1
|
Warrick ER, Fidler AP, Cao W, Bloch E, Neumark DM, Leone SR. Multiple pulse coherent dynamics and wave packet control of the N2 a′′ 1Σ+g dark state by attosecond four-wave mixing. Faraday Discuss 2018; 212:157-174. [DOI: 10.1039/c8fd00074c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Dark states of molecular nitrogen in the XUV region are spectroscopically investigated using few-femtosecond dynamic wave packet control.
Collapse
Affiliation(s)
- Erika R. Warrick
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| | - Ashley P. Fidler
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| | - Wei Cao
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| | - Etienne Bloch
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Daniel M. Neumark
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| | - Stephen R. Leone
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| |
Collapse
|
2
|
Koch CP. Controlling open quantum systems: tools, achievements, and limitations. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:213001. [PMID: 27143501 DOI: 10.1088/0953-8984/28/21/213001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The advent of quantum devices, which exploit the two essential elements of quantum physics, coherence and entanglement, has sparked renewed interest in the control of open quantum systems. Successful implementations face the challenge of preserving relevant nonclassical features at the level of device operation. A major obstacle is decoherence, which is caused by interaction with the environment. Optimal control theory is a tool that can be used to identify control strategies in the presence of decoherence. Here we review recent advances in optimal control methodology that allow typical tasks in device operation for open quantum systems to be tackled and discuss examples of relaxation-optimized dynamics. Optimal control theory is also a useful tool to exploit the environment for control. We discuss examples and point out possible future extensions.
Collapse
Affiliation(s)
- Christiane P Koch
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| |
Collapse
|
3
|
Arasaki Y, Takatsuka K. Pulse-Train Photoelectron Spectroscopy of Electronic and Nuclear Dynamics in Molecules. Chemphyschem 2013; 14:1387-96. [DOI: 10.1002/cphc.201201094] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 03/06/2013] [Indexed: 11/06/2022]
|
4
|
Abstract
Controlling dynamical processes at the atomic and molecular scales with laser radiation has been a long-standing dream. The Faraday Discussion presented a cross section of the current experimental and theoretical advances as well as the challenges for the field. This paper summarizes the current status of controlling quantum dynamics phenomena and provides a perspective on the future.
Collapse
Affiliation(s)
- Herschel Rabitz
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| |
Collapse
|
5
|
Petersen J, Wohlgemuth M, Sellner B, Bonačić-Koutecký V, Lischka H, Mitrić R. Laser pulse trains for controlling excited state dynamics of adenine in water. Phys Chem Chem Phys 2012; 14:4687-94. [DOI: 10.1039/c2cp24002e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Roslund J, Shir OM, Dogariu A, Miles R, Rabitz H. Control of nitromethane photoionization efficiency with shaped femtosecond pulses. J Chem Phys 2011; 134:154301. [DOI: 10.1063/1.3576052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
7
|
Petersen J, Mitrić R, Bonacić-Koutecký V, Wolf JP, Roslund J, Rabitz H. How shaped light discriminates nearly identical biochromophores. PHYSICAL REVIEW LETTERS 2010; 105:073003. [PMID: 20868039 DOI: 10.1103/physrevlett.105.073003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Indexed: 05/29/2023]
Abstract
We present a general mechanism for successful discrimination of spectroscopically indistinguishable biochromophores by shaped light. For this purpose we use nonadiabatic dynamics in excited electronic states in the frame of the field-induced surface hopping method driven by the experimentally shaped laser fields. Our findings show that optimal laser fields drive low-frequency vibrational modes localized in the side chains of two biochromophores, thus selecting the parts of their potential energy surfaces characterized by different transition dipole moments leading to different ionization probabilities. The presented mechanism leads to selective fluorescence depletion which serves as a discrimination signal. Our findings offer a promising perspective for using optimally shaped laser pulses in bioanalytical applications by increasing the selectivity beyond the current capability.
