622 (Springer,New York, 2003), 165.

M. Saltzer and J. Ankerhold,
Semiclassical tunneling in real-time: Wave packet dynamics in static and driven barrier potentials,
Phys. Rev. A 68, 042108 (2003).


W. Häusler, L. Kecke and A.H. MacDonald,
Tomonaga-Luttinger parameters for quantum wires,
Phys. Rev. B 65, 085104 (2002).

J. T. Stockburger and H. Grabert,
Exact c-number representation of non-Markovian quantum dissipation,
Phys. Rev. Lett. 88, 170407(2002).

J. Ankerhold, M. Saltzer, and E. Pollak,
A study of the semiclassical initial value representation at short times,
J. Chem. Phys. 116, 5925-5932 (2002).

C. Rummel and J. Ankerhold,
Partition function for an interacting many body system: beyond the perturbed static path approximation,
EPJ B 29, 105 (2002).

J. Ankerhold and M. Saltzer,
Semiclassical wave-packet tunneling in real-time,
Phys. Lett. A. 305, 251 (2002).

C. Rummel, H. Hofmann, and J. Ankerhold,
Extensions of the perturbed SPA: Decay rates of damped systems and improvement for small temperatures,
in: The Nuclear Many-Body Problem 2001,
W. Nazarewicz and D. Vretenar (eds.), (Kluwer, 2002).


A. Pelster und K. Glaum,
Recursive Graphical Construction of Tadpole-Free Feynman Diagrams and Their Weights in phi^4-Theory,
in: W. Janke, A. Pelster, H.-J. Schmidt, and M. Bachmann (Editors):
Fluctuating Paths and Fields- Dedicated to Hagen Kleinert on the Occasion of His 60th Birthday, pp. 235-246,
World Scientific,  2001.

J. T. Stockburger and H. Grabert,
Non-Markovian quantum state diffusion,
Chem. Phys. 268, 249-256 (2001).

J. Ankerhold,
Quantum decay rates for driven barrier potentials in the strong friction limit,
Phys. Rev. E. 64, 060102 (R) (2001).

P. Pechukas, J. Ankerhold, and H. Grabert,
Quantum Smoluchowski equation II: The overdamped harmonic oscillator,
Phys. Chem. B 105, 6638-6641 (2001).

J. Ankerhold,
Tunneling in Complex Systems and Periodic Orbits,
Adv. Solid State Phys. 41, 433-445 (2001).

A. Lucke and J. Ankerhold,
Dissipative wave--packet dynamics and electron transfer,
J. Chem. Phys. 115, 4696-4707 (2001).

J. Ankerhold, P. Pechukas, and H. Grabert,
Strong friction limit in quantum mechanics: the quantum Smoluchowski equation,
Phys. Rev. Lett. 87, 086802 (2001).

J. Ankerhold and H. Grabert,
Semiclassical time evolution of the density matrix and tunneling,
Phys. Rev. E 61, 3450-3465 (2000).

J. Ankerhold and P. Pechukas,
Quantum fluctuating barriers,
Europhys. Lett. 52, 264-270 (2000).

P. Pechukas, J. Ankerhold, and H. Grabert,
Quantum Smoluchowski equation,
Ann. Phys. (Leipzig) 9, 794-803 (2000).
J. T. Stockburger,
Stabilizing coherent destruction of tunneling,
Phys. Rev. E 59, R4709-R4712 (1999).

J. T. Stockburger and C. H. Mak,
A stochastic Liouvillian algorithm to simulate dissipative quantum dynamics with arbitrary precision,
J. Chem. Phys. 110, 4983-4985 (1999).

A. Lucke, C. H. Mak and J. T. Stockburger,
Semiclassical dynamics of nonadiabatic transitions in discrete-state systems using spin coherent-state path integrals,
J. Chem. Phys. 111, 10843-10851 (1999).

J. Ankerhold, F. Grossmann, and D. Tannor,
Partitioning dynamic and thermal factors in quantum rate calculations: a coherent state approach,
PCCP 1, 1333-1342 (1999).

