Preparation of excited states for nuclear dynamics on a quantum computer

Nuclear Structure at the Crossroads

“…Looking to the future, there are potential new opportunities for nuclear structure from emerging technologies. These include machine learning [71], quantum computing [72][73][74][75], computing technologies such as tensor networks [76][77][78], and automatic code generation [79][80][81]. Talks at the INT Crossroads program that specifically addressed such opportunities were given by Bedaque, Duguet, Drischler, Hergert, Lee, and Lovato, and there were many additional contributions during the discussion times.…”

“…While the technical hurdles are formidable on the hardware side, there are strong efforts underway to be ready with suitable algorithms for nuclear applications. These applications include calculating nuclear ground-state energies and nuclear dynamics within linear response theory [75], and addressing entanglement in quantum field theory, which could be relevant for both effective field theory and lattice QCD [85,86].…”

Nuclear two point correlation functions on a quantum-computer

“…Alternately, one can implement the sum in Eq. ( 12) using the "linear combination of unitaries (LCU)" algorithm [37] and performing the quantum control on the PREPARE unitary instead (see also [25]). Of course, these two techniques can be combined together to obtain the benefits of both.…”

“…In this paper we study two-point functions of a simple nuclear model, first introduced in Ref. [23], using current quantum hardware, and recently developed error mitigation strategies [24,25].…”

Bootstrapping the deuteron

“…Inspired by the huge success of artificial intelligence (AI), new variational methods based on artificial neural networks (ANNs) are put forward for few-nucleon systems, incorporating the latest advances in AI into conventional variational methods [3][4][5]. Also, lots of interests are stimulated in developing new theoretical methods on quantum devices, encouraged by the public accessibility of quantum computing clouds via the internet [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These achievements enrich our tools to study nuclear systems.…”