Collapse
Affiliation(s)
- Jens Petersen
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
8
|
Weber SM, Plewicki M, Weise F, Lindinger A. Parametric polarization pulse shaping demonstrated for optimal control of NaK. J Chem Phys 2008; 128:174306. [DOI: 10.1063/1.2907734] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
9
|
|
10
|
Mitra A, Rabitz H. Quantum control mechanism analysis through field based Hamiltonian encoding: A laboratory implementable algorithm. J Chem Phys 2008; 128:044112. [DOI: 10.1063/1.2820787] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
11
|
Schäfer-Bung B. The interplay of wave packet dephasing, optimization efficiency, and target state population in optimally controlled isotope selective photoionization. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2007.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Weise F, Weber SM, Plewicki M, Lindinger A. Application of phase, amplitude, and polarization shaped pulses for optimal control on molecules. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2006.12.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
13
|
Schäfer-Bung B, Bonacić-Koutecký V, Sauer F, Weber SM, Wöste L, Lindinger A. Isotope selective photoionization of NaK by optimal control: Theory and experiment. J Chem Phys 2006; 125:214310. [PMID: 17166024 DOI: 10.1063/1.2363191] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a joint theoretical and experimental study of the maximization of the isotopomer ratio (23)Na(39)K(23)Na(41)K using tailored phase-only as well as amplitude and phase modulated femtosecond laser fields obtained in the framework of optimal control theory and closed loop learning (CLL) technique. A good agreement between theoretically and experimentally optimized pulse shapes is achieved which allows to assign the optimized processes directly to the pulse shapes obtained by the experimental isotopomer selective CLL approach. By analyzing the dynamics induced by the optimized pulses we show that the mechanism involving the dephasing of the wave packets between the isotopomers (23)Na (39)K and (23)Na (41)K on the first excited state is responsible for high isotope selective ionization. Amplitude and phase modulated pulses, moreover, allow to establish the connection between the spectral components of the pulse and corresponding occupied vibronic states. It will be also shown that the leading features of the theoretically shaped pulses are independent from the initial conditions. Since the underlying processes can be assigned to the individual features of the shaped pulses, we show that optimal control can be used as a tool for analysis.
Collapse
Affiliation(s)
- Boris Schäfer-Bung
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
14
|
Mitra A, Rabitz H. Quantum control mechanism analysis through field based Hamiltonian encoding. J Chem Phys 2006; 125:194107. [PMID: 17129089 DOI: 10.1063/1.2371079] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Optimal control of quantum dynamics in the laboratory is proving to be increasingly successful. The control fields can be complex, and the mechanisms by which they operate have often remained obscure. Hamiltonian encoding (HE) has been proposed as a method for understanding mechanisms in quantum dynamics. In this context mechanism is defined in terms of the dominant quantum pathways leading to the final state of the controlled system. HE operates by encoding a special modulation into the Hamiltonian and decoding its signature in the dynamics to determine the dominant pathway amplitudes. Earlier work encoded the modulation directly into the Hamiltonian operators. This present work introduces the alternative scheme of field based HE, where the modulation is encoded into the control field and not directly into the Hamiltonian operators. This distinct form of modulation yields a new perspective on mechanism and is computationally faster than the earlier approach. Field based encoding is also an important step towards a laboratory based algorithm for HE as it is the only form of encoding that may be experimentally executed. HE is also extended to cover systems with noise and uncertainty and finally, a hierarchical algorithm is introduced to reveal mechanism in a stepwise fashion of ever increasing detail as desired. This new hierarchical algorithm is an improvement over earlier approaches to HE where the entire mechanism was determined in one stroke. The improvement comes from the use of less complex modulation schemes, which leads to fewer evaluations of Schrodinger's equation. A number of simulations are presented on simple systems to illustrate the new field based encoding technique for mechanism assessment.
Collapse
Affiliation(s)
- Abhra Mitra
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
| | | |
Collapse
|
15
|
Lindinger A, Weber SM, Merli A, Sauer F, Plewicki M, Wöste L. Optimal control methods applied on the ionization processes of alkali dimers. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.02.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
16
|
Kaiser A, May V. Optimal control theory with continuously distributed target states: An application to NaK. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.06.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
17
|
|
18
|
Werschnik J, Gross EKU. Tailoring laser pulses with spectral and fluence constraints using optimal control theory. ACTA ACUST UNITED AC 2005. [DOI: 10.1088/1464-4266/7/10/014] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
19
|
Bonacić-Koutecký V, Mitrić R. Theoretical Exploration of Ultrafast Dynamics in Atomic Clusters: Analysis and Control. Chem Rev 2004; 105:11-66. [PMID: 15720151 DOI: 10.1021/cr0206925] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vlasta Bonacić-Koutecký
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany.
| | | |
Collapse
|