Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Optimal control of coupled quantum systems based on the first-order Magnus expansion: Application to multiple dipole-dipole-coupled molecular rotors

Journal Article · · Physical Review A

This paper presents a method for performing approximate optimal control simulations for quantum systems with multiple coupled degrees of freedom. In this work, the time evolution is simulated using the first-order Magnus expansion in the interaction picture, where the couplings between different degrees of freedom are treated as the perturbation. A numerical implementation procedure is presented that leverages upon pairwise couplings and the separability of the zeroth-order time evolution operator to achieve a reduced computational cost, which is analyzed with respect to the number of degrees of freedom. The formulation is compatible with gradient-free methods to optimize the control field, and a stochastic hill climbing algorithm is adopted for this purpose. As illustrations, optimal control simulations are performed for systems of two and three dipole-dipole-coupled molecular rotors under the influence of a control field. For the two-rotor system, the field is optimized to achieve either orientation or entanglement objectives. For the three-rotor system, the field is optimized either to orient all three rotors in the same direction or to orient one rotor in a particular direction while the other two rotors point in the opposite direction.

Research Organization:
Princeton Univ., NJ (United States); Krell Institute, Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); US Army Research Office (ARO)
Grant/Contract Number:
FG02-02ER15344; FG02-97ER25308
OSTI ID:
1800043
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 102; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (50)

A semi-classical implementation of quantum control using Gaussian wave packet dynamics journal August 1995
Wavepacket dancing: Achieving chemical selectivity by shaping light pulses journal December 1989
Molecular alignment and orientation in short pulse laser fields journal October 1999
A numerical study of large sparse matrix exponentials arising in Markov chains journal January 1999
Optimization schemes for selective molecular cleavage with tailored ultrashort laser pulses journal November 2011
Control of molecular orientation with combined near-single-cycle THz and optimally designed non-resonant laser pulses: Carrier-envelope phase effects journal July 2015
Optimal control of coupled spin dynamics: design of NMR pulse sequences by gradient ascent algorithms journal February 2005
The Magnus expansion and some of its applications journal January 2009
Computing matrix functions journal May 2010
Time-dependent quantum-mechanical methods for molecular dynamics journal April 1988
Quantum error correction in a solid-state hybrid spin register journal February 2014
High-fidelity spin entanglement using optimal control journal February 2014
Implementation of an iterative algorithm for optimal control of molecular dynamics into MCTDH journal January 2008
Optimal control of orientation and entanglement for two dipole–dipole coupled quantum planar rotors journal January 2018
New formulations of monotonically convergent quantum control algorithms journal May 2003
Quantum observable homotopy tracking control journal October 2005
Optimal molecular alignment and orientation through rotational ladder climbing journal October 2005
Femtosecond laser pulse control of multidimensional vibrational dynamics: Computational studies on the pyrazine molecule journal July 2006
Free-time and fixed end-point optimal control theory in quantum mechanics: Application to entanglement generation journal January 2009
Optimal control of the local electromagnetic response of nanostructured materials: Optimal detectors and quantum disguises. journal June 2009
Realization of the CNOT quantum gate operation in six-dimensional ammonia using the OCT-MCTDH approach journal July 2009
Microwave Spectra of Molecules of Astrophysical Interest VI. Carbonyl Sulfide and Hydrogen Cyanide journal January 1974
Control of selectivity of chemical reaction via control of wave packet evolution journal November 1985
Optimal control of selective vibrational excitation in harmonic linear chain molecules journal June 1988
Quantum control of multidimensional systems Implementation within the time‐dependent Hartree approximation journal January 1996
A rapid monotonically convergent iteration algorithm for quantum optimal control over the expectation value of a positive definite operator journal July 1998
Implementation of quantum logic gates using polar molecules in pendular states journal January 2013
Quantum control of I2 wave packet localization in solid argon matrix journal February 2000
Quantum phases of dipolar rotors on two-dimensional lattices journal March 2018
Quantum optimal control of multiple weakly interacting molecular rotors in the time-dependent Hartree approximation journal April 2019
Locally optimized control pulses with nonlinear interactions journal October 2019
Quantum optimal control theory journal September 2007
Control of quantum phenomena: past, present and future journal July 2010
Multi-polarization quantum control of rotational motion through dipole coupling journal February 2010
Molecular Dipole Moments and Stark Effects. II. Stark Effects in OCS journal February 1950
Optimal control of quantum-mechanical systems: Existence, numerical approximation, and applications journal June 1988
Optimally controlled quantum molecular dynamics: A perturbation formulation and the existence of multiple solutions journal February 1993
Chopped random-basis quantum optimization journal August 2011
Complexity of controlling quantum many-body dynamics journal April 2014
Quantum optimal control within the rotating-wave approximation journal September 2015
Singularity-free quantum tracking control of molecular rotor orientation journal October 2018
Optimal Control Technique for Many-Body Quantum Dynamics journal May 2011
Controlling Qubit Networks in Polynomial Time journal May 2018
Colloquium : Optimal control of high-harmonic generation journal January 2008
Entanglement in many-body systems journal May 2008
Computing the Action of the Matrix Exponential, with an Application to Exponential Integrators journal January 2011
Nineteen Dubious Ways to Compute the Exponential of a Matrix, Twenty-Five Years Later journal January 2003
Predicting Structure in Sparse Matrix Computations journal January 1994
Effect of intrinsic decoherence on entanglement of three polar molecules with two-dimensional rotation journal March 2019
An iteration method for the solution of the eigenvalue problem of linear differential and integral operators journal October 1950

Similar Records

Quantum optimal control of multiple weakly interacting molecular rotors in the time-dependent Hartree approximation
Journal Article · Mon Apr 22 00:00:00 EDT 2019 · Journal of Chemical Physics · OSTI ID:1609378

Optimal control of orientation and entanglement for two dipole–dipole coupled quantum planar rotors
Journal Article · Sun Dec 31 23:00:00 EST 2017 · Physical Chemistry Chemical Physics. PCCP (Print) · OSTI ID:1539995