Quantum Solutions Physicist

We believe quantum computing will change everything.  It will have the power to transform the foundations of giant industries that rely on intensive computation.  PsiQuantum is on a mission to build the world’s first useful quantum computer, capable of delivering these transformative results.  We know that means it will need 1 million qubits, error correction, a scalable architecture and a data center footprint.By harnessing the laws of quantum physics, quantum computers can provide exponential performance increases over today’s most powerful supercomputers, offering the potential for extraordinary advances across a broad range of industries including climate, energy, healthcare, pharmaceuticals, finance, agriculture, transportation, materials design, and many more. PsiQuantum is uniquely positioned to deliver on the promise of quantum computing years earlier than our competitors. Our architecture is based on photonics which gives us the ability to produce our components using existing high-volume semiconductor manufacturing processes, the same processes that are today producing billions of chips for telecom and consumer electronics applications. Since photons don’t feel heat, we can take advantage of existing cryogenic cooling systems, the kind that have been operating at facilities like the Stanford Linear Accelerator (SLAC).  And because photons are in fact light, they can move between subsystems at tremendous speed using standard fiber connectivity.Our team is building a utility scale quantum computer and the software tools needed to build fault tolerant quantum applications. We’re a highly motivated and collaborative group focused on a singular goal - building the world’s first useful quantum computer on the fastest path possible. There’s much more work to be done and we are looking for exceptional talent to join us on this extraordinary journey! Job Summary: Want to be at the forefront of using theoretical and computational physics and materials science to maximize the impact of quantum algorithms and fault tolerant quantum computing (FTQC) in generating exact and useful quantum data for a wide range of industrial applications? As a Quantum Solutions Physicist, you will join a dynamic and rapidly expanding team of theoretical physicists/chemists, machine learning experts, and quantum information scientists, which values individuals with a diverse set of skills. You will join a supportive environment that thrives on innovation and collaboration, offering opportunities for personal growth and leadership. This role will hone your skills as a problem solver and solution maker, keeping you at the forefront of quantum chemistry while working within a leading company on track to building the world’s first useful quantum computers.At PsiQuantum’s Quantum Solutions team, your role will focus on bridging the gap between fault-tolerant quantum computing (FTQC) and established computational physics and chemistry tools, integrating these with machine learning to pioneer quantum computer-aided materials design. You will contribute expert knowledge in computational and theoretical (materials) physics and chemistry methodologies and engage in collaborative problem-solving to link quantum-computed atomic and molecular properties with complex macroscopic observables. These efforts will support innovations in applied fields such as energy materials, superconductors, batteries, and catalysis, among others.This position is ideal for a PhD holder in computational physics or chemistry (or a closely related field), preferably with postdoctoral research experience (although postdoc experience is not mandatory). We are looking for a curious, creative, and interdisciplinary thinker with a comprehensive understanding of various computational physics and chemistry methodologies. The ideal candidate should be an avid reader of scientific literature, have hands-on coding experience (e.g., Python), and possess skills in methodology development, which may include contributions to open-source atomistic simulation software packages. While prior knowledge of quantum information and fault-tolerant quantum computing is highly preferred, it is not required. More importantly, you should be a curious person who has a keen interest in and dedication to learning about these fields as needed and in a continuous fashion.Responsibilities:Conduct innovative research, literature analysis, problem solving, and quantum workflow design in the areas of quantum-informed materials modeling, and computational physics and chemistry.Collaborate with quantum algorithm experts where quantum computing can be deployed with greatest impact in computational physics, chemistry, and materials problems.Contributing non-quantum-computing algorithm expertise to the development of in-house quantum algorithms. Serve as a technical lead in customer projects by collaborating with customers’ teams to integrate quantum computing-produced computational outputs into conventional customer workflows.Act as an interface between partner teams and PsiQuantum quantum information experts for innovative algorithm selection, development, prioritization, and deployment.Develop computational workflows that combine best-in-class conventional approaches (e.g., through high performance computing (HPC)) with the breakthrough computational abilities of FTQC to reshape how quantum (materials) chemistry workflows are designed.Serve as a computational quantum (materials) physics and chemistry source of knowledge to PsiQuantum’s Quantum Solutions team, keeping aware of recent academic literature, trends, and tools.Build strong cross-team relationships within PsiQuantum to enable innovative use of quantum algorithms to achieve maximum impact for quantum computing-generated data.Help shape external-facing materials that champion the applications of FTQC in relevant industries (for key opinion leaders, media, and partners).Build and maintain external partnerships and collaborations on the topic which can include meetings, group problem solving sessions, or drafting research proposals, among others.Create organized internal reports and well document progress made for directions above.Experience/Qualifications:Required:Ph.D. in computational (theoretical) physics, chemistry, or a closely related field with a strong focus on computational methodology development.Strong foundational knowledge in density functional theory (DFT).Strong foundational knowledge in computational solid-state physics.Knowledge and hands-on experience with the Fermi-Hubbard model or similar strongly correlated lattice models, e.g., familiarity with computational techniques such as exact diagonalization, quantum Monte Carlo (QMC), tensor network methods (e.g., Matrix Product States, PEPS), or comparable approaches for handling complex entanglement and correlations.Hands-on experience with molecular and materials modeling for applied research problemsEnthusiasm for working in a collaborative, interdisciplinary, and dynamic team environment.Expert-level Python coding skills.Highly Preferred:Experience with quantum dynamics and excited states physics and chemistryDFT methodology development experience, e.g., development of new exchange-correlation functionals.Deep understanding of and hands-on experience with machine learning (ML) and active learning techniques as they apply to computational physics, chemistry, and materials informatics.Experience in effective modeling of light-matter interactionsExperience with applying quantum computing and algorithms to physics, chemistry, and materials problems.Industry/professional experience would be a plus.Preferred:Knowledge of quantum embedding theories (e.g., embedded correlated wavefunctions, DMET, etc.).Experience with localized molecular orbitals, Wannier functions, or active space selection.Hands-on experience with advanced quantum mechanical wavefunction-based methods, especially coupled clusters, and potentially configuration interaction methods, e.g., CASCI, CASSCF.Demonstrated scientific communication skills through academic publications.PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.We are not accepting unsolicited resumes from employment agencies.The range below reflects the minimum and maximum target range for new hire base salary across all US locations. Actual compensation may vary outside of this range and is dependent on various factors including but not limited to a candidate's qualifications including relevant education and training, competencies, experience, geographic location, and business needs. Base pay is only one part of the total compensation package. Full time roles are eligible for equity and benefits. Base pay is subject to change and may be modified in the future.For a fully qualified candidate, the expected base pay range is: Base Pay Range $145,000—$175,000 USD