J. Ankerhold and H. Grabert,
Quantum tunneling and the semiclassical real time evolution of the density matrix,
Europhys. Lett. 47, 285-291 (1999).

J. Ankerhold and H. Grabert ,
Semiclassical real-time theory of quantum tunneling,
in: Path Integrals from peV to TeV,
R. Csalbuoni et al. (eds.) (World Scientific, Singapore, 1999).

J. Ankerhold and P. Pechukas,
Reaction rates for fluctuating barriers with asymmetric noise,
J. Chem. Phys. 111, 4886-4892 (1999).

J. T. Stockburger and C. H. Mak,
Dynamical simulation of current fluctuations in a dissipative two-state system,
Phys. Rev. Lett. 80, 2657-2661 (1998).

M.H. Müser and J. Ankerhold,
Orientational quantum melting and reentrance of linear rotors pinned onto surfaces,
Europhys. Lett. 44, 216-221 (1998).

P. Pechukas and J. Ankerhold,
Mathematical aspects of the fluctuating barrier problem. Existence of equilibrium and relaxation solutions,
Chem. Phys. 235, 5-10 (1998).

J. Ankerhold and P. Pechukas
Mathematical aspects of the fluctuating barrier problem. Explicit equilibrium and relaxation solutions,
Physica A 261, 458-470 (1998).

J. Ankerhold and P. Pechukas,
Eigenvector-eigenvalue rate calculations for the fluctuating barrier problem: Two examples,
Phys. Rev. E 58, 6968-6974 (1998).

A. Lucke, C. H. Mak, R. Egger, J. Ankerhold, J. Stockburger, H. Grabert
Is the direct observation of electronic coherence in electron transfer reactions possible?
J. Chem. Phys. 107, 8397-8408 (1997)

J. Ankerhold and H. Grabert,
Dissipative quantum systems with a potential barrier. III. Steady state nonequilibrium flux across the barrier,
Phys. Rev. E 55, 1355-1374 (1997).

P. Pechukas and J. Ankerhold,
Agmon-Hopfield kinetics in the slow diffusion regime,
J. Chem. Phys. 107, 2444-2450 (1997).

F. J. Weiper, J. Ankerhold, and H. Grabert,
Semiclassical density matrix near the top of a potential barrier,

Physica A 223, 193-213 (1996).

J. Ankerhold and H. Grabert,
Quantum effects in barrier dynamics,
Chem. Phys. 204, 27-40 (1996).

F. J. Weiper, J. Ankerhold, and H. Grabert,
Exact and Semiclassical Density Matrix of a Particle Moving in Barrier Potential with Bound States,
J. Chem. Phys. 104, 7526-7538 (1996).

F. J. Weiper, J. Ankerhold, H. Grabert, E. Pollak,
Semiclassical Quantization of Nonseparable Systems without Periodic Orbits,
Phys. Rev. Lett. 77, 2662-2665 (1996).

J. Ankerhold, H. Grabert, and G.-L. Ingold,
Dissipative quantum systems with a potential barrier: General theory and the parabolic barrier,
Phys. Rev. E 51, 4267-4281 (1995).

J. Ankerhold and H. Grabert,
Dissipative quantum systems with a potential barrier. II. Dynamics near the barrier top
Phys. Rev. E 52, 4704-4723 (1995).

J. Ankerhold, F. J. Weiper, and H. Grabert,
Semiclassical density matrix for the Eckart barrier including the region near the caustic,
in: H. Grabert et al. (eds.), Path Integrals from meV to MeV,
(World Scientific, Singapore 1993).

 J. Ankerhold and H. Grabert,
The density matrix near the top of a potential barrier: a problem of caustics in path integration,
Physica A 188, 568-596 (1992).

J. Ankerhold and D. Schütte,
Nonperturbative many-body techniques applied to the Yang-Mills Hamiltonian in the Schwinger gauge,
Phys. Rev. D 43, 1991-1998 (1